Asme b16.20A- - Metal Gasket For Piping Flange (American standart)

STDOASME B L b - Z O A - E N G L 2000 0757b70 ObL7b7b T37 AN AMERICAN NATIONAL STANDARD ASME B16.20a-2000 ADDENDA to ...

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STDOASME B L b - Z O A - E N G L 2000

0757b70 ObL7b7b T37

AN AMERICAN NATIONAL STANDARD

ASME B16.20a-2000 ADDENDA to

ASME B16.20-1998 METALLIC GASKETS FOR PIPE FLANGES Ring-Joint, Spiral-Wound, and Jacketed

THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Three Park Avenue

COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services

New York, NY 10016

S T D - A S M E B L b - 2 0 A - E N G L 2000 H 0757b70 ObL7b77 773 0

Date of Issuance: July 21, 2000

ASME is the registered trademark of The American Society of Mechanical Engineers.

This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made availablefor public review and comment thatprovides an opportunity for additional public input from industry,academia, regulatory agencies, and the public-at-large. ASME does not "approve," "rate," or "endorse" any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentionedin thisdocument, anddoes not undertake to insure anyone utilizing a standard againstliability for infringementof any applicable letters patent, norassume any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by federal agency representative(s) or person(s) affiliatedwith industry is not to be interpreted as government or industry endorsement of this code or standard. ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals.

No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.

The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990

Copyright O 2000 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.


STD-ASME BLb.20A-ENGL 2000

m

0759b70 ObL7b78 BOT

m

ASME B16.20a-2000

Following approval by the ASME B16 Committee and ASME, and after public review, ASME B 16.20a2000 was approved by the American National Standards Institute on May 3, 2000. Addenda to the 1998 edition of ASME B 16.20 are issued in the form of replacement pages. Revisions, additions, and deletions are incorporated directly into the affected pages. It is advisable, however, that this page, the Addenda title and copyright pages, and all replaced pages be retained for reference.

SUMMARY OF CHANGES This is the first Addenda to be published to ASME B16.20-1998. Replace or insert the pages listed. Changes given below are identified on the pages by a margin note, (a), placed next to the affected area. The pages not listed are the reverse sides of the listed pages and contain no changes.

Change

Page

Location

V

Committee Roster

xi

Contents

2, 2.1

Paragraph 3.2.5

Revised

21

Table 12

Notes (1 ) and ( 3 ) revised

23

Table 14

General Note (c) and Notes ( I ) and ( 2 ) revised

24

Table 15

( I ) Title revised (2) General Notesadded

28

Table 19

Revised

35

AnnexMandatory


to

I

to Updated

reflect Addenda

Updated

reflect Addenda

Revised

ASME B16 COMMITTEE Standardization of Valves, Flanges, Fittings, Gaskets, and Valve Actuators (The following is the roster of the Committee at the time of approval of thisStandard.)

OFFICERS W. N. McLean, Chair H. R. Sonderegger, Vice Chair P. A. Reddington, Secretary

COMMllTEE PERSONNEL W. L. Ballis, Consultant, London, Ohio R. W. Barnes, Anric Enterprises, Etobicoke, Ontario, Canada R. R. Brodin, Fisher Controls International, Inc., Marshalltown, Iowa M. A. Clark, Nibco, Inc., Elkhart, Indiana A. Cohen, A. Cohen and Associates, Albuquerque, New Mexico C. E. Floren, Mueller Co., Decatur. Illinois D. R. Frikken, Solutia. Inc., St. Louis, Missouri R. Henrich, Minnegasco, Inc., Golden Valley, Minnesota J. C. Inch, Mueller Refrigeration Products Co., Hartsville, Tennessee G. A. Jolly, Vogt Valve Co., Louisville, Kentucky W. G. Knecht, BW/IP International, Inc., Williamsport, Pennsylvania R. Koester, The William Powell Co., Cincinnati, Ohio W. N. McLean, Newco Valves, Palos Park, Illinois M . L. Nayyar, Bechtel Power Corp., Gaithersburg, Maryland P. A. Reddington, American Society of Mechanical Engineers, New York, New York R. A. Schmidt, Trinity-Ladish Co., Russellville, Arkansas H. R. Sonderegger, Grinnell Corp., Cranston, Rhode Island W. M . Stephan, Flexitallic, Inc., Mount Laurel, New Jersey T. F. Stroud, Ductile Iron Pipe Research Association, Birmingham, Alabama M. D. Wasicek, ABS Americas, Houston, Texas R. E. White, Richard E. White and Associates, South Bend, Indiana D. A. Williams, Southern Company Services, Birmingham, Alabama L. A. Willis, The Dow Chemical Co., Freeport, Texas W. R. Worley, Union Carbide Corp.. South Charleston, West Virginia

SUBCOMMITTEE G - GASKETS FOR FLANGED JOINTS W. M. Stephan, Chair, Flexitallic, Inc., Mount Laurel, New Jersey C.B. Gillis, Vice Chair, Lamons Gasket Co., Houston, Texas M. R. Argenziano, Secretary, American Society of Mechanical Engineers, New York, New York K. A. Benton, Leader Gasket, Inc., Houston, Texas W. E. Holden, Solutia, Inc., Alvin, Texas D. H. Monroe, Consultant, Birmingham, Alabama R. T. Mueller, ExxonMobil Research and Engineering Co., Florham Park, New Jersey D. F. Reid, Garlock Metallic Gasket Division, Houston, Texas J. Tzeng, Ucar Carbon Co., Inc., Parma, Ohio W. R. Worley, Union Carbide Corp., South Charleston, West Virginia

V


CONTENTS ...

Foreword ................................................................................. Committee Roster .......................................................................... Correspondence Withthe B 16 Committee .................................................... Important Information Concerning Use of Asbestos or Alternative Materials .....................

v vii ix

1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

.................................................................

1

..............................................................

2

...................................................................

3

2 Ring-Joint Gaskets 3 Spiral-Wound Gaskets

4 Jacketed Gaskets

Tables I Maximum Hardness for Ring Gaskets .................................................. 2 Ring Gasket Markings ................................................................ 3 Type R Ring Gasket Dimensions and Tolerances ....................................... 4 Pipe Sizes for Type R Ring Gaskets Suitable for Referenced Standards .................. 5 Type RX Ring Gasket Dimensions and Tolerances ..................................... 6 Pipe Sizes for Type RX Ring Gaskets Suitable for Referenced Standards ................ 7 Type BX Ring Gasket Dimensions and Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Pipe Sizes for Type BX Ring Gaskets Suitable for Referenced Standards ................ 9 Dimensions for Spiral-Wound Gaskets UsedWithASMEB16.5 Flanges ................. I O Dimensions for Spiral-Wound Gaskets UsedWithASMEB16.47 Series A Flanges ...... 1 1 Dimensions for Spiral-Wound Gaskets UsedWithASME B 16.47 Series B Flanges ....... 12 Inner-Ring InsideDiameters for Spiral-Wound Gaskets .................................. 13 Inner-Ring Inside Diameters for Spiral-Wound Gaskets Used BetweenASME B16.47 Series A Flanges ............................................................ 14 Inner-Ring Inside Diameters for Spiral-Wound Gaskets Used BetweenASME B 16.47 Series B Flanges ............................................................ 15 MinimumPipeWall Thickness Suitable for Use of Spiral-Wound Gaskets With Inner Rings for ASME B 16.5 Flanges ............................................... 16MaximumBoreofASME 816.5 Flanges forUseWith Spiral-Wound Gaskets . . . . . . . . . . . 17 MaximumBore ofASME B 16.47 Series A Flanges for UseWith Spiral-Wound Gaskets .............................................................. 18 MaximumBore ofASME B 16.47 Series B Flanges for UseWith Spiral-Wound Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Color Coding and Abbreviations for Spiral-Wound Gasket Materials ..................... 20Example Markings for Spiral-Wound Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Jacketed Gasket Dimensions for ASMEB16.5 Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Jacketed Gasket Dimensions for ASMEB16.47 Series A Flanges ....................... 23 Jacketed Gasket Dimensions for ASMEB16.47 Series B Flanges ....................... 24 Abbreviations for Identifying Materials for Jacketed Gaskets ............................ 25 Example Markings for Jacketed Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi


III

1 2 4 7 10 12 13 14 16 18 20 21

22

23 24 25 26 27 28 29 30 31 32 33 33

S T D - A S M E BLb.20A-ENGL

2000 S 0757b70 O b L 7 b B L 3 T q I

Mandatory Annex I References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

35

Nonmandatory Annex A Quality System Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37


STDOASME BIb.20A-ENGL 2000 I0757b70 ObL7b82 230 I

ASME B16.20a-2000

METALLIC GASKETS FOR PIPE FLANGES Ring-Joint, Spiral-Wound, and Jacketed

TABLE 1 MAXIMUM HARDNESS FOR RING GASKETS

1 SCOPE

1.1 General

Maximum Hardness

This Standard covers materials, dimensions, tolerances, and markings for metal ring-joint gaskets, spiralwound metal gaskets, metal-jacketed gaskets, and filler material. These gaskets are dimensionally suitable for use with flanges described in reference flange standards ASME B 16.5, ASME 816.47, and API Specification 6A. This Standard covers spiral-wound metal gaskets and metal-jacketed gaskets for use with raised-face and flat-face flanges.

Ring Gasket Material

Soft iron (1)

Low-carbon steel 4-6 chrome ' / 2 M ~

Type 410 Type 304 Type 316 Type 347

Brinell

Rockwell "B" Scale

90

56 68 72 86

120 130 170 160

160 160

83 83 83

NOTE: (1) May be low-carbon steel, not to exceed m a x i m u m hardness of 90 Brinell-56 Rockwell "B."

1.2 Quality Systems Requirements relating to the product manufacturers' quality system programs are described in AnnexA.

It is recommended that ring-joint gaskets be of a lesser hardness thanthatof the mating flanges.

1.3References

2.3.2 Hardness. Ring-joint gaskets of materials listed in Table I shallhave a hardness equal to or less thanthat shown in Table I .

Standards and specifications adopted by reference in this Standard areshown in Annex I, whichispart of this Standard.

2.4 Marking The outer surface of each gasketshallcarrythe manufacturer's name or identification trademark and gasket number prefixed by the letters R, RX, or BX followed by the gasket material identification. Materials shall be identified as shown in Table 2. The gasket shall also be marked with an ASME B 16.20 designation. The markingshall be applied so as nottoharmfully distort the gasket or affect the integrity of the seal.

2 RING-JOINT GASKETS 2.1 Types Ring-joint gaskets shall be either octagonal or oval in cross section.

2.2 Size

2.5 Dimensions and Tolerances

Ring-joint gaskets shall be identified byanR, RX, or BX number that relates to flange size (NPS), pressure class, and the appropriate flange standards (ASME B 16.5, ASME B 16.47, or API Specification 6A).

Dimensions and tolerances for ring-joint gaskets shall be as shown in Tables 3 through 8.

2.6 SurfaceFinish 2.3 Materials

Types R and R X gaskets shallhave a finish not rougher than 63 p i n . roughness. Type BX gaskets shall have a finish not rougher than 32 pin. roughness. Surface finishesshallpertaintothe gasket-sealing surfaces.

2.3.1 General. Ring-joint gasket materials, some of which are listed in Table 1 , shallbe selected by the user based on suitability for the service conditions. I


STD-ASME B L b - Z O A - E N G L 2000 I0757b70 O b L 7 b 8 1 L77

METALLIC GASKETS FOR PIPE FLANGES

A S M E B16.20a-2000

TABLE 2 RING GASKET MARKINGS RingGasket

Material

Identification

iron 12) Low-carbon steel 4-6 chrome Y2Mo Soft

Type 410 Type 304 Type 3 16 Type 347

Marking Example (1)

D

R51D

S

R51S

F5 (3) S 410 S 304 S 316 S 347

R51F5

R51S410 R51 S304

R51S316 R51S347

NOTES: ( 1 ) This n u m b e r shall he preceded by t h e manufacturer's

name or identification trademark. ( 2 ) M a y be l o w - c a r b o n steel, not t o exceed m a x i m u m hardness of 90 Brinell-56 Rockwell "B." (3) F5 identification designates ASTM Specification A 18272 chemical composition requirements only.

2.7 Identification Number Dimensionalreferenceidentificationnumbers are assignedtoring-jointgasketsandareshown in Tables 3 through 8.

3 SPIRAL-WOUND GASKETS 3.1 Size and Class

Spiral-wound gaskets, includingcenteringringand inner ring (paras. 3.2.4and 3 . 2 5 ) . areidentified by flangesize (NPS), pressureclass.andtheappropriate flangestandard (ASME B 16.5 or A S M E B 16.37).

3.2 Dimensions and Tolerances 3.2.1 General. Dimensionsandtolerancesforspiral-wound gaskets, centering rings, and inner rings shall be i n accordancewith Tables 9 thr-ough I I and as specified i n thissection. 3.2.2 Construction. Spiral-woundgasketsshall be constructed as alternateplies (circular layerscounted as revolutions) of preformed metal windings and plaint fillersthatarespirally wound. For thefinished gasket, thefillershallbeessentiallyflushwith.butnotbelow, themetalwinding on bothcontactfacesofthegasket. The metal strip i n thewindingshallbe 0.006 in. to 0.009 in. thick. The fillermatet-ia1 thickness shall be determined by themanufacturer. 3.2.3 Metal Joining. Theinnerwindingsshall have a minimum of threepliesofpreformedmetal strip withoutfiller. The initialtwopliesshall be spotwelded circumferentially with a minimum of three weldsspacedat a maximumdistance of 3 in. The


outer windings.whichshallhave a minimumofthree plies of preformedmetalwithoutfiller,shallbc spotwelded circumferentially with a minimum of three welds,thelast of whichshallbetheterminalweld. The distance of the first weld from the terminal weld shallbeno greater than1.5 in. Up to four additional loose preformedmetalwindingsbeyondtheterminal weldmaybeusedtoretainthegasket into the centeringring.

3.2.4 CenteringRing. All spiral-wound gaskets shall be furnished assembled into a centering ring. The centeringringthickness chal1 be from 0.1 17 in. to 0.1 3 1 in.andsuitablygroovedontheinside diameter so astoretainthc gasket. 3.2.5 Inner Ring. Innerringsshall be furnished (a) withall spiral-wound gasketshavingPTFE(polytetrafluoroethylcne)fillermaterial. It isrecommendedthat inner rings be specified by the user for flexible graphite and other filler materials (if appropriate for flanges and bore sizes used), particularly wJhere experience has demonstratedinwardbucklingofthegaskets to be a problem. Inner rings shall be furnished in spiral-wound gasketsforflanges NPS 24 andlarger in Class 900, NPS 12 andlarger in Class 1 SOO, andNPS 4 and larger i n Class 2500. Gaskets withinnerringsshould be used only with socket welding, lapped, welding neck,andintegralflanges. Thc inner-ringthicknessshall befrom 0.1 17 in. to O. I3 I i n . Tables I2through I4 showinner-ringinside diameters that may extend a maximum of 0.06 in. into theflangeboreundertheworstcombinationofflange bore.eccentricinstallation,andtolerance.Reference Table IS for minimum pipe wall thickness for use with gasketswith inner rings.Reference Tables 16, 17, and 18 formaximumallowableboreforusewith gaskets withoutinnerrings. 3.2.6 Gasket Compression. Spiral-wound gaskets NPS NPS and NPS 1 in Classes 150. 300, and 600 shall be designed so that a uniformboltstress of 25,000psi,basedonthcnominalboltroot diameter, will compress thegasketto a thickness of 0.130 in. +O.OOS in. All othergasketsizesandclassesshallbe designed so that a uniformboltstressof30.000psi will compress thegasketto a thickness of 0.130 in. *0.005 in.

v?,

'/',

3.3 Materials Metal windings and filler materials shall be in accordance with Table 19. The inner ring shall be of a material

,

ASME B16.20a-2000


thathascorrosionresistantcharacteristicsequivalentto orbetterthanthat of the metal winding. The centering ring may be carbonsteel that ispainted,metalplated, or otherwisecoated to inhibit atmosphericcorrosion.

