ASME B16.20:12/2017 - Metallic Gaskets for Pipe, Manuais, Projetos, Pesquisas de Matemática

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Metallic Gaskets

for Pipe Flanges

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

ASME B16.20-

(Revision of ASME B16.20-2012)

ASME B16.20-

(Revision of ASME B16.20-2012)

Metallic Gaskets

for Pipe Flanges

AN AMERICAN NATIONAL STANDARD

CONTENTS

Foreword........................................................................ v

Committee Roster.................................................................. vi

Correspondence With the B16 Committee................................................. vii

Important Information Concerning Use of Asbestos or Alternative Materials........................ ix

Summary of Changes................................................................

List of Changes in Record Number Order................................................. xi

PART GR General Requirements................................................. 1

GR-1 Scope.............................................................. 1

GR-2 Quality Systems....................................................... 1

GR-3 References.......................................................... 1

GR-4 Relevant Units........................................................ 1

PART RJ Ring-Joint Gaskets.................................................... 2

RJ-1 Types.............................................................. 2

RJ-2 Size............................................................... 2

RJ-3 Materials........................................................... 2

RJ-4 Marking............................................................ 2

RJ-5 Dimensions and Tolerances.............................................. 2

RJ-6 Surface Finish........................................................ 2

RJ-7 Identification Number.................................................. 2

PART SW Spiral-Wound Gaskets................................................. 15

SW-1 Size and Class........................................................ 15

SW-2 Dimensions and Tolerances.............................................. 15

SW-3 Materials........................................................... 16

SW-4 Marking............................................................ 16

PART JA Jacketed Gaskets..................................................... 33

JA-1 Size and Pressure Class................................................. 33

JA-2 Design............................................................. 33

JA-3 Dimensions and Tolerances.............................................. 33

JA-4 Materials........................................................... 33

JA-5 Marking............................................................ 33

PART GM Grooved Metal Gaskets With Covering Layers............................... 39

GM-1 Size and Class........................................................ 39

GM-2 Dimensions and Tolerances.............................................. 39

GM-3 Materials........................................................... 39

GM-4 Marking............................................................ 39

Mandatory Appendix

I References.......................................................... 48

iii

x

Nonmandatory Appendix

• A Quality System Program
• SW-2.1-1 Spiral-Wound Gasket Figures
• JA-3-1 Jacketed Gasket
• GM-2.1-1 Grooved Metal Gasket With Covering Layers
• GM-4.1-1 Illustration of Example Markings for Grooved Metal Gaskets With Covering Layers
• RJ-3.2-1 Maximum Hardness for Ring Gaskets Tables
• RJ-4-1 Ring Gasket Markings
• RJ-5-1 Type R Ring Gasket Dimensions and Tolerances
• RJ-5-2 Pipe Sizes for Type R Ring Gaskets Suitable for Referenced Standards
• RJ-5-3 Type RX Ring Gasket Dimensions and Tolerances
• RJ-5-4 Pipe Sizes for Type RX Ring Gaskets Suitable for Referenced Standards
• RJ-5-5 Type BX Ring Gasket Dimensions and Tolerances
• RJ-5-6 Pipe Sizes for Type BX Ring Gaskets Suitable for Referenced Standards
• SW-2.1-1 Dimensions for Spiral-Wound Gaskets Used With ASME B16.5 Flanges
• SW-2.1-2 Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series A Flanges
• SW-2.1-3 Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series B Flanges
• SW-2.1-4 Inside Diameters of Inner Rings for Spiral-Wound Gaskets for Use With ASME B16.5 Flanges
  • Flanges SW-2.1-5 