2. I


S T D O A S M EB L b - 2 0 A - E N G L

m

ZOOU

0757b70 O b 1 7 b d 5 TLiT

m

B16.20a-2000 GASKETSASME METALLIC FLANGES FOR PIPE

TABLE 12 INNER-RING INSIDE DIAMETERS FOR SPIRAL-WOUND GASKETS

(a)

~~

Flange Size (NPSI '12 3

14

1

2.19

5.19 6.19 10.56 12.50

15.75 17.69 19.69

1 1'/4 1'/z 2 2'/2 3 4 5 6 8 10 12 14 16 18 20 24

Pressure Class 150

300

400 (1)

600 900

Il, 2) 1500 (2,

0.56 0.81 .O6 1.50 1.75

0.56 0.81 1.O6 1.50 1.75

...

0.56 0.81 1.O6 1.50 1.75

... ...

2.19 2.62 3.19 4.19 5.19

...

4.04 5.05

2.19 2.62 3.10 4.04 5.05

.. .

2.62 3.19 4.19

13.75

6.19 8.50 10.56 12.50 13.75

6.10 8.10 10.05 12.10 13.50

23.75

15.75 17.69 19.69 23.75

15.35 17.25 19.25 23.25

8.50

... ...

... ... ... ...

3)

2500 (1-31

0.56 0.81 1.O6 1.31 1.63

0.56 0.81 1.O6 1.31 1.63

3.10 4.04 5.05

2.06 2.50 3.10 3.85 4.90

2.06 2.50 3.10 3.85 4.90

6.10 8.10 10.05 12.10 13.50

6.10 7.75 9.69 11.50 12.63

5.80 7.75 9.69 11.50 12.63

5.80 7.75 9.69 11.50

15.35 17.25 19.25 23.25

14.75 16.75 19.00 23.25

14.50 16.75 18.75 22.75

...

... ... ...

...

...

... ... ...

GENERAL NOTES: (a) The inner-ring thickness shall be 0.117 in. t o 0.131 in. (b) For sizes NPS 1'/4 through NPS 3, the inside diameter tolerance is20.03 in.; for larger sizes the inside diameter tolerance is k0.06 in. See Table 15 for minimum pipe wall thicknesses that are suitable for use with standard inner rings. NOTES: (1) There are no (a) NPS '12 through NPS 3 Class 400 flanges; therefore, use Class 600 flanges (b) NPS 72 through NPS 2'/2 Class 900 flanges; therefore, use Class 1500 flanges (c) NPS 14 and larger Class 2500 flanges (2) Inner rings are required for Class 900, NPS 24 gaskets; Class 1500, NPS 12 through NPS 24 gaskets; and Class 2500, NPS 4 through NPS 12 gaskets. (3) Refer t o para. 3.2.5 for required use of inner rings.

21


FLANGES FOR PIPE

ALLIC B16.20a-2000 ASME

TABLE 13 INNER-RINGINSIDEDIAMETERS FOR SPIRAL-WOUND GASKETS USED BETWEEN ASME B16.47 SERIES A FLANGES Flange

Pressure Class

Size WS)

150

300

400

600

900 (1, 2)

26 28 30 32 34 36

25.75 27.75 29.75 31.75 33.75 35.75

25.75 27.75 29.75 31.75 33.75 35.75

26.00 28.00 29.75 32.00 34.00 36.13

25.50 27.50 29.75 32.00 34.00 36.13

26.00 28.00 30.25 32.00 34.00 36.25

38 40 42 44 46 48

37.75 39.75 41.75 43.75 45.75 47.75

37.50 39.50 41.50 43.50 45.38 47.63

37.50 39.38 41.38 43.50 46.00 47.50

37.50 39.75 42.00 43.75 45.75 48.00

39.75 41.75 43.75 45.50

50 52 54 56 58 60

49.75 51.75 53.50 55.50 57.50 59.50

49.00 52.00 53.25 55.25 57.00 60.00

49.50 51.50 53.25 55.25 57.25 59.75

50.00 52.00 54.25 56.25 58.00 60.25

GENERAL NOTES: (a) The inner-ring thickness shall be 0.117 in. to 0.131 in. (b) The inside diameter tolerance is +0.12 in. (c) These inner rings are suitable for use with pipe walls 0.38 in. or thicker. NOTES: (1) Inner rings are required for Class 900 gaskets. (2) There are no Class 900 flanges NPS 50 and larger.

22


48.00 50.00

... ... ...

STD.ASME BLb.20A-ENGL

2000

m

0757b70 ObL7b87 812

m

B16.20a-2000 GASKETSASME METALLICFLANGES FOR PIPE

TABLE 14 INNER-RING INSIDE DIAMETERS FOR SPIRAL-WOUND GASKETS USED BETWEEN ASME 616.47 SERIES B FLANGES Flange Size

ure

25.75 27.75

35.75

26 28 30 32 34 36

37.75 39.75 41.75

38 40 42

31.75

44 45.75 47.75

88 1.88 4.25 5 44

49.75 51.75 53.25 56.00 58.19 60.44

29.75 33.75

43.75

46 48 50 52 53.75 54 56 58 60

25.75 27.75 29.75 31.75 33.75 35.75

25.75 27.63 29.63 31.50 33.50 35.38

25.38 27.00 29.63 31.25 33.50 35.50

26.25 28.25 30.75 33.00 35.25 36.25

38.25 40.25 42.75 44.25 46.38 48.50

37.50 39.38 41.38 43.50 46.00 47.50

37.50 39.75 42.00 43.75 45.75 48.00

39.75 41.75 43.75 45.50 48.00 50.00

...

...

... ... ...

53.75

...

GENERAL NOTES: (a) The inner-ring thickness shall be 0.117 in. to 0.131 in. (b) The inside diameter tolerance is ~ 0 . 1 2 in. (C) These inner rings are suitable for use with pipe walls 0.375 in. or thicker. NOTES: (1) Inner rings are required for Class 900 gaskets. Refer to para. 3.2.5 for required use of inner rings. (2) There are no NPS 50 and larger Class 900 flanges.

23


(al

STD-ASME B L b - Z O A - E N G L 2000 E D757b70 ObL7b88 757

GASKETS METALLIC ASME B16.20a-2000

(a)

m

FLANGES FOR PIPE

TABLE 15 MINIMUM PIPEWALLTHICKNESSSUITABLEFORUSEOFSPIRAL-WOUNDGASKETS WITH INNER RINGS FOR ASME B16.5 FLANGES Flange Size

Pressure Class

WS)

150

300

400

600

900

1500

2500

'12 "4

80

Schedule

1

1

1v 4 1'/2 2

Schedule 40

2

3

4 Schedule 80

5 6

8 10

12 14 16

Schedule 10s

Schedule 30

18 20

Schedule 80

1

24 GENERAL NOTES: (a) The pipe wall schedules identified represent the minimum recommended pipe wall thickness suitable for use with inner rings for ASME B16.5 flanges. (Reference ASME B36.10M and B36.19M.l (b) Gaskets with inner rings should be used only with socket welding, lapped, welding neck, and integral flanges.

24


STDeASME BLb.20A-ENGL

GASKETS METALLIC

2000 M 0759b70 Ob27689 h 9 5

m

FOR PIPE FLANGES

ASME B16.20a-2000

TABLE 18 MAXIMUM BOREOF ASME B16.47 SERIES B FLANGES FOR USE WITH SPIRAL-WOUND GASKETS Flange Size WS)

26 28 30 32 34 36 38 40 44 46 48 50 52 54 56

Pressure Class 150

300

400

600

900 111

Welding neck and integral flanges having maximum insidediameters as described in ASME 816.47

58

60 GENERAL NOTE: This table shows the maximum boreof flanges for which the spiral-wound gasket dimensions shown in Table 1 1 are recommended, considering the tolerances involved, the possibility of eccentric installation, and the possibility that the gasket may extend into the assembled flange bore. NOTES: (1) Inner rings are required for Class 900 gaskets, NPS 26 through NPS 48 (see para. 3.2.5). (2)There are no Class 900 flanges NPS 50 and larger.

27


S T D = A S M E BLb.20A-ENGL

2000 B 0 7 5 7 b 7 0 ObL?bSO 307

ALLIC B16.20a-2000 ASME

FOR PIPE FLANGES

(a)

TABLE 19 COLOR CODING AND ABBREVIATIONS FOR SPIRAL-WOUND GASKET MATERIALS Metallic Winding Materials Material

Abbreviation

Color Code

Carbon steel 304 SS 304 L SS

CRS 304 304 L

Silver Yellow No color

309 SS 310 SS 316 L SS 317 L SS

309 310 316 L 317 L

No color No color Green Maroon

347 SS 321 SS 430 SS

347 32 1 430

Blue Turquoise No color

Ni-Cu Monel 400 Grade 400

MON

Orange

NI TI

Nickel 200 Titanium 20Cb-3 alloy

A-20

Red Purple Black

Ni-Mo Hastelloy B Grade B2

HAST B

Brown

...

...

HAST C

Beige

Ni-Mo-Cr Hastelloy C Grade C-276 Ni-Cr-Fe lnconel 600 Grade 600

...

...

INC 600

Gold

...

Ni-Cr-Fe-Cb lnconel 625 Grade 625

INC 625

Gold

...

...

Ni-Cr-Fe-Ti lnconel X-750 Grade X-750

INX

No color

...

...

IN 800

White

Ni-Fe-Cr-Mo-Cu lncoloy 825 Grade 825

IN 825

White

Zirconium

ZlRC

No color

Ni-Fe-Cr lncoloy 800 Grade 800


STD-ASME B L b = Z O A - E N G L 2000 II 0759b70 O b L 7 b 7 L 243

ASME B16.20a-2000

MANDATORY ANNEX I REFERENCES

IS0 9000-1: 1994, Qualitymanagementand quality assurance standards - Part 1 : Guidelines for selection anduse I S 0 9000-2: 1997, Quality management and quality assurance standards - Part2: Generic guidelines for the application of IS0 9001, IS0 9002, and I S 0 9003 IS0 9000-3: 1997, Quality management and quality assurance standards - Part 3: Guidelines for the application of IS0 9001 to the development, supply, installation, and maintenance of computer software IS0 9001 : 1994, Quality systems - Model for quality assurance in design, development, production, installation, and servicing IS0 9002: 1994, Quality systems - Model for quality assurance in production, installation, and servicing IS0 9003: 1994, Quality systems - Model for quality assurance infinal inspection and test Publisher: International Organization for Standardization (ISO), 1 me de Varembé, Case postale 56, CH-I21 1 Genève 20, SwitzerlandSuisse

The following is a listof publications referenced in this Standard. API Specification 6A - 17th Edition - 1996, Specification for Valves andWellheadEquipment Publisher: American Petroleum Institute (API), 1220 L Street, NW, Washington, DC 20005 ASME B16.5-1996, Pipe Flanges and Flanged Fittings' ASME B 16.47-1996, Large Diameter Steel Flanges: NPS26throughNPS 60' ASME B36.10M-1996, Welded and Seamless Wrought Steel Pipe' ASME B36.19M-1985 (R1994), Stainless Steel Pipe' Publisher: American Society of Mechanical Engineers (ASME), Three ParkAve.,NewYork, NY 10016; Order Department: 22 Law Drive, Box 2300, Fairfield, NJ 07007

' May

also be obtained from the American National Standards Institute (ANSI), I I West 42nd Street, New York, NY 10036.

35


AMERICAN NATIONAL STANDARDS FOR PIPING. PIPE FLANGES. FITTINGS. AND VALVES Scheme for the Identification of Piping Systems........................................................... .A13.1.1996 Pipe Threads. General Purpose (Inch) ............................................................. B1.20.1-1983(R1992) DrysealPipeThreads(1nch) ...................................................................... B1.20.3-1976(R1998) Cast Iron Pipe Flanges and Flanged Fittings: Classes 25. 125. and 250 ........................................ ,816.1-1998 Malleable IronThreaded Fittings: Classes 150 and 300 ...................................................... .B16.3.1998 Gray Iron Threaded Fittings: Classes 125 and 250 .......................................................... .B16.4.1998 Pipe Flanges and Flanged Fittings(NPS 'h Through NPS 24) ................................................ .B16. 5-1996 Factory-Made Wrought Steel Buttwelding Fittings.......................................................... .B16. 9-1993 .B16.1 0-1992 Face-to-Face and End-to-End Dimensions of Valves ....................................................... Forged Fittings. Socket-Welding and Threaded ............................................................ .816.1 1-1996 Castlron Threaded Drainage Fittings ..................................................................... 616.12-1998 Ferrous Pipe Plugs. Bushings. and Locknuts with Pipe Threads ............................................. .B16.14.1991 Cast Bronze Threaded Fittings:Classes 125 and 250 ................................................. B16.15-1985(R1994) Cast Copper Alloy Solder Joint Pressure Fittings .................................................... B16.18-1984(R1994) .B16.20.1998 Metallic Gaskets for Pipe Flanges:Ring.Joint. Spiral-Wound. and Jacketed................................... Nonmetallic Flat Gaskets for Pipe Flanges................................................................ .B162 1.1992 Wrought Copper andCopper Alloy Solder Joint Pressure Fittings ........................................... .B16.2 2.1995 D W .................................................. ,816.23-1992 Cast Copper Alloy Solder Joint Drainage Fittings Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150. 300. 400. 600. 900. 1500. and 2500 .... B16.24-1991(R1998) B16.25-1997 Buttwelding Ends ....................................................................................... Cast Copper Alloy Fittings for Flared Copper Tubes....................................................... .B1626.1988 Wrought Steel Buttwelding Short Radius Elbows and Returns .............................................. .B16.28.1994 .B16.2 9-1994 Wrought Copper and Wrought Copper Alloy Solder Joint Drainage Fittings D W .......................... Manually Operated Metallic Gas Valves for Use in Gas Piping Systems up to 125 psig .B16.33-1990 (Sizes Through 2) ............................................................................... Valves - Flanged. Threaded. and Welding End........................................................... .816.3 4-1996 Orifice Flanges ......................................................................................... 816.36-1996 Large Metallic Valves for Gas Distribution (Manually Operated. NPS 2l/* to 12. 125 psig Maximum) ...... B16.38-1985(R1994) ,816.39-1998 Malleable Iron Threaded Pipe Unions .................................................................... Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems . . . . . . . . . . . . . . . .B16.40-1985(R1994) ,816.42-1998 Ductile Iron Pipe Flanges and Flanged Fittings. Classes 150 and 300 ........................................ Manually Operated Metallic Gas Valves for Use in House Piping Systems ................................... .B16.44.1995 Cast Iron Fittings forSoventa Drainage Systems.......................................................... .816.45-1998 .B16.4 7-1996 Large Diameter Steel Flanges(NPS 26 Through NPS 60) ................................................... Steel Line Blanks ....................................................................................... B16.48-1997 Factory-Made Wrought Steel Buttwelding Induction Bends for Transportation and DistributionSystems . . . . . . . . .B16.4 9.2000 Power Piping............................................................................................ 831.1-1998 .B31.2.1968 Fuel Gas Piping (not an ANSI standard) ................................................................... Process Piping .......................................................................................... 831.3-1999 Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids .................................. .B31.4.1998 Refrigeration Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 831.5-1992 ......................................................... .831.8.1999 Gas Transmission and Distribution Piping Systems Building Services Piping................................................................................. .831.9-1996 831.11-1989 Slurry TransportationPiping Systems..................................................................... .B316.1991 Manual for Determining the Remaining Strength of Corroded Pipelines...................................... Welded and Seamless Wrought Steel Pipe.............................................................. B36.10M-1996 StainlessSteel Pipe ............................................................................ B36.19M-l985(R1994) Self-operated and Power-Operated Safety-Related Valves Functional Specification Standard . . . . . . . . . . . . .N278. 1.1975(R1992)

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The American Society of Mechanical Engineers

A N

A M E R I C A N N A T I O N A L S T A N D A R D

METALL E I GASKETS FOR P P IEFLANGES Ring-Joint, Spiral-Wound, and Jackeltd

ASME B16.20-1MM8 (Revision01 ASME B18.20-1993)


Date of Issuance: April 28, 2000

The 1998 edition of this Standard is beingissued with an automatic addenda subscription service. The use of addenda allows revisions made in response to public review comments or committee actions to be published on a regular yearly basis; revisions published in addenda will become effective 6 months after the Date of Issuance of the addenda. The next edition of this Standard is scheduled for publication in 2003.

ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard. The interpretations will be included with the above addenda service.

ASME is the registered trademark of The American Society of Mechanical Engineers.

This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment that providesan opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large. ASME does not “approve,” “rate,“ or “endorse’’ any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rightsasserted in connection with any items mentioned in thisdocument, and does not undertake to insure anyone utilizing a standard against liabilityfor infringement any of applicable letters patent, nor assumes any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this codeor standard. ASME accepts responsibility for only those interpretations issued in accordance with established ASME procedures and policies, which precludes the issuance of interpretations by individuals.

No part of this document maybe reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of thepublisher.

The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990

Copyright Q 2000 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.


Ring-joint gaskets andgroovesprobably originated in theboilerfield,wheretheywere used in various forms formanholecovers, autoclaves, and other closures; however, it was in the oil industry (both in the production and refining of oil) that they received the greatest recognitionandweredevelopedintotheirpresent form.Their useexpanded steadily as temperatures and pressures were increased in steam plants. Tests examining their application in flangesand valves wereconducted as early as 1928. In June 1936,theAmericanPetroleum Institute (API) issued TentativeStandard5-G-3 on Ring-Joints for Steel Flanges and Flange Unions for usewithAPI Tubular Goods. This standard wasknown as API Specification 6B, Ring-Joint Flanges. Following the acceptance of ring-joints for flanges and valves byAPIandthe issuance of their standard, ASAB16e on Steel Pipe Flanges andFlangedFittingswasrevised to includethem,andthe 1939 edition includedstandard dimensions for a full line ofring-jointflangesbasedontheAPI standard. Developmentwork continued, andAPI formulated Standard 6E, Specification for WellheadEquipment,whichincludedring-jointsnotcovered in ASA B16e-1939. In 1949, the American Standards Association (ASA), Sectional Committee B16, Subcommittee3,SteelFlangesandFlangedFittings,assembled the available informationonring-joint gaskets into a single standard. ASA approvalwasgrantedonApril30,1952,withthe designation ASA B 16.20-1 952. Ring gaskets for Class 900 (900 lb at that time) in sizes NPS 26 through 36 were added, andASA approvalwasgrantedonApril30,1952. An updatedversionwas submitted, andASAapprovalwasgrantedonApril 4, 1955, with the designation ASA B 16.20-1955. The standardwasreviewed,andreaffirmation approvalwasgranted by theASAonApril25,1963. The standardwasreviewed,andreaffirmationapprovalwasgranted by theAmerican National Standards Institute (ANSI) on April 25, 1973, with the designation of an American National Standard. API requested that ASME convert their gasket standard, API 601, into an ASME American National Standard. As a result of that request, this edition wasexpanded to include requirements for spiral-woundand jacketedgaskets thatwereformerlylisted in API 601, 7th edition, 1988. Also, ring-joint groove dimensions are not included in this edition because they are included in ASMWANSI B 16.5-1988,titledPipeFlangesandFlanged Fittings, andASME B16.47-1990, titledLargeDiameterSteelFlanges. The 1993 edition wasapproved by the BI6 StandardsCommittee. Following approval by ASME,approval byANSIwas given on January22,1993,withthe designation ASME B16.20-1993. In the1998 edition ofASME B 16.20, reference standards are updated, a qualitysystem program annex is added, innerringinside diameters for spiral-woundgaskets are revised, andseveral editorial revisionsaremade.Followingapproval by ASME BI6 Subcommittee B andtheB16Main Committee, ANSI approved thisAmericanNational Standard on November 20, 1998. Requests for interpretations or suggestions for revisionshould be sentto The American Society of Mechanical Engineers; Secretary, BI6 Committee;Three Park Avenue, New York, NewYork 1 0 0 1 6-5990.

...

111


ASME B16 COMMITTEE Standardization of Valves, Flanges, Fittings, Gaskets, and Valve Actuators (The following is the roster of the Committee at the timeof approval of this Standard.)

OFFICERS W. N. McLean, Chair

R. A. Schmidt, Vice Chair P. A. Reddington, Secretary

COMMITTEE PERSONNEL W. L. Ballis, Consultant, London, Ohio R. W. Barnes, Anric Enterprises, Etobicoke, Ontario, Canada R. R. Brodin, Fisher Controls International, Inc., Marshalltown, Iowa M. A. Clark, Nibco, Inc., Elkhart, Indiana A. Cohen, A. Cohen and Associates, Albuquerque, New Mexico C. E. Floren, Mueller Co., Decatur, Illinois D. R. Fríkken, Solutia, Inc., St. Louis, Missouri R. Henrich, Minnegasco, Inc., Golden Valley, Minnesota J. C. Inch, Mueller Refrigeration Products Co., Hartsville, Tennessee G. A. Jolly, Vogt Valve Co., Louisville, Kentucky W. G. Knecht, BW/IP International, Inc., Williamsport, Pennsylvania R. Koester, The William Powell Co., Cincinnati, Ohio W. N. McLean, Newco Valves, Palos Park, Illinois M. L. Nayyar, Bechtel Power Corp., Gaithersburg. Maryland P. A. Reddington, American Society of Mechanical Engineers, New York, New York R. A. Schmidt, Trinity-Ladish Co., Russellville, Arkansas H. R. Sonderegger, Grinnell Corp., Cranston, Rhode Island W. M. Stephan, Flexitallic, Inc., Mount Laurel, New Jersey T. F. Stroud, Ductile Iron Pipe Research Association, Birmingham, Alabama M. D. Wasicek, ABS Americas, Houston, Texas R. E. White, Richard E. White and Associates, South Bend, Indiana D. A. Williams, Southern Company Services, Birmingham, Alabama L. A. Willis, The Dow Chemical Co., Freeport, Texas W. R. Worley, Union Carbide Corp., South Charleston, West Virginia

SUBCOMMITTEE G - GASKETS FOR FLANGED JOINTS W. M. Stephan, Chair, Flexitallic, Inc., Mount Laurel, New Jersey C. B. Gillis, Vice Chair, Lamons Gasket Co., Houston, Texas B. P. Feder, Secretary, American Society of Mechanical Engineers, New York, New York K. A. Benton, Leader Gasket, Inc., Houston, Texas W. E. Holden, Solutia, Inc., Alvin, Texas D. H. Monroe, Consultant, Birmingham, Alabama R. T. Mueller, ExxonMobil Research and Engineering Co., Florham Park, New Jersey D. F. Reid, Garlock Metallic Gasket Division, Houston, Texas J. Tzeng, Ucar Carbon Co., Inc., Parma, Ohio W. R. Worley, Union Carbide Corp., South Charleston, West Virginia


CORRESPONDENCE WITH THE B16 COMMllTEE

General. ASME Standards aredevelopedandmaintainedwiththeintenttorepresentthe consensus of concernedinterests. As such, usersofthisStandardmayinteractwiththe Committee by requesting interpretations, proposingrevisions,andattending Committee meetings. Correspondence shouldbeaddressed to:

Secretary, B 16 Main Committee The American Society of MechanicalEngineers Three Park Avenue New York, NY 10016-5990 Proposing Revisions. Revisions are madeperiodicallytothe Standard toincorporate changes that appear necessary or desirable, as demonstrated by the experience gained from theapplication of the Standard. Approvedrevisionswill be published periodically. The Committee welcomes proposals for revisions to this Standard. Such proposals should be as specific as possible, citing theparagraphnumber(s), the proposedwording,and a detailed description of the reasons for the proposal, including any pertinent documentation. Interpretations. Uponrequest,the BI6 Committeewillrenderaninterpretationofany requirement ofthe Standard. Interpretationscanonlyberendered in response to a written requestsenttothe Secretary of the B 16 MainCommittee. The request for interpretation should be clear and unambiguous. It is further recommended that the inquirer submit hidher requestinthefollowingformat:

Subject: Edition:

Cite the applicable paragraph number(s) and the topic of the inquiry. Cite the applicable edition the of Standard for which the interpretation isbeingrequested. Question: Phrase the question as a request for interpretation an of a specific as a request requirement suitable for general understanding and use, not for anapproval of a proprietarydesign or situation. The inquirer may also includeanyplans or drawings, whicharenecessary to explain the question; however,theyshouldnotcontainproprietarynamesor information. Requeststhatarenot in this format willbe rewritten in this format by theCommittee prior to being answered, whichmayinadvertentlychangetheintentoftheoriginalrequest. ASMEproceduresprovideforreconsiderationofanyinterpretationwhenor if additional informationthatmight affect an interpretationis available. Further, personsaggrieved by an interpretation may appealtothe cognizant ASME Committee or Subcommittee. ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity. Attending Committee Meetings. The B I 6 Main Committee regularly holds meetings, which are opentothepublic.Personswishing to attendanymeetingshould contact the Secretary ofthe BI6 Main Committee.


IMPORTANT INFORMATION CONCERNING USE OF ASBESTOS OR ALTERNATIVE MATERIALS

Asbestosisreferenced for use as a fillermaterial in metallic gaskets. It hasserved as a universalsealingmaterial, compatible withmostfluid services. It hasbeenof extreme usefulness in minimizingfire hazards. Certain serious adverse health effects are associated with asbestos, among them the serious and often fatal diseases of lung cancer, asbestosis, and mesothelioma (a cancer of the chest andabdominal linings). The degree of exposure toasbestosvarieswiththeproductand theworkpracticesinvolved. ConsultthemostrecenteditionoftheOccupationalSafetyandHealthAdministration, US. Department of Labor, Occupational Safety and Health Standard for Asbestos, Tremolite, Anthophyllite,andActinolite, 29 Code of FederalRegulationsSection 1910.1001; the U.S. EnvironmentalProtectionAgency,NationalEmissionStandard for Asbestos, 40 Code of FederalRegulations Sections 61.I40 through 61.156; andtheproposedrule by the U.S. EnvironmentalProtectionAgencyproposinglabelingrequirementsandphasedbanning of asbestosproducts,publishedat 51 FederalRegister 3738-3759 (January 29,1986). There are currently in useandunderdevelopment a number of substitute materials to replace asbestos in certain applications. Manufacturers and users are encouraged to develop anduse effective substitute materialsthatcanmeetthe specifications for, and operating requirements of, theequipmenttowhichtheywouldapply. Informationconcerningsafetyandhealthrisksandproperprecautions with respect to particular materials and conditions should be obtained from one’s employer, the manufacturer or supplier ofthatmaterial, or theMaterialSafetyData Sheet.


CONTENTS

Foreword ................................................................................. Committee Roster .......................................................................... Correspondence With the B I6 Committee .................................................... Important Information Concerning Use of Asbestos or Alternative Materials ..................... 1 Scope

...............................................................................

V

vii

ix 1

.................................................................

1

..............................................................

2

...................................................................

3

2 Ring-Joint Gaskets

3 Spiral-Wound Gaskets

4 Jacketed Gaskets

...

111

Tables 1 Maximum Hardness for Ring Gaskets .................................................. 2 Ring Gasket Markings ................................................................ 3 Type R RingGasketDimensionsand Tolerances ....................................... 4 Pipe Sizes for TypeR Ring Gaskets Suitable for Referenced Standards .................. 5 Type RX RingGasketDimensionsand Tolerances ..................................... 6 Pipe Sizes for Type RX Ring Gaskets Suitable forReferenced Standards ................ 7Type BXRingGasketDimensionsand Tolerances ..................................... 8 Pipe Sizes for Type BX Ring Gaskets Suitable for Referenced Standards ................ 9 DimensionsforSpiral-Wound Gaskets UsedWithASME B16.5 Flanges ................. 10 DimensionsforSpiral-Wound Gaskets UsedWithASMEB16.47 Series A Flanges ...... 11 Dimensionsfor Spiral-WoundGaskets UsedWithASMEB16.47 Series BFlanges ....... 12Inner-RingInsideDiametersforSpiral-Wound Gaskets .................................. 13 Inner-Ring InsideDiameters for Spiral-Wound Gaskets UsedBetweenASME B 16.47 Series A Flanges ............................................................ 14 Inner-RingInsideDiametersforSpiral-Wound Gaskets UsedBetweenASME B16.47 Series B Flanges ............................................................ 15 MinimumPipeWall Thickness Suitable for UseWithInnerRings for ASME B 16.5Flanges ............................................................... 16MaximumBore ofASME B 16.5Flanges for UseWith Spiral-WoundGaskets ........... 17 MaximumBore of ASME 816.47 Series AFlanges for UseWith Spiral-Wound Gaskets .............................................................. 18 MaximumBore ofASME B 16.47 Series B Flanges for UseWith Spiral-WoundGaskets .............................................................. 19 Color CodingandAbbreviationsfor Spiral-WoundGasket Materials ..................... 20 ExampleMarkings for Spiral-WoundGaskets ........................................... 21 Jacketed GasketDimensions for ASMEB16.5Flanges .................................. 22 JacketedGasket DimensionsforASME B 16.47 Series A Flanges ....................... 23Jacketed GasketDimensionsforASME B 16.47 Series B Flanges ....................... 24 Abbreviations for Identifying Materials for JacketedGaskets ............................ 25 ExampleMarkingsforJacketed Gaskets ............................................... xi


1 2 4 7

IO 12 13 14 16 18

20 21 22

23 24 25

26 27 28 29 30

31 32 33 33

Mandatory Annex I References ...........................................................................

35

Nonmandatory Annex A Quality System Program

37

..............................................................


ASME 816.20-1998

METALLIC GASKETS FOR PIPE FLANGES Ring-Joint, Spiral-Wound, and Jacketed

TABLE 1 MAXIMUM HARDNESS FOR RING GASKETS

1 SCOPE 1.1 General

Maximum Hardness

This Standard covers materials, dimensions, tolerances, and markings for metal ring-joint gaskets, spiralwound metal gaskets, metal-jacketed gaskets, and filler material. These gaskets are dimensionally suitable for use with flanges described in reference flange standards ASMEB16.5,ASME B16.47, and APISpecification 6A. This Standard covers spiral-wound metal gaskets and metal-jacketed gaskets for use with raised-face and flat-faceflanges.

Ring Gasket Material

Brinell

Rockwell "B" Scale

Soft iron (1) Low-carbon 68 steel 4-6 chrome SiMo Type 86 410 Type 304 Type 316 Type 347

90 120 130 170 160 160 160

56 72 83 83 83

NOTE: ( 1 ) May be low-carbon steel, not t o exceed maximum hardness of 90 Brinell-56 Rockwell "B."

1.2 Quality Systems Requirements relating to the product manufacturers' qualitysystem programs are described in Annex A.

It is recommended that ring-joint gaskets be of a lesser hardness than that of the mating flanges.

1.3References

2.3.2Hardness. Ring-joint gaskets of materials listed in Table 1 shall have a hardness equal to or lessthanthat shown in Table 1.

Standards and specifications adopted by reference in this Standard are shown in Annex I, which is part of this Standard.

2.4 Marking The outer surface of each gasket shall carry the manufacturer's name or identification trademark and gasket number prefixed by the letters R, RX, or BX followed by the gasket material identification. Materials shall be identified as shown in Table 2. The gasket shall also be marked with anASME B 16.20 designation. The marking shall be applied so as notto harmfully distortthe gasket or affect the integrity of the seal.

2 RING-JOINT GASKETS 2.1 Types Ring-joint gaskets shall be either octagonal or oval

in cross section. 2.2 Size

2.5 Dimensions and Tolerances

Ring-joint gaskets shall be identified byanR,RX, or BX number that relates to flange size (NPS), pressure class, and the appropriate flange standards (ASME 816.5, ASME B16.47, or API Specification 6A).

Dimensions and tolerances for ring-joint gaskets shall be as shown in Tables 3 through 8.

2.6 SurfaceFinish

2.3 Materials

Types R andRX gaskets shallhave a finishnot rougher than 63 Fin. roughness. Type BX gaskets shall have a finish not rougher than 32 Fin. roughness. Surface finishesshallpertaintothe gasket-sealing surfaces.

2.3.1 General. Ring-joint gasket materials, some of which are listed in Table I , shall be selected by the user based on suitability for the service conditions. I



ASME 816.20-1998

TABLE 2 RINGGASKET MARKINGS Ring Gasket Material

Soft iron (2) Low-carbon steel 4-6 chrome '/zMo Type 410 Type 304 Type 316 Type 347

outer windings, which shall have a minimum of three plies of preformedmetalwithoutfiller,shall be spotwelded circumferentially with a minimum of three welds,the last ofwhichshallbetheterminalweld. The distance of the first weld from the terminal weld shallbeno greater than 1.5 in. Up to four additional loosepreformed metal windingsbeyond the terminal weldmaybeused to retain the gasket into the centeringring.

Identification Marking Example (1)

D S F5 (3) R51S410 S 410 R51S304 S 304 R51S316 S 316 S347 R51 S 347

R51D R51S R51F5

NOTES: (1)Thisnumbershallbepreceded by the manufacturer's name or identification trademark. (2) May be low-carbon steel, not to exceed maximum hardness of 90 Brinell-56 Rockwell "B." (3) F5 identification designates ASTM Specification A 18272 chemical composition requirements only.

3.2.4Centering Ring. All spiral-wound gaskets shall be furnished assembled into a centering ring. The 0.1 17 in. to centeringringthicknessshallbefrom O. 13 I in. and suitably grooved on the inside diameter so as toretain the gasket. 3.2.5 InnerRing. Innerringsshallbefurnished withallspiral-wound gaskets having PTFE (polytetrafluoroethylene)fillermaterial.It is recommendedthat inner rings be specified by the user for flexible graphite and other filler materials (if appropriate for flanges and bore sizes used),particularlywhere experiencehas demonstratedinwardbuckling ofthe gaskets to be a problem. Inner rings shall be furnished in spiral-wound gaskets forflanges NPS 24 and larger in Class 900, NPS 12 andlarger in Class 1500, and NPS 4 and larger in Class 2500. Gaskets withinnerringsshould beusedonlywithsocketwelding,lapped,welding neck,andintegralflanges. The inner-ringthicknessshall be from 0.1 17 in. to O. 13 I in. Tables 12 through 14 show inner-ring inside diameters that may extend a maximum of 0.06 in. into theflangeboreundertheworstcombinationofflange bore, eccentric installation, andtolerance.

2.7 IdentificationNumber Dimensional reference identification numbers are assigned to ring-joint gaskets andareshown in Tables 3 through 8.

3 SPIRAL-WOUND GASKETS 3.1 Sizeand Class Spiral-wound gaskets, includingcenteringringand innerring(paras. 3.2.4 and 3.2.5), areidentified by flangesize (NPS), pressure class, andtheappropriate flange standard (ASME B16.5 or ASME B 16.47).

3.2 DimensionsandTolerances 3.2.1 General. Dimensionsandtolerances for spiral-wound gaskets, centering rings, and inner rings shall be in accordance with Tables 9 through I 1 and as specifiedinthissection.

3.2.6 Gasket Compression. Spiral-wound gaskets NPS y!, NPS and NPS 1 in Classes 150, 300, and 600 shallbedesigned so that a uniformbolt stress of 25,000 psi,basedonthenominalboltroot diameter, will compress the gasket to a thickness of 0.130 in. k0.005 in. All other gasket sizes and classes shall be designed so that a uniformbolt stress of 30,000 psi will compress thegasketto a thickness of O. 130 in. .c0.005 in.

v4,

3.2.2 Construction. Spiral-wound gaskets shall be constructed as alternate plies (circular layerscounted as revolutions) of preformed metal windings and plaint fillersthat are spirally wound. For thefinished gasket, the filler shall be essentially flush with, but not below, the metal winding on both contact faces of the gasket. The metal strip in thewindingshallbe 0.006 in. to 0.009 in.thick. The fillermaterialthicknessshallbe determined by themanufacturer.

3.3 Materials Metal windings and filler materials shall be in accordance with Table 19. The inner ring shall be of a material that has corrosion resistant characteristics equivalent to or better than that of the metal winding. The centering ringmaybecarbonsteelthatispainted,metalplated, or otherwise coatedtoinhibit atmospheric corrosion.

3.2.3 Metal Joining. The innerwindingsshall have a minimumofthreepliesofpreformedmetal be spotstrip withoutfiller. The initialtwopliesshall weldedcircumferentiallywith a minimum of three weldsspacedat a maximumdistance of 3 in. The 2


ASME B16.20-1998


3.4 Marking

4.2 Design

3.4.1 General. The centering ring of each spiralwound gasket shallbepermanentlymarked. The letteringheight shall be a minimum of 0.1 in. The following information shall be included with the centeringringmarkings: ( a ) Manufacturer’s name or trademark. (b) Flange size (NPS). (c) Pressure class. (d) Winding metal abbreviation (Table l9), except that the abbreviation may be omitted when 304 stainless steelisused. ( e ) Fillermaterial abbreviation (Table 19). (f) Centering and inner ring metal abbreviation (Table 19), except that the abbreviation maybe omitted when carbon steel is used for the outer ringand 304 stainless steelisused for the inner ring. (g) Flange identification. Gaskets intended for ASME B 16.47 flanges shall be marked B 16.47 A or B 16.47 B, as applicable. Gaskets intended for ASME B16.5 flangesneednot be so marked. Illustrative marking examples are shown in Table 20. ( h ) ASME B16.20 designation.

4.2.1 General. Jacketed gaskets shall be made with a fillermaterial enclosed in a metal jacket. 4.2.2JacketThickness. The jacket metal thicknessshall be a minimum of 0.015 in. 4.2.3 FillerThickness. The filler thickness shall be a minimum of 0.06 in. 4.2.4 Miscellaneous. Other design details, including the density of the filler, shall be the gasket manufacturer’s responsibility. 4.3 Dimensions and Tolerances Gasket dimensions and tolerances shall be in accordance with Tables 21, 22, or 23.

4.4 Materials Metal jacket and filler material shall be selected from Table 24. For jacketed gasket limitations related to ASME B 16.5 applications, see Annex E of ASME

B16.5. 4.5 Marking

3.4.2PressureClass. Gaskets suitable for more than one pressure class shall be marked with all applicable classes, as shown in Table 20.

4.1 Size and PressureClass

4.5.1 Applied Marking. Jacketed gaskets shall be marked with waterproof inkor equivalent. Where gasket size does not permit such markings, a separate attached markingtag maybeused. The lettering height shall be a minimum of 0.2 in. The following information shall be includedwiththe markings: (a) Manufacturer’s name or trademark. (b) Flange size (NPS). (c) Pressure class. (dl Jacketed material abbreviation (Table 24), except that the abbreviation may be omitted when soft carbon steel is used. ( e ) Filler material abbreviation (Table 24). (f) Flange identification. Gaskets intended for ASME B 16.47 flangesshall be marked B 16.47 A or B 16.47 B, as applicable. Gaskets intended for ASME B 16.5 flangesneednotbe so marked. Illustrative marking examples are shown in Table 25. ( g ) ASME B 16.20 designation.

Jacketed gaskets are identified by flange size (NPS), pressureclass, and theappropriate flange standard (ASME B 16.5 or ASME B 16.47).

4.5.2 PressureClass. Gaskets suitable for more than one pressure class shall be marked with all applicable classes.

3.4.3 Color Coding. Spiral-wound gaskets shall be marked with a color code thatidentifiesthewindings andfiller materials. A continuous color aroundthe outer edge of the centering ringshallidentify the winding metal. The color identifying the filler material have four intermittent for NPS 1 and larger shall stripes spaced approximately 90 deg apart on the outer edge ofthe centering ring. Smaller size gaskets shall have a minimum of two stripes 180 deg apart. The colors shallconform to those listed in Table 19.

4 JACKETEDGASKETS

3


ASME

816.20-1998


23 deg

n

Octagonal

Oval

TABLE 3 TYPE R RING GASKET DIMENSIONS AND TOLERANCES Height of Ring Ring Number

1.344

Pitch Diameter of Ring, P

50 75

R-I 1 R-I2 R-I3 R-14 R-15

R-I6 R-17

2.000

50

R-I8

2.375

63

1.688

Width of Ring, A

Oval,

B

Octagonal, H

0.44

0.38

Width of Flat on Octagonal Ring, C

Radius in Octagonal Ring, R,

0.250 0.313 0.50 0.313 0.50 0.313 0.50 0.50 0.313

0.56 0.56 0.56 0.56

0.170 0.206 0.206 0.206 0.206

0.06 0.06 0.06 0.06 0.06

0.56 0.56 0.56 0.56 0.56

0.206 0.206 0.206 0.206 0.206

0.06

563 688

R-19 R-20

0.3 13 0.50 0.313 0.50 0.313 0.50 0.313 0.50 0.50 0.313

44 50 250 50 00

R-21 R-22 R-23 R-24 R-25

0.438 0.63 0.313 0.50 0.438 0.63 0.438 0.63 0.50 0.313

0.69 0.56 0.69 0.69 0.56

0.305 0.206 0.305 0.305 0.206

0.06

000 50 75 00 25

R-26 R-27 R-28 R-29 R-30

0.63 0.438 0.438 0.63 0.500 0.69 0.313 0.438 0.63

0.69 0.69 0.75 0.56 0.69

0.305 0.305 0.341 0.206 0.305

0.06 0.06 0.06 0.06 0.06

75

R-31

0.438 0.63 0.500 0.69 0.313 0.50 0.438 0.63 0.63 0.438

0.69 0.75 0.06 0.56 0.06 0.69 0.06 0.69 0.06

0.305 0.341 0.206 0.305 0.305

0.06

88 75

R-32 R-33

R-34 R-35

5.000 5.188

O. 50

0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06

(continued)

4


GASKETS METALLIC

ASME 816.20-1998

FOR PIPE FLANGES

TABLE 3 TYPE R RING GASKET DIMENSIONS AND TOLERANCES (CONT'D) Ring Number

Average Pitch Diameter of Ring, P

Height of Ring

on Width of FlatRadius Octagonal Ring,

Width of Ring, A

Oval,

Octagonal,

B

H

c

in Octagonal Ring, R,

R-36 R-37 R-38 R-39 R-40

5.875 5.875 6.188 6.375 6.750

0.31 3 0.438 0.625 0.438 0.313

0.56 0.69 0.88 0.69 0.56

0.50 0.63 0.81 0.63 0.50

0.206 0.305 0.413 0.305 0.206

0.06 0.06 0.06 0.06 0.06

R-41 U-42 u-43 u-44 u-45

7.125 7.500 7.625 7.625 8.313

0.438 0.750 0.313 0.438 0.438

0.69 1.o0 0.56 0.69 0.69

0.63 0.94 0.50 0.63 0.63

0.305 0.485 0.206 0.305 0.305

0.06 0.06 0.06 0.06 0.06

R-46 R-47 R-48 R-49 R-50

8.313 9.000 9.750 10.625 10.625

0.500 0.750 0.3 13 0.438 0.625

0.75 1.o0 0.56 0.69 0.88

0.69 0.94 0.50 0.63 0.81

0.341 0.485 0.206 0.305 0.413

0.06 0.06 0.06 0.06 0.06

R-51 R-52 u-53 R-54 R-55

11 .o00 12.000 12.750 12.750 13.500

0.875 0.313 0.438 0.625 1.125

1.13 0.56 0.69 0.88 1.44

1.O6 0.50 0.63 0.81 1.38

0.583 0.206 0.305 0.413 0.780

0.06 0.06 0.06 0.06 0.09

R-56 R-57 R-58 R-59 R-60

15.000 15.000 15.000 15.625 16.000

0.313 0.438 0.875 0.3 13 1.250

0.56 0.69 1.13 0.56 1.56

0.50 0.63 1.06 0.50 1.50

0.206 0.305 0.583 0.206 0.879

0.06 0.06 0.06 0.06 0.09

R-61 R-62 R-63 R-64 R-65

16.500 16.500 16.500 17.875 18.500

0.438 0.625 1.o00 0.313 0.438

0.69 0.88 1.31 0.56 0.69

0.63 0.81 1.25 O. 50 0.63

0.305 0.413 0.681 0.206 0.305

0.06 0.06 0.09 0.06 0.06

R-66 R-67 R-68 R-69 R-70

18.500 18.500 20.375 21.000 2 1.o00

0.625 1.125 0.313 0.438 0.750

0.88 1.44 0.56 0.69 1.o0

0.81 1.38 0.50 0.63 0.94

0.413 0.780 0.206 0.305 0.485

0.06 0.09 0.06 0.06 0.06

R-7 1 R-72 R-73 u-74 R-75

2 1 .o00 22.000 23.000 23.000 23.000

1.125 0.3 13 0.500 0.750 1.250

1.44 0.56 0.75 1.o0 1.56

1.38 0.50 0.69 0.94 1.50

0.780 0.206 0.341 0.485 0.879

0.09 0.06 0.06 0.06 0.09

U-76 R-77 R-78 R-79 R-80

26.500 27.250 27.250 27.250 24.250

0.313 0.625 1.o00 1.375 0.313

0.56 0.88 1.31 1.75

0.50 0.81 1.25 1.63 0.50

0.206 0.413 0.681 0.977 0.206

0.06 0.06 0.09 0.09 0.06

...

(continued)

5


LLIC 816.20-1998

ASME

PIPE

FOR

FLANGES

TABLE 3 TYPE R RING GASKET DIMENSIONS AND TOLERANCES (CONT'D) Height of Ring Oval,

Octagonal, Octagonal

Width of Flat on Ring,

B

H

C

Average Diameter Width PitchRing Number

00

500 500 750

000 000 250

of of Ring, P

Ring, A

Radius in Octagonal Ring, RI

R-81 R-82 R-84 R-85

0.563 0.438 0.438 0.500

0.377... 0.305 0.305 0.341 ...

0.75 0.63 0.63 0.69

0.06 0.06 0.06 0.06

R-86 R-87 R-88 R-89 R-90

0.625 0.625 0.750 0.750 0.875

0.413 0.413 . . . 0.485. . . 0.485

...

...

0.81 0.81 0.94 0.94 1.O6

0.06 0.06 0.06 0.06

...

1.50

R-9 1 R-92 R-93 R-94 R-95

10.250

... ...

...

1.250 0.63 0.438 0.750 0.750 0.750

R-96 R-97 R-98 R-99 R-I00

29.500

0.875 0.875 0.875 0.438 1.125

R-101 R-I02 R-103 R-104 R-105

31.500 33.750 36.000 38.000 40.250

1.250 1.250 1.250 1.375 1.375

0.06

0.879 0.305 0.485 0.485 0.485

0.09 0.06 0.06 0.06 0.06

1.O6 1.O6 1.O6 0.63 1.38

0.583 0.583 0.583

0.06 0.06 0.06 0.06 0.09

1.50 1.50 1.50 1.63 1.63

0.879 0.879 0.879 0.977 0.977

0.09 0.09 0.09 0.09 0.09

0.69

... ...

... ...

... ... 0.305. . . 0.780 . . .

GENERAL NOTE: All dimensions are in inches. TOLERANCES: P = average pitch diameter of ring, k0.007 A = width of ring, 20.008 B, H = height of ring, +0.05, -0.02 Variation in height throughout the entire tolerances. C = width of flat on octagonal ring, k0.008 R,. = radius in ring, 20.02 23 deg = angle, kv2deg


0.583

..* ... ... ... ...

0.94 0.94 0.94

circumference of any given ring shall not

exceed 0.02 within these


TABLE 4 PIPE SIZES FORTYPE R RING GASKETS SUITABLE FOR REFERENCED STANDARDS Pressure Classes Ring Number

R-1 1 R-12 R-13 R-14 R-15 R-16 R-17 R-18 R-19 R-20 R-21 R-22 R-23 R-24 R-25 R-26 R-27 R-28 R-29 R-30 (2) R-31 R-32 R-33 R-34

150

300-600

... ... ...

...

... 1

... 1'/4

... 1v 2

...

...

'12

3

14

...

720-960 (1)

2000

3000

5OOO

150

300-600

900

...

...

...

...

...

... ...

...

... ...

... ...

...

... ... ...

... ...

... ...

.., ... ... ...

... ... ... ...

li2

...

3

14

1 12

... 3

14

1

1

1

...

...

...

1'/4

1'/4

1'/4

1'/2

...

1'/z

...

1Y2

2

...

... ...

... ...

...

2

...

... ... ...

2

2

2v 2

... ...

...

... 2Y2

...

... ...

3

... ... ... 3

... ...

... ...

... ...

R-37 R-38 R-39

...

...

R-40

5

R-4 1 R-42 R-43 R-44 R-45 R-46

...

5

...

...

6

... ...

...

... ...

4

...

... ...

3

... ...

... ... ... 4

... ... ... 5

... ...

...

... 5; ... '/4

... 1

... ... 1Y4

...

1/'2

...

...

1

1

1

1

...

...

...

...

1'/4

1'/4

1y4

...

15;

...

... 2

..,

2

2'/z

2'4

...

...

... 11 4

... ... 2

...

... 25i

... ...

... ...

...

...

... ...

... 3

3

3

...

...

...

...

...

3

...

...

... ...

...

...

...

... ...

... ... ...

...

...

... 4

4

...

... ...

...

...

...

...

5

...

... ...

...

4

...

... ... 5

... ... ...

... ...

4

...

... ... 5

...

1'/2

... ... ... 2

...

... 21/2

3

... ... ... ... ... 4

...

...

...

...

...

8

8

...

a

...

...

... ... ...

...

... ...

10

10

...

...

10

...

...

10

10

...

...

...

... ..* 10

... ... ...

... . . I

6

... 6

... ...

... ...

...

8

8

...

...

...

...

... ... ...

...

... ... ...

... ... ...

... ...

...

...

... ...

... ...

... ...

... ... ...

...

... ... ... ...

8

...

...

10

...

... ...

...

10

...

...

.f.

... ... ... ... ...

...

... ...

...

... ... ... ...

... ... ... ...

4

...

...

... ... ...

...

...

...

...

3'4

...

5

6

... ... ...

3

...

...

...

...

...

...

...

... ... ...

...

...

...

...

6

...

... ... ...

...

... ...

...

... ...

214

5

...

a

... ...

...

... ...

8

2

...

...

...

...

... ...

6

...

... ...

... ...

...

6

...

15;

...

...

...

6

...

...

...

...

11/4

...

...

6

...

... ... ...

,.. ... *..

...

5 ...

8

... ...

21/2

3 3

...

...

2%

...

4

...

...

... ... ...

...

...

... ...

R-35 R-36

R-51 R-52 R-53 R-54

2500

...

3'/2

R-50

1500

...

...

ASME 816.47 Series A

900

...

...

R-47 13-48 R-49

API 6 8

ASME 616.5

...

...

...

...

... ...

... ... ...

... ... .

I

.

...

...

... ...

... ... ...

...

...

... ... ... ...

... ... ...

...

...

... ... ... ...

... ... ... ...

... ... ...

... ...

...

...

...

...

... ...

...

... ...

...

(continued)

7


STD-ASME BLb*E!U-ENGL


TABLE 4 PIPE SIZES FOR TYPE R RING GASKETS SUITABLE FOR REFERENCED STANDARDS (CONT'D) Pressure Classes Ring ' Number R-55 R-56 R-57 R-58 R-59 R-60 R-61 R-62 R-63 R-64 R-65 R-66 R-67 R-68 R-69 R-70 R-71 R-72 R-73 R-74 R-75 R-76 R-77 R-78 R-79 R-80 R-81 R-82 R-a4 R-85 R-86 R-a7 R-88 R-a9 R-90 R-91 R-92 R-93 R-94 R-95

ASME B16.5

6B

ASME 616.47 Series A

API

150

300-600

900

1500

2500

720-960 (1)

2000

3000

...

... ...

...

... ...

10

...

...

...

...

... ...

...

...

12

12

12

...

...

...

...

...

12

...

12 12 ...

12

...

...

...

14

... ...

...

14

...

... ... ... ... 16

la

...

... 18

...

... ... ...

20

...

...

...

14

_..

...

14

...

...

...

... ...

...

... ... ...

... ...

16

16

... ... ... ... 16

...

...

...

...

... 16

...

16

. . .. . . . . . ... ... 18 ... ...

24

...

... ...

24

...

...

...

...

24

...

...

... 24

... ... ... . . . . . .

... ...

...

...

...... ...

... ... ... ... ...

... ... ... . . . ... . . . ... ... ... ... ... ...

...

...

... ... ...

... ...

... ...

...

... ... ... ... ... ... ...

... ...

... ...

...

la

...... ... 20 ... ... 20 ... ...

...

...

...

...

20

...

...

...

... ...

*.. ...

...

... ...

...

... ...

...

... ...

...

... ... ...

14

... 14

...

18

18

...

...

...

20

20

...

...

...

... ...

... ... ...

...

...

... ... ...

... ... ...

...

... ...

... ... ... ...

... ... ...

... ... ... ...

... ... ...

... ... ...

... ...

... ...

... ...

...

... ... ...

... ...

...

...

... ...

...

...

...

... ...

... ...

... ...

... 16

...

300-600

...

...

... la

... ... 20

...

...

...

14

...

...

12

...... ...

150

10000 (1)

... ...

... ...

...

...

... ... ... . . .... ... ...

... ... ... ... ... ... ... ... 1

...

...

... ... ... ...

...

...... ...

... ... ... ... ... ...

... ...

...

.. ... ... ... 22

... ...

12

...

... 14

...

... ... 16

...

... ... la

900

... ... 12 ... ... ... ... 14

... ...

... 16

... ... ... 18

...

... 20

... ...

24

...

... ... 20

...

... ...

... ...

24

22

...

... ...

... ...

1Y2 ... 2 2'/2 3 4

... ...

...

...

...

3v2

... ... ... ...

... ...

...

...

...

...

26 2a 30

5 10

...

... ... ...

... ...

...

... ...

...

... ...

...

...

...

... ...

...

(continued)

8



ASME 816.20-1998

TABLE 4 PIPE SIZES FOR TYPE R RING GASKETS SUITABLE FOR REFERENCED STANDARDS (CONT'D) Pressure Classes Ring Number

API 6B

ASME B16.5

150

300-600

900

R-96 R-97 R-98 R-99 R-I00 R-101

... ... ...

... ...

...

R-102 R-I03 R-IO4 R-105

... ...

. . .. . .

...

...

...

...

...

...

...

...

... ...

... ... ... ... ..

... ...

... . .... . ...

... ...

1500

... ... ... ... ... ... ... ... ...

816.47

ASME

Series A

2500

720-960 (1)

2000

3000

10000 (11

150

300-600

900

...

... ... ... ...

...

..*

32 34 36

...

... ... ...

...

... ... 8

...

...

.. . . ... ...

...

...

...

... ... ...

...

...

...

...

... ...

...

...

...

...

... ... ...

8

... .... . . ... ... ... ...

... ... ... ... ... ...

...

... ... ...

... ... ... ...

... ... ... ...

... ...

... 26 28 30 32 34 36

GENERAL NOTE: End flanges to API 6D and API 600 use gaskets for equivalent pipe size under ASME B16.5 or ASME B16.47 series A. NOTES: (1) Class 720, 960, and 10000 flanges to API 6B are obsolete. Data are for information only. (2) R-30 is for lapped joint only.

9


ASME B16.20-1998

FOR PIPE FLANGES

METALLIC GASKETS 23 deg

TABLE 5 TYPE RX RING GASKET DIMENSIONS AND TOLERANCES Ring Number

4 3.000 RX-20 9 3.672 RX-23 0.167 0.254RX-24 0.469 0.182 RX-25 0.344 0.254 RX-26 0.469

031 2

656

Outside Diameter of Ring,

OD

Width of Ring, A

Width of Flat,

Height of Outside Bevel,

C

D

0.06 O. 182 0.750 4.172 4.313 4.406

O. 125 O. 167

1

Height of Ring, H

Radius of Size, Ring,

Hole

S

E (1)

... 1.o00 1.o00 0.750

O. 167

.o00

0.06 0.06 0.06 0.06

RX-27 RX-31 RX-35 RX-37 RX-39

4.656 5.297 5.797 6.297 6.797

0.469 0.469 0.469 0.469 0.469

0.254 0.254 0.254 0.254 0.254

O. 167 O. 167 0.167 O. 167 O. 167

1.o00 1.o00 1.o00 1.o00 1.o00

0.06 0.06 0.06 0.06 0.06

RX-41 RX-44 RX-45 RX-46 RX-47

7.547 8.047 8.734 8.750 9.656

0.469 0.469 0.469 0.531 0.781

0.254 0.254 0.254 0.263 0.407

O. 167 O. 167 O. 167 0.188 0.271

1.o00 1.000 1.o00 1.125 1.625

0.06 0.06 0.06 0.06 0.09

RX-49 RX-50 RX-53 RX-54 RX-57

11.O47 11.156 13.172 13.28 1 15.422

0.469 0.656 0.469 0.656 0.469

0.254 0.335 0.254 0.335 0.254

O. 167 0.208 O. 167 0.208 O. 167

1.o00 1.250 1.o00 1.250 1.o00

0.06 0.06 0.06 0.06 0.06

RX-63 RX-65 RX-66 RX-69 RX-70

17.391 18.922 0.254 0.335 1.422 0.254 0.407

0.333 O. 167 0.208 1 O. 167 0.271

2.000 .o00

0.09 0.06

.o00

0.06

0.582 1.O63 0.469 0.656 0.06 0.469 0.781 0.09

1 1.250 1.625

...

...

... ...

...

... ...

...

...

... ... ...

...

...

... ... ...

...

... ...

... ... ...

(continued)

10


METALLlC 816.20-1998 GASKETSASME FOR PtPE FLANGES

TABLE 5 TYPE RX RING GASKET DIMENSIONS AND TOLERANCES (CONT'D) Height of Ring,

Radius of Ring,

H

RI

Hole size, E (11

Ring Number

Outside Diameter of Ring, OD

Width of Ring,

Width of Flat,

A

C

RX-73 RX-74

23.469 23.656

0.531 0.781

0.263 0.407

0.208 0.271

1.250 1.625

0.06 0.09

... ...

RX-82 ~x-84 RX-85

2.672 2.922 3.547

0.469 0.469 0.531

0.254 0.254 0.263

0.167 O. 167 0.167

1.o00 1.o00 1.O00

0.06 0.06 0.06

0.06 0.06 0.06

RX-86 RX-87 RX-88 RX-89 RX-90

4.078 4.453 5.484 5.109 6.875

0.594 0.594 0.688 0.719 0.781

0.335 0.335 0.407 0.407 0.479

0.188 0.188 0.208 0.208 0.292

1.125 1.125 1.250 1.250 1.750

0.06 0.06 0.06 0.06 0.09

0.09 0.09 0.12 0.12 0.12

11.297 9.672 2.026 2.453 3.844 5.547

1.188 0.469 0.226 0.219 0.375 0.469

0.780 0.254 O. 126 0.120 0.213 0.210

0.297 0.167 0.057 0.072 0.125 0.167

1.781 1.o00 0.445 0.437 O .7 50 1.000

0.09 0.06 0.02 0.02 0.03 0.06

0.12

RX-91 RX-99 RX-201 RX-205 RX-210 RX-2 15

Height of Outside Bevel, D

(2) (2) (2)

..

(3) (3) (3) (3)

... ...

...

GENERAL NOTE All dimensions are in inches. NOTES: (1) Rings RX-82 through RX-91 only require one pressure passage hole as illustrated. The centerline of the hole shall be located at the midpoint of dimension C. (2) Tolerance on these dimensions is +O, -0.015. (3) Tolerance on these dimensions is +O.OZ, -0. TOLERANCES: OD = outside diameter of ring, +O.OZO. -0 A = width of ring, +0.008, -0 Variation in width throughout the entirecircumference of any ring shall not exceed 0.004 within these tolerances. C = width of flat, +0.006, -0 D = height of outside bevel, +O, -0.03 H = height of ring, +0.008, -0 Variation in height throughout the entire circumference of any ring shall not exceed 0.004 within these tolerances. R, = radius of ring, 20.02 23 dag = angle, A?; deg E = hole size, +_0.02

II


METALLIC GASKETS

ASME 616.20-1998

FOR

TABLE 6 PIPE SIZES FOR TYPE RX RING GASKETS SUITABLE FOR REFERENCED STANDARDS Pressure Classes

API 68 Ring Number RX-20 RX-23 RX-24 RX-25 RX-26 RX-27 RX-31 RX-35 RX-37 RX-39 RX-41 RX-44 RX-45 RX-46 RX-47 RX-49 RX-50 RX-53 RX-54 RX-57 RX-63 RX-65 RX-66 RX-69 RX-70

18

20

RX-73 RX-74 RX-82 RX-84 RX-85 RX-86 RX-87 RX-88 RX-89 RX-90

15

RX-91 RX-99 (2) RX-201 RX-205 ... RX-210 RX-2

720-960 2000 (1I 1'/z 2

...

2900 Il)

... ...

...

...

3000

5000

1'/2

1v 2

2

2 378

...

...

... ...

2'/2

...

272

3

... ...

3

...

...

4

...

4

...

... ...

...

5

...

6

...

...

...

...

...

... ...

8

...

... 10

... 12

... 16

... ...

... ... ... ... ...

...

... ... ... ...

... ... ... ... ... ... ... ... ... ... ...

... 5

... 6

...

(2)...

5

... 6 8

10

...

12

...

... ...

... 16

...

8

10

14

... ... ...

...

... ...

20

...

... ...

...

18

1 15; 2

...

2% 3 4 3'/2 5

...

...

... ... ...

...

... ...

...

... ...

...

...

...

8 (2)

...

... ...

...

...

...

...

10

...

4

8

...

... ...

8

3

...

... ...

...

...

v*

1 1Y 1 6 2%6 4%s

NOTES: (1) Class 720, 960, and 2900 flanges to API 66 are obsolete. Data are for information only. (2) Crossover flange ,connection.

12


PIPE FLANGES


ASME 616.20-1998

TABLE 7 TYPE BX RING GASKET DIMENSIONS AND TOLERANCES Outside Diameter of Flat, ODT

Width ofSize, Flat,

Hole

c

D (1)

0.488

2.790 2.954 3.277 3.910 4.531

0.314 0.325 0.346 0.385 0.419

0.06 0.06 0.06 0.06 0.06

0.560 0.733 0.826 0.91 1 1.012

0.560 0.733 0.826 0.91 1 1.012

5.746 9.263 11.476 13.731 16.657

0.481 0.629 0.709 0.782 0.869

0.06 0.12 0.12 0.12 0.12

15.850 19.347 18.720 2 1.896 22.463

0.938 1.105 0.560 1.185 1.185

0.541 O. 638 0.560 0.684 0.968

15.717 19.191 18.641 21.728 22.295

0.408 0.482 0.481 0.516 0.800

0.12 0.12 0.06 0.12 0.12

BX-165 BX-166 BX-167 EX-168 BX-169

24.595 25.198 29.896 30.128 6.831

1.261 1.261 1.412 1.412 0.624

0.728 1.O29 0.516 0.632 0.509

24.417 25.020 29.696 29.928 6.743

0.550 0.851 0.316 0.432 0.421

0.12 0.12 0.06 0.06 0.06

BX-170 BX-17 1 BX-172 BX-303

8.584 10.529 13.113 33.573

0.560 0.560 0.560 1.494

0.560 0.560 0.560 0.668

8.505 10.450 13.034 33.361

0.481 0.481 0.481 0.457

0.06 0.06 0.06 0.06

Outside Diameter of Ring, OD

Height of Ring, H

Width of Ring,

2.842 3.008 3.334 3.974 4.600

0.366 0.379 0.403

0.366 0.379 0.403

0.448

0.448

0.488

BX-155 BX-I56 BX-157 BX-158 BX-159

5.825 9.367 11.593 13.860 16.800

BX-160 EX-161 BX- 62 1 BX-163 BX-164

Nominal Ring Number BX-1 50 BX-151 BX-152 BX-153 BX-154

Size, in.

GENERAL NOTES: (a) All dimensions are in inches. (b) Radius R shall be 8% to 12% of the gasket height

A

H. (continued)

13


ASME 616.20-1998


NOTES TO TABLE 7 (CONT'D) NOTE: (1) One pressure passage hole is required per gasket as illustrated. The center line of the hole shall be located at the midpoint of dimension C. TOLERANCES: OD = (outside diameter of ring) +O, -0.005 H = (height of ring) +0.008,-0 Variation in height throughout the entire circumference of any ring shall not exceed 0.004 within these tolerances. A = (width of ring) +0.008,-0 Variation in width throughout theentire circumference of any ring shall notexceed 0.004 within these tolerances. ODT = (outside diameter of flat) k0.002 C = (width of flat) +0.006,-0 D = (hole size) 20.02 R = (radius of ring) see General Note (b) 23 deg = (angle) deg

+v4

TABLE 8 PIPE SIZES FOR TYPE BX

RING GASKETS SUITABLE FOR REFERENCED STANDARDS Pressure Classes API 6BX

Ring Number BX-150 BX-151 BX-152 BX-153 BX-154 BX-155 BX-156 BX-157 BX-158 ...BX-159 BX-160 %X-161 BX-162 BX-163 . .BX-164 . BX-165 BX-166 BX-167 %X-168 %X-169 %X-170 BX-171 BX-172 BX-303

2000

3000

S000

10000

...

...

...

... ... ...

...

...

1 V16 113/16 2'11 6 29/16 31/16

...

... ... ... ...

... ... ...

... ...

...

...1378 ...

...

...

...

...

... ...

...

26'/4

...

... ... 30

... ... ...

... *..

1378

... ... ...

... ... ...

...

...

...

...

26'/4

...

1378 1674 1674 1S3/4 1874

...

21v 4

... ...

...

...

... ...

...

30

...

...

...

...

14


'

...

2916 3716

4 '11 6 71 ' 16 9 11 13'/8

... ... 1674

15000 1'Yl6 I'Yl6 2 % ~ 29/16 3'/16

...

...

...

... 1874

... ...

5

Y*

65/8 8%6 11'/32

...

1"4 8 2%6

4%6 7716 9 11

18%

...

...

4%6 7 '11 6 9 11

...

2 1/4'

20000

...

... ... ... ...

...

...

...

... ... ... ... ... ... ... ...

B16.20-1998

I.5

ASME PIPE FLANGES FOR GASKETS METALLIC



18.00 20.50 22.50 26.75

16.63 18,69 20.69 24.75

7.19 9.19 11.31 13.38 14.63

2.75 3.25 4.00 5.00 6.13

0.75 1 .oo 1.25 1.88 2.13

150

16.63 18.69 20.69 24.75

7.19 9.19 11.31 13.38 14.63

2.75 3.25 4.00 5.00 6.13

0.75 1.00 1.25 1.88 2.13

300

16.25 18.50 20.50 24.75

6.88 8.88 10.81 12.88 14.25

.. .. .. 4.75 5.81

. .. . .. ..

16.25 18-50 20.50 24.75

6.88 8.88 10.81 12.88 14.25

2.75 3.25 4.00 4.75 5.81

0.75 1.00 1.25 1.88 2.13

600

Diameter

16.25 18.25 20.50 24.75

6.88 8.75 10.88 12.75 14.00

3.75 4.75 5.81

. ..

I..

...

..

16.00 18.25 20.25 24.25

6.75 8.50 10.50 12.75 14.25

2.31 2.75 3.63 4.63 5.63

0.75 1.00 1.25 1.56 1.88

1500 (1)

(3)

2,31 2.75 3.63 4.63 5.63

0.75 1.00 1.25 1.56 1.88

(1, 5)

. .. .. . ___ . ..

20.25 21.63 23.88 28.25

8.75 11.00 13.38 16.13 17.75

4.13 4.88 5.38 6.88 7.75

1.88 2.25 2.63 3.00 3.38

150

21.25 23.50 25.75 30.50

9.88 12.13 14.25 16.63 19.13

4.38 5.13 5.88 7.13 8.50

2.13 2.63 2.88 3.25 3.75

300

Outside

21.13 23.38 25.50 30.25

9.75 12.00 14.13 16.50 19.00

. 7.00 8.38

. .

. _._ .,. . . . .

400 (5)

Diameter

22.25 24.13 26.88 31.13

10.50 12.63 15.75 18.00 19.38

4.38 5.13 5.88 7.63 9.50

2.13 2.63 2.88 3.25 3.75

600

of Centering

USED WITH ASME B16.5 FLANGES

6.75 8.50 10.63 12.50 .. .

2500

GASKETS

by Class

900 (1, 5)

of Gasket

FOR SPIRAL-WOUND

400 (51

Inside

DIMENSIONS

22.63 25.13 27.50 33.00

11.38 14.13 17.13 19.63 20.50

. .. 6.63 8.13 9.75

. ..

SOO(5)

Ring

25.25 27.75 29.75 35.50

11.13 13.88 17.13 20.50 22.75

5.63 6.50 6.88 8.25 10.00

2.50 2.75 3.13 3.50 3.88

1500

by Class

,.. ,.. .. . .. .

12.50 15.25 18.75 21.63

5.75 6.63 7.75 9.25 11 .oo

2.75 3.00 3.38 4.13 4.63

2500(5)

(4)

GENERAL NOTES: (a) For reference, see Table 9 illustration beginning on previous page. (b) The gasket-thickness tolerance is iO.005 in. measured across the metallic portion of the gasket not including the filler, which may protrude slightly beyond the metal. (c) For limitations on the maximum flange bore for use with these spiral-wound gaskets, see Table 16. NOTES: (II Inner rings are required for all PTFE filled gaskets and for Class 900 gaskets, NPS 24; Class 1500 gaskets, NPS 12 through NPS 24; and Class 2500 gaskets, NPS 4 through NPS 12 (see para. 3.2.5 and Table 12). (2) The gasket outside diameter tolerance for NPS ‘/2 through NPS 8 is r0.03 in.; for NPS 10 through NPS 24, +0.06 in., -0.03 in. (3) The gasket inside diameter tolerance for NPS 5; through NPS 8 is iO.016 in.; for NPS 10 through NPS 24, kO.03 in. (4) The centering ring outside diameter tolerance is 20.03 in. (5) There are no Class 400 flanges in NPS 1/Z through NPS 3 (use Class 8001, Class 900 flanges in NPS ‘/* through NPS 2’/* (use Class 1500), or Class 2500 flanges NPS 14 and larger.

18.25 20.75 22.75 27.00

16 18 20 24

8.25 10.13 12.25 14.50 15.75

3.38 3.88 4.75 5.88 7.00

3.38 3.88 4.75 5.88 7.00

8.25 10.38 12.50 14.75 16.00

1.25 1.56 1.88 2.38 2.75

1.25 1.56 1.88 2.38 2.75

of

Classes 900, 1500, 2500

Diameter Gasket (2)

Classes 150, 300. 400.600

6 8 10 12 14

Flange Size W’S)

Outside

TABLE 9

i

B 9 4

f?

s

W

R 5

COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services 0.117

in. thick r

Centering

TABLE 10 ILLUSTRATION

in.4131 I ring

Centering

ring

outside

(l)l, in. thick

diameter

[Note -0.131


00

26.50 28.50 30.50 32.60 34.50 36.50

38.50 40.50 42.50 44.50 46.50 48.50

50.50 52.50 54.50 56.50 58.50 60.50

26 28 30 32 34 36

38 40 42 44 46 48

50 52 54 56 58 60

52.50 54.50 56.50 58.50 60.50 62.50

40.13 42.13 44.25 46.38 48.38 50.38

27.75 29.75 31.75 33.88 35.88 38.13

Outside Diameter (3)

150

56.50 58.75 61 .OO 63.25 65.50 67.50

43.75 45.75 48.00 50.25 52.25 54.50

30.50 32.75 34.75 37.00 39.00 41.25

Centering Ring Outside Diameter (4)

51 .oo 53.00 55.25 57.25 59.50 61.50

38.50 40.25 42.25 44.50 46.38 48.63

27.00 29.00 31.25 33.50 35.50 37.63

Class

53.00 55.00 57.25 59.25 61.50 63.50

40.00 42.13 44.13 46.50 48.38 50.63

29.00 31 .oo 33.25 35.50 37.50 39.63


300

54.25 56.25 58.75 60.75 62.75 64.75

41.50 43.88 45.88 48.00 50.13 52.13

32.88 35.38 37.50 39.63 41.63 44.00


FOR SPIRAL-WOUND

Gasket

12)

Inside Diameter

DIMENSIONS

40.25 42.38 44.38 46.50 49.00 51.00 53.00 55.00 57.25 59.25 61.25 63.75

51.00 53.00 55.25 57.25 59.25 61.75

29.00 31 .oo 33.25 35.50 37.50 39.63


55.25 57.25 59.75 61.75 63.75 66.25

42.25 44.38 46.38 48.50 50.75 53.00

32.75 35.13 37.25 39.50 41.50 44.00


52.00 54.00 56.25 58.25 60.50 62.75

39.00 41.25 43.50 45.75 47.75 50.00

27.00 29.00 31.25 33.50 35.50 37.63

(2)

Inside Diameter

600

54.00 56.00 58.25 60.25 62.50 64.75

41.00 43.25 45.50 47.75 49.75 52.00

29.00 31.00 33.25 35.50 37.50 39.63


Gasket

Class

57.00 59.00 61.25 63.50 65.50 60.25

43.50 45.50 48.00 50.00 52.25 54.75

34.13 36.00 38.25 40.25 42.25 44.50


slightly

... *. . ... . .. ... ..,

40.75 43.25 45.25 47.50 50.00 52.00

27.00 29.00 31.25 33.50 35.50 37.75

Inside Diameter (2,5)

900 (11

beyond

the metal.

.*I ... ... .. ... .. .

47.25 49.25 51.25 53.88 56.50 58.50

42.75 45.25 47.25 49.50 52.00 54.00 ... ... .. . ... , .. . ..

34.75 37.25 39.75 42.25 44.75 47.25

Centering Ring Outside Diameter (4. 5) 29.00 31.00 33.25 35.50 37.50 39.75

Outside Diameter (3,5)

Gasket

Class

USED WITH ASME B16.47 SERIES A FLANGES 400

38.25 40.38 42.38 44.50 47.00 49.00

27.00 29.00 31.25 33.50 35.50 37.63

(2)

inside Diameter

Gasket

Class

GASKETS

GENERAL NOTES: (a) For reference, see Table 10 illustration beginning on previous page. ib) The gasket-thickness tolerance is kO.005 in. measured across the metallic portion of the gasket not including the filler, which may protrude (c) For limitations on the maximum flange bore for use with these spiral-wound gaskets, see Table 17. id) ASME 616.47 Series A flanges NPS 12 through NPS.24 have the same raised face dimensions as ASME B16.5 flanges. NOTES: (1) Inner rings are required for all PTFE gaskets and Class 900 gaskets, NPS 26 through NPS 48 (see para. 3.2.5 and Table 13). (2) The gasket inside diameter tolerance for NPS 26 through NPS 34 is iO.03 in., and the tolerance for NPS 36 through NPS 60 is kO.05 in. (3) The gasket outside diameter tolerance for NPS 26 through NPS 60 is iO.06 in, (4) The centering ring outside diameter tolerance is iO.03 in. (5) There are no Class 980 flanges NPS 50 and larger.

(2)

Inside Diameter

Flange Sire W’S)

Gasket

Class

TABLE 10

5 tn

5

B s 3

R I?! ;:

? F 5 G,

3E

52 a ii 1. 8

COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services 0.117

TABLE

I

in.-0.131 r

Centering

11 ILLUSTRATION

in. thick ring

Centering

ring

outside

(1)1, in. thick

diameter

[Note -0.131


26.50 28.50 30.50 32.50 34.50 36.50

38.37 40.25 42.50 44.25 46.50 48.50

50.50 52.50 64.50 56.88 59.07 61.31

26 28 30 32 34 36

38 40 42 44 46 48

50 52 54 56 58 60

52.19 54.19 56.00 58.18 60.19 62.44

39.75 41.88 43.88 45.88 48.19 50.00

27.50 29.50 31.50 33.50 35.75 37.75


150

53.44 55.44 57.63 59.63 62.19 64.19

41.13 43.13 45.13 47.13 49.44 51.44

28.56 30.56 32.56 34.69 36.81 38.88

Centering Rina Outside Diameter (4)

Class

53.38 55.38 57.25 60.66 61.94 64.19

41.25 43.25 45.25 47.25 49.38 51.63

28.00 30.00 32.00 34.00 36.00 38.00


300

55.88 57.88 60.25 62.75 65.19 67.19

43.25 45.25 47.25 49.25 51.88 53.88

30.38 32.50 34.88 37.00 39.13 41.25

Centering Rina Outside Diameter (41

FOR SPIRAL-WOUND

Gasket

51 .a8 53.88 55.25 58.25 60.44 62.56

39.75 41.75 43.75 45.75 47.88 49.75

26.50 28.50 30.50 32.50 34.50 36.50

Inside Diameter (21

DIMENSIONS

51.00 53.00 55.25 57.25 59.25 61.75

38.25 40.38 42.38 44.50 47.00 49.00

26.25 28.13 30.13 32.00 34.13 36.13

Inside Diameter (2)

53.00 55.00 57.25 59.25 61.25 63.75

40.25 42.38 44.38 46.50 49.00 51.00

27.50 29.50 31.75 33.88 35.88 38.00

55.25 57.25 59.75 61.75 63.75 66.25

42.25 44.38 46.38 48.50 50.75 53.00

29.38 31.50 33.75 35.88 37.88 40.25


52.00 54.00 56.25 58.25 60.50 62.75

39.00 41.25 43.50 45.75 47.75 50.00

26.13 27.75 30.63 32.75 35.00 37.00

Inside Diameter (2)

600

54.00 56.00 58.25 60.25 62.50 64.75

41 .a0 43.25 45.50 47.75 49.75 52.00

28.13 29.75 32.63 34.75 37.00 39.00


Gasket

Class

57.00 59.00 61.25 63.50 65.50 68.25

43.50 45.50 48.00 50.00 52.25 54.75

30.13 32.25 34.63 36.75 39.25 41.25

Centering Rins Outside Diameter (4)

. . . .

beyond

:: :

slightly

:::

::: .. .

. . . .

42.75 45.25 47.25 49.50 52.00 54.00

29.50 31.50 33.75 36.00 38.25 39.25

Outside Diameter 13.51

900 (1)

. . . .

..

40.75 43.25 45.25 47.50 50.00 52.00

27.25 29.25 31.75 34.00 36.25 37.25

Inside Diameter (2.5)

Gasket

Class

USED WITH ASME 616.47 SERtES 6 FLANGES 400


Gasket

Class

GASKETS

GENERAL NOTES: (a) For reference, see Table 11 illustration beginning on previous page. (b) The gasket-thickness tolerance is to.005 in. measured across the metallic portion of the gasket not including the filler, which may protrude (c) For limitations on the maximum flange bore for use with these spiral-wound gaskets, see Table 18. NOTES: (I) Inner rings are required for all PTFE gaskets and for Class 900 gaskets, NPS 26 through NPS 48 (see para. 3.2.5 and Table 14). (2) The gasket inside diameter tolerance for NPS 26 through NPS 34 is kO.03 in., and the tolerance for NPS 36 through NPS 60 is 20.05 in. (3) The gasket outside diameter tolerance for NPS 26 through Nf?S 60 is ho.06 in. (4) The centering ring outside diameter tolerance is iO.03 in. (5) There are no Class 906 flanges NPS 50 and larger.

Inside Diameter (2)

Flange Size (NPS)

Gasket

Class

TABLE 11

the metal.

:::

,*. ... ,.. ...

47.25 49.25 51.25 53.88 56.50 58.50

33.00 35.50 37.75 40.00 42.25 44.25

Centering Rina Outside Diameter (4.51


ASME 616.20-1998

TABLE 12 INNER-RING INSIDE DIAMETERS FOR SPIRAL-WOUND GASKETS Flange Size

(NPS)

Pressure Class

150

300

0.56 0.81 1 .O6 1.50 1.75

...

1 1 1/4 1v2

0.56 0.81 1 .O6 1.50 1.75

2 2‘/2 3 4 5

2.19 2.62 3.19 4.19 5.19

2.19 2.62 3.19 4.19 5.19

... ...

6.19 8.50

10.56 12.50 13.75

6 8 10 12 14

15.75 17.69 19.69 23.75

16 18 20 24

72

3

I4

400 (1)

900 600

(1.2)

1500 (2.3)

2500 (1-3)

0.56 0.81 1 .O6 1.50 1.75

... ... ... ... ...

0.56 0.81 1 .O6 1.31 1.63

0.56 0.81 1 .O6 1.31 1.63

...

4.04 5.05

2.19 2.62 3.10 4.04 5.05

3.10 4.04 5.05

2.06 2.50 3.10 3.85 4.90

2.O6 2.50 3.10 3.85 4.90

6.19 8.50 10.56 12.50 13.75

6.10 8.10 10.05 12.10 13.50

6.10 8.10 10.05 12.10 13.50

6.10 7.75 9.69 11.50 12.63

5.80 7.75 9.69 11.50 12.63

5.80 7.75 9.69 11.50

15.75 17.69 19.69 23.75

15.35 17.25 19.25 23.25

15.35 17.25 19.25 23.25

14.75 16.75 19.00 23.25

14.50 16.75 18.75 22.75

... ...

... ... ...

...

...

...

... ... ...

GENERAL NOTES: (a) The inner-ring thickness shall be 0.117 in. to 0.131 in. (b) For sizes NPS 1’/4 through NPS 3,the inside diameter tolerance is k0.03 in.; for larger sizes the inside diameter tolerance is 20.06 in. See Table 15 for minimum pipe wallthicknesses that are suitable for use with standard inner rings. NOTES: (1) There are no Class 400 flanges NPS through NPS 3 (use Class 600). Class 900 flanges NPS ’I2through NPS 2v2 (use Class 1500),or Class 2500 flanges NPS 14 and larger. (2)Inner rings are required for Class 900,NPS 24 gaskets; Class 1500,NPS 12 through NPS 24 gaskets; and Class 2500,NPS 4 through NPS 12 askets. (3)The inner-ring inside diameters shown forNPS . ! l through NPS 21/2 in Class 1500 and 2500 will produce inner-ring widths of 0.12 in., a practical minimum for production purposes.

21


STDDASME BLb-ZU-ENGL L998

m

0759b70 ObLbSbL 3bL

ASME 816.20-1998

FOR PIPE FLANGES

GASKETS METALLIC

TABLE 13 INNER-RING INSIDE DIAMETERS FOR SPIRAL-WOUND GASKETS USED BETWEEN ASME B16.47 SERIES A FLANGES Flange Size INPS)

150

300

400

600

900 (1. 21

26 28 30 32 34 36

25.75 27.75 29.75 31.75 33.75 35.75

25.75 27.75 29.75 31.75 33.75 35.75

26.00 28.00 29.75 32.00 34.00 36.13

25.50 27.50 29.75 32.00 34.00 36.13

26.00 28.00 30.25 32.00 34.00 36.25

38 40 42 44 46 48

37.75 39.75 41.75 43.75 45.75 47.75

37.50 39.50 41 -50 43.50 45.38 47.63

37.50 39.38 41.38 43.50 46.00 47.50

37.50 39.75 42.00 43.75 45.75 48.00

39.75 41.75 43.75 45.50 48.00 50.00

50 52 54 56 58 60

49.75 51.75 53.50 55.50 57.50 59.50

49.00 52.00 53.25 55.25 57.00 60.00

49.50 51.50 53.25 55.25 57.25 59.75

50.00 52.00 54.25 56.25 58.00 60.25

... ..

Pressure Class

GENERAL NOTES: (a) The inner-ring thickness shall be 0.117 in. to 0.131 in. (b) The inside diameter tolerance is 20.12 in. (c) These inner rings are suitable for use with pipe walls0.38 in. or thicker. NOTES: (1) Inner rings are required for Class 900 gaskets. (2)There are no Class 900 flanges NPS 50 and larger.

22


.. ... ... ...

4 5


ASME 816.20-1998

TABLE 14 INNER-RING INSIDE DIAMETERS FOR SPIRAL-WOUND GASKETS USED BETWEEN ASME B16.47 SERIES B FLANGES

39.75 41.75 43.75 45.75 47.75

51.88 56.25

49.50 51.75 55.25 58.19 59.75

Flange Site WS)

150

300

400

600

900 (1. 21

26 28 30 32 34 36

25.75 27.75 29.75 31.75 33.75 35.75

25.75 27.75 29.75 31.75 33.75 35.75

25.75 27.63 29.63 31.50 33.50 35.38

25.38 27.00 29.63 3 1.25 33.50 35.50

26.25 28.25 30.75 33.00 35.25 36.25

38 40 42 44 46 48

37.75

38.25 40.25 42.75 44.25 46.38 48.50

37.50 39.38 41.38 43.50 46.00 47.50

37.50 39.75 42.00 43.75 45.75

48.00

39.75 41.75 43.75 45.50 48.00 50.00

49.88 50 52 54 56.25 56 58 61.31 60

49.75

50.00 52.00

... ...

Pressure Class

5150

53.75 56.00

53.75

53.25

54.25

... ... ...

60.44

GENERAL NOTES: (a) The inner-ring thickness shall be 0.117 in. to 0.131 in. (b) The inside diameter tolerance is t0.12 in. (c) These inner rings are suitable for use with pipe walls 0.38 in. or thicker. NOTES: (1) Inner rings are required for Class 900 gaskets. (2) There are no Class 900 flanges NPS 50 and larger.

23


...

GASKETS METALLIC PIPE

ASME 816.20-1998

FOR

FLANGES

TABLE 15 MINIMUM PIPE WALL THICKNESS SUITABLE FOR USE WITH INNER RINGS FOR ASME 616.5 FLANGES Flange

Pressure Class

Size

INPSI

150

300

400

600

'h 74

900

1500

2500

Schedule 80

1 1'/4 1'/z 2 2'/2 3

40

4

5

Schedule 80

6

8 10 12 14 Schedule

16

10s

Schedule 30

18 20

24

24


Schedule 80


bi

e

-r

No flanges

75 I

(3) (2)

only

(2)

300

WN

SO flange flange, any bore

600 only

(2)

WN

900 (1)

WN flange with Schedule 10s bore described in ASME B36.19M [excludes nozzle (4) and SO flange] (5)

9 are bore.

only

(2)

2500

(1)

recommended

considering

(5)

the tolerances

No flanges

NOTES: (1) Inner rings are required for Class 900 gaskets, NPS 24; Class 1500 gaskets, NPS 12 through NPS 24; and Class 2500 gaskets, NPS 4 through NPS 12 (see para. 3.2.5). These inner rings may extend into the pipe bore a maximum of 0.06 in. under the worst combination of maximum bore, eccentric installation, and additive tolerances. (2) In these sizes the gasket is suitable for a welding neck flange with a standard wall bore, if the gasket and the flanges are assembled concentrically. This also applies to a nozzle. It is the user’s responsibility to determine if the gasket is satisfactory for a flange of any larger bore. (3) Gaskets in these sizes are suitable for slip-on flanges only if the gaskets and flanges are assembled concentrically. (4) A nozzle is a long welding neck; the bore equals the flange NPS. (5) An NPS 24 gasket is suitable for nozzles.

in Table flange

excludes

WN flange

(1)

WN flange with SW bore [includes nozzle (4) but excludes so flanael

1500

GASKETS

WN flange with Schedule 80 bore nozzle (4) and SO flange]

10s bore described in ASME (4) but excludes SO flange]

SO flange (3) flange, any bore

SO flange (3) WN flange, any bore

WN flange

Class

FOR USE WITH SPIRAL-WOUND

WN flange with Schedule B36.19M [includes nozzle

No flanges Use Class 600

400

Pressure

BORE OF ASME B16.5 FLANGES

SO flange (3) WN flange, any bore

SO flange WN flange

WN flange

150

MAXIMUM

GENERAL NOTES: (a) This table shows the maximum bore of flanges for which the spiral-wound gasket dimensions shown involved, possible eccentric installation, and the possibility that the gasket may extend into the assembled (b) For maximum permissible flange bores for nonmandatory inner rings, see Table 15. SW = standard wall WN = welding neck (c) Abbreviations: SO = slip on and threaded

24

20

18

16

14

12

10

8

6

4

3

Flang Size (NPS

TABLE 16

m s k 1,

$, 5

P

3

E

r 0 n-_

3 Y F

ASME 816.20-1998

FOR PIPE FLANGES

GASKETSMETALLIC

TABLE 17 MAXIMUM BORE OF ASME 816.47 SERIES A FLANGES FOR USE WITH SPIRAL-WOUND GASKETS Flange Size (NPS)

Pressure Class 150

400

300

600

900 (1)

26 28 30 32 34 36 38 40 42 44 46 48 50 52 56 58

60 GENERAL NOTE: This table shows the maximum bore of flanges for which the spiral-wound gasket dimensions shown in Table 10 are recommended, considering the tolerances involved, the possibility of eccentric installation, and the possibility that thegasket may extend into the assembled flange bore. NOTES: (1) Inner rings are required for Class 900 gaskets, NPS 26 through NPS 48 (see para. 3.2.5). (2) Applies only to welding neck flanges with a bore not larger than the inside diameter of a 0.187-in. wall pipe. Larger bores must be checked individually. (3) Applies only to welding neck flanges with a bore not larger than the inside diameter of a 0.25-in. wall pipe, except that NPS 38, Class 300, is not suitable for a bore larger than the inside diameter of a 0.30-in. wall pipe. Larger bores must be checked individually. (4) There are no Class 900 flanges in NPS 50 through 60.

26


STDeASHE B L b - Z O - E N G L 1778

GASKETS METALLIC

0757b70 ObLbSbb

743

m

ASME FOR PIPE FLANGES

816.20-1998

TABLE 18 MAXIMUM BOREOF ASME B16.47 SERIES B FLANGES FOR USE WITH SPIRAL-WOUND GASKETS Flange Size (NPS)

26 28 30 32 34 36 38 40 44 46 48 50 52 54 56 58 60

Pressure Class 150

300

400

600

900 (1)

Welding neck and integral flanges having maximum inside diameters as described in ASME 816.47

(2) (2) (2) (2) (2) (2)

GENERAL NOTE: This table shows the maximum bore of flanges for which the spiral-wound gasket dimensions shown in Table 11 are recommended, considering the tolerances involved, the possibility of eccentric installation, and the possibility that the gasket may extend into the assembled flange bore. NOTES: (1) Inner rings are required for Class 900 gaskets, NPS 26 through NPS 48 (see para. 3.2.5). (2) There are no Class 900 flanges NPS 50 and larger.

27


LIC 816.20-1998

ASME

PIPE

FOR

TABLE 19 COLOR CODING AND ABBREVIATIONS FOR SPIRAL-WOUND . GASKET MATERIALS Metallic Winding Materials Material

Abbreviation

Color Code

Carbon steel 304 SS 304 L SS

CRS 304 304 L

Silver Yellow No color

309 SS 310 SS 316 L SS

309 310 316 L

No color No color Green

347 SS 321 SS 430 SS

347 32 1 430

Blue Turquoise No color

Ni-Cu Monel 400 Grade 400

...

...

MON

Orange

Nickel 200 Titanium 20Cb-3 alloy

NI TI A-20

Red Purple Black

N¡-Mo Hastelloy B Grade B2

... HAST B

...

... Brown ...

...

...

Ni-Mo-Cr Hastelloy C Grade C-276 Ni-Cr-Fe lnconel 600 Grade 600 Ni-Cr-FeCb lnconel 625 Grade 625 Ni-Cr-Fe-Ti lnconel X-750 Grade X-750

...

HAST C

...

... INC 600

...

Beige

... ... Gold ...

... ...

...

INC 625

Gold

...

...

INX

No color

... ...

...

...

...

...

IN 800

White

Ni-Fe-C-Mo-Cu lncoloy 825 Grade 825

IN 825

White

Zirconium

ZlRC

No color

Ni-Fe-Cr lncoloy 800 Grade 800

... ...

...

28


... ...

...

FLANGES

GASKETS METALLIC PIPE 616.20-1998

ASME FOR

FLANGES

TABLE 19 COLOR CODING AND ABBREVIATIONS FOR SPIRAL-WOUND GASKET MATERIALS (CONT'D) Nonmetallic Filler Materials Material

Abbreviation

Chrysotile asbestos Polytetrafluoroethylene Mica-graphite Flexible-graphite Ceramic

AS6 PTFE Mfr.'s designation F.G. CER

Color Code

No stripe White stripe Pink stripe Gray stripe Light green stripe

TABLE 20 EXAMPLE MARKINGS FOR SPIRAL-WOUND GASKETS ~~

Description

Marking

NPS 3, Class 300 and 600 ASME 616.5 gasket and winding metal (Manufacturer's material filler graphite trademark) flexible a

Type having a

304

3-300/600-F.G. ASME 616.20

NPS 36, Class 300 ASME 616.47 Series A gasket having a Type 304 metal winding and a ceramic filler material

36-300"CER ASME 016.47 A (Manufacturer's trademark) ASME 616.20

12, NPS Class 1500 ASME 616.5 gasket winding, PTFE material, filler ring inconel inner an and

12-1500 INC 600-PTFE INC 600 I.R. (Manufacturer's trademark) ASME B16.20

having an inconel metal

29


Q

4

_I

L

I

Clearance 0.06 in.

Gasket inside diameter

Bolt-hole diameter

Gasket outside diameter

TABLE 21 JACKETED GASKET DIMENSIONS FOR ASME B16.5 FLANGES Gasket Inside Diameter (1)

Flange Size WS)

1 1Y4 15;

0.882.00 1.132.50 2.75 1.883.13 2.133.63

2 251,4.75 3 46.75 5 8.25

3.38 5.75 5.19 6.00 8.38

'12

3

14

2.88 5.00

4.25 7.00 9.38

8


ASME B16.20-1998

7.50 9.38 11.25 13.50 19.00 16.75 19.25 25.38 30.13

6 8 10 12 14 17.63

16 18 25.63 20 30.3824

Gasket Outside Diameterby Class (11 150

7.63

400 (2)

600

900 (31

1500

...

2.63 ... 2.88 3.25 ...

2.38 2.63 3.00 3.38 3.75

1.75 2.13 2.50 2.88 3.25

...

2.00 2.50 2.75 3.13 3.63

5.25

... ... 6.50 ...

4.25 5.00 5.75

... ... ...

6.75

...

... 4.50 ...

... .6.50 ..

5.50 6.38

2500 (4)

4.00

5.63

7.63

15.13 12.0013.75 10.8814.00

12.50

11.88

...

14.75 25.13

23.75 28.13

300

22.50

22.13

...

21.o0

21.00 25.25

...

31.O0 35.38

32.88

GENERAL NOTE: The gasket-thickness tolerance is +0.03 in., -0.000 in. NOTES: (1) For gaskets NPS '/2 through NPS 24, the outside and inside diameter tolerancesare +0.06 in., -0.000 in. (2) There are no Class 400 flanges NPS Y2 through NPS 3 (use Class 600). (3) There are no Class 900 flanges NPS through NPS21/2 (use Class 1500). (4) There are no Class 2500 flanges NPS 14 and larger.

30


... ...


"I thick

bolt hole

-

Clearance 0.06 in.

-+

PBolt-hole diameter

l-b

LGasket inside diameter Gasket outside diameter

TABLE 22 JACKETEDGASKET DIMENSIONS FOR ASME B16.47 SERIES A FLANGES Flange Size

32.75 35.25 37.38

0

.38

3 3

ASME 816.20-1998

30.38 32.63 34.63 42.13 41.50 38.88 36.50 38.50 40.50 42.50 46.50 48.50 50.50 52.50 54.50

60.63 62.63

63.13 65.38

Gasket Inside

Gasket Outside Diameterbv Class (11

26.50 26 28.50 28 30.50 30 40.13 39.383239.50 36.88 32.50 34.50 34 36 38 40 42 44

44.50

46 48 50 52 54

39.63

41.13 43.63 45.63 47.88 50.13

43.88 41.38 43.75 45.75 47.88

43.88 42.13 44.25 46.25 48.38

44.38 43.38 45.38 47.88 49.88

47.13 47.13 49.13 51.13 53.75

52.13 54.38 56.38 58.63 60.88

50.00 52.00 54.13 56.13 58.63

50.6356.38 52.8858.38 55.13 57.13 59.63

52.13 54.63 56.88 58.88 61.13

... ...

... ...

56.50 56 58.50 58 68.13 66.13 60 64.63 67.38 60.50

...

...

GENERAL NOTE: The gasket-thickness tolerance is +0.03 in., -0.000 in. NOTES: (1) For gaskets NPS 26 through NPS 60,the outside diameter and inside diameter tolerances are +0.13 in., -0.000 in. (2)There are no Class 900 flanges NPS 50 and larger.

31



ASME B16.20-1998

Q

1

L

Clearance 0.06 in.

4

Gasket inside diameter

Bolt-hole diameter

-k

Gasket outside diameter

TABLE 23 JACKETEDGASKET DIMENSIONS FOR ASME B16.47 SERIES B FLANGES Flange Size WS) ~

26.50 28.50 30.50 32.50

~~

Gasket Inside Diameter (1)

150

300

400

600

900 (2)

34.50

28.44 30.44 32.44 34.56 36.69

30.25 32.38 34.75 36.88 39.00

29.25 31-38 33.63 35.75 37.75

30.00 32.13 34.50 36.63 39.13

32.88 35.38 37.63 39.88 42.13

43.13 45.13 47.13 49.13

44.25 46.25 48.38

45.38 47.88 49.88

49.13 51.13 53.75

26 28 30 32 34 44.13 36.50 38.50

40.13

Gasket Outside Diameterby Class (1)

40.50 42.50 44.50

41.1336 38 40 42 44

41.13 38.75 47.13 43.38 41.O0 42.13 43.00 45.00 47.00

46.50 48.50 50.50 52.50 54.50

46 48 50 52 54

49.31 51.31 53.31 55.31 57.50

51.75 53.75 55.75 57.75 60.13

50.63 56.38 52.88 58.38 55.13 57.13 59.63

52.13 54.63 56.88 58.88 61.13

56.50 58.50

56 58 60

59.50 62.06 64.06

62.63 65.06 67.06

61.63. 63.63 66.13

63.13 65.38 68.13

60.50

... ... ... ... ...

...

GENERAL NOTE: The gasket-thickness tolerance is +0.03 in., -0.000 in. NOTES: (1) For gaskets NPS 26 through NPS 60, the outside diameter and inside diameter tolerances are +0.13 in., -0.000 in. (2) There are no Class 900 flanges NPS 50 and larger.

32



ASME 816.20-1998

TABLE 24 ABBREVIATIONS FOR IDENTIFYING MATERIALS FOR JACKETED GASKETS Material

Abbreviation Metals

MON

AI Aluminum CRS steel Carbon Cu Copper Ni-Mo (grade 82) 6 Hastelloy Ni-Mo-Cr (grade C-276) C Hastelloy Ni-Cr-Fe (grade 600) lnconel 600 Ni-Cr-Fe-Cb (grade 625) 625 INClnconel 625 Ni-Fe-Cr (grade 800) lncoloy 800 Ni-Cr-Fe-Ti (grade X-750) lnconel X-750 Ni-Cu (grade 400) Monel Nickel 200 Nickel Soft iron Soft iron Ni-Cr 3-digit steels Stainless Ta TANT Tantalum Ti TI Titanium

AL CS CU HAST B HAST C INC 600 IN 800 INX

NI

Soft iron

Fillers Asbestos Ceramic graphite Flexible Polytetrafluoroethylene

ASB CER F.G. PTFE

TABLE 25 EXAMPLE MARKINGS FORJACKETEDGASKETS Description

Marking

NPS 2'/2, Class150 ASME 816.5gasket havingaType 304 metal jacket andflexible a graphite filler material (Manufacturer's trademark)

2'/2-150-304/F.G. ASME 816.20

616.47 NPS 30, Class 300 ASME carbon-steel jacketceramic and a

Series B gaskethavinga30-300-CSKER filler material ASME 616.47 6 (Manufacturer's trademark) ASME 816.20

33


ASME B16.20-1998

MANDATORY ANNEX I REFERENCES

The following is a list of publications referenced in this Standard.

IS0 9000-2: 1997,Qualitymanagementand quality assurance standards - Part2: Generic guidelines for the application of IS0 9001, IS0 9002, and IS0 9003 IS0 9000-3: 1991,Qualitymanagementand quality assurance standards - Part 3: Guidelines for the application of IS0 9001 to the development, supply, installation, andmaintenanceof computer software IS0 9001: 1994, Quality systems - Model for quality assurance in design, development, production, installation, andservicing IS0 9002: 1994, Quality systems - Model for quality assurance in production, installation,and servicing IS0 9003: 1994, Quality systems - Model for quality assurance in finalinspectionandtest Publisher: International Organization for Standardization (EO), I rue de Varembé, Case postale 56, CH-I 121 Genève 20, Switzerland/Suisse

ASME B16.5-1996, Pipe Flanges and Flanged Fittings' ASME B 16.47-1996,LargeDiameterSteelFlanges: NPS 26 through NPS 60' ASME B36.1OM-1996, Welded and Seamless Wrought Steel Pipe' ASMEB36.19M-1985 (R1994), Stainless Steel Pipe' Publisher: AmericanSociety of MechanicalEngineers (ASME),Three Park Ave., New York, NY 10016; Order Department: 22 Law Drive, Box 2300, Fairfield, NJ 07007

IS0 9000-1: 1994,Qualitymanagementandquality assurance standards - Part 1 : Guidelines for selection anduse

'

API Specification 6A - 17th Edition - 1996, SpecificationforValvesandWellheadEquipment Publisher:AmericanPetroleumInstitute (API), 1220 L Street, NW,Washington, DC 20005

May also be obtainedfromtheAmericanNationalStandards Institute (ANSI), I I West 42nd Street, New York. NY 10036.

35

Previous pageis blank COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services

ASME 816.20-1998

NONMANDATORY ANNEX A QUALITY SYSTEM PROGRAM

The productsmanufactured in accordance withthis Standardshall be producedunder a qualitysystem programfollowingtheprinciples of an appropriate standardfromthe IS0 9000 series.’ A determination oftheneedforregistrationand/orcertificationofthe productmanufacturer’s quality systemprogram byan independentorganizationshall be theresponsibility of the manufacturer. Detailed documentationdemonstrating program compliance shall be available to the purchaser at the manufacturer’s facility. A written, summarized description of the program used by the product manufacturer shall be available to thepurchaserupon request. The product manufacturer is defined as the entity whose name or trademark appears on the product in accordance with the marking or identification requirements of this Standard.

’ The series is alsoavailable from the American NationalStandards

Institute (ANSI) andtheAmerican SocietyforQuality (ASQ)as American NationalStandards thatare identified by aprefix “Q’ replacing theprefix “ISO. Eachstandard of the seriesislisted in Annex I.

37

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STDaASME B L b * Z O - E N L L L778

0757b70 O b L b 7 7 5 75b W

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AMERICAN NATIONAL STANDARDS FOR PIPING. PIPE FLANGES. FITTLNGS. AND VALVES

.'.

Scheme for the Identification of PipingSystems ........................................................... .A13.1-1996 Pipe Threads. General Purpose (Inch)........................................................ .... 61.20.1-1983(R1992) Dryseal Pipe Threads (Inch)......................................................................... -61.20.3-1976(R1991) Cast Iron Pipe Flanges and Flanged Fittings:Classes 25, 125, and 250 ..................................... , .. .B16.1.1998 Malleable Iron Threaded Fittings: Classes 150 and 300 ...................................................... .B16.3.1998 Gray Iron Threaded Fittings: Classes 125 and 250 .......................................................... .B16.4.1998 Pipe Flanges and Flanged Fittings (NPS Through NPS 24) ................................................ .616.5.1996 Factory-Made Wrought Steel Buttwelding Fittings.......................................................... .B16.9.1993 Face-to-Face and End-to-End Dimensions of Valves ....................................................... .B16.10.1992 Forged Fittings, Socket-Weldingand Threaded............................................................ .B16.1 1.1996 Cast Iron Threaded Drainage Fittings .................................................................... .B16.12.4998 Ferrous Pipe Plugs, Bushings, and Locknutswith Pipe Threads.............................................. .B16.14.1991 Cast Bronze Threaded Fittings: Classes 125 and 250 ................................................ .B16.15.1985(R1994) Cast Copper Alloy Solder Joint Pressure Fittings................................................... .B16.1 8.1984(Rlg94) Metallic Gaskets for Pipe Flanges: Ring.Joint, Spiral.Wound. and Jacketed............................ i .B16.20.1998 Nonmetallic Flat Gaskets for Pipe Flanges................................................................ .B16.21.1992 Wrought Copper and Copper Alloy Solder Joint Pressure Fittings ........................................... .B16.22.1995 Cast Copper Alloy Solder Joint Drainage Fittings - DWV .................................................. .616.23.1992 Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300,400,600,900, 1500, and 2500 ... .B16.24.1991Wi1998) Buttwelding Ends...................... i ............................................................... .616.25.1997 Cast Copper Alloy Fittings forFlared Copper Tubes....................................................... .B16.26.1988 Wrought Steel Buttwelding Short Radius Elbows and Returns .B16.28.1994 Wrought Copper and Wrought Copper Alloy Solder Joint Drainage Fittings - DWV .......................... .B16.29.1994 Manually Operated Metallic Gas Valves for Use in Gas Piping Systems up f o 125 psig (Sizes 1/2 Through 2) ............................................................................... .616.3 3.1990 Valves - Flanged, Threaded. and Welding End........................................................... .B16.34.1996 Orifice Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 616.36-1996 Large Metallic Valves forGas Distribution (Manually Operated, NPS 2% to 12, 125 psig Maximum) ..... .B16.38.1985(R1994J Malleable Iron Threaded Pipe Unions...................................................................... .B16.39.1998 Manually Operated Thermoplastic Gas Shutoffs and Valvesin Gas Distribution Systems ............... .B16.40.1985(R1994) Ductile Iron Pipe Flanges and Flanged Fittings,Classes 150 and 300 .B164 2.1998 Manually Operated Metallic Gas Valves for Use in House Piping Systems .B16.44.1995 Cast Iron Fittings forSovent* Drainage Systems.......................................................... .B16.45.1998 Large Diameter SteelFlanges (NPS 26 Through NPS 60) .................................................... .B16.47.1996 Steel Line Blanks...................................................................................... .B16.48 .W97 Power Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 631.1-1995 Fuel Gas Piping (notan ANSI standard) .B31. 2.1968 Process Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B31.3.1999 Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids .................................. .B31.4.1992 Refrigeration Piping..................................................................................... .631.5.1992 Gas Transmission and Distribution Piping Systems......................................................... .B31.8.1995 Building Services Piping................................................................................. .631. 9.1996 Slurry Transportation Piping Systems .................................................................... .B31.1 1.1989 Manual for Determining the Remaining Strengthof Corroded Pipelines .B31G.1991 Welded and Seamless Wrought Steel Pipe.............................................................. B36.10M-1996 Stainless Steel Pipe............................................................................ 836.19M-l985(R1994) Self-operated and Power-Operated Safety-Related Valves Functional Specification Standard .N278. 1.1975(R1992)

......

..............................................

......................................... ...................................

...................................................................

......................................

............

. . The ASME Publications Catalog shows a complete list of all the Standardspublished by the Society: For a complimentary catalog. or the latest information about our publjcations. call 7-800-THE-ASME /1.800.843.2763) .

. .



Asme b16.20A- - Metal Gasket For Piping Flange (American standart)

Hydrogen piping and pipelines : ASME Code for Pressure Piping, B31

Piping Flexibility Analysis Criteria for ASME B31.3 Metallic Piping

design of ASME B31.3 metalic piping systems

Piping Systems Pipeline ASME Code Simplified

CASTI Guide to Asme B31.3 - Process Piping

Pipe Support Criteria for ASME B31.3 Metallic Piping

ASME Guide for Gas Transmission and Distribution Piping Systems, 1983

Piping Systems & Pipeline ASME B31 Code Simplified

Process Piping: The Complete Guide to Asme B31.3

Process Piping: The Complete Guide to Asme B31.3

Practice Standart for Work Breakdown Structures

Piping Handbook

Biosorbents for Metal Ions

Piping Engineering

Piping Engineering

Manual for determining the remaining strength of corroded pipelines : supplement to ASME B31 code for pressure piping

Piping Handbook

Piping Engineering Leadership for Process Plant Projects

Metal

Piping Engineering Leadership for Process Plant Projects

Piping Stress Handbook

Delphi. Страница Standart: Учебно-методическое пособие (практикум)

The Piping Guide: For the Design and Drafting of Industrial Piping Systems

Design of Piping Systems

Carrier Piping Design

Facility Piping Systems Handbook

Facility Piping Systems Handbook

Facility Piping Systems Handbook

Piping Systems Manual

Asme b16.20A- - Metal Gasket For Piping Flange (American standart)

Hydrogen piping and pipelines : ASME Code for Pressure Piping, B31

Piping Flexibility Analysis Criteria for ASME B31.3 Metallic Piping

design of ASME B31.3 metalic piping systems

Piping Systems Pipeline ASME Code Simplified

CASTI Guide to Asme B31.3 - Process Piping

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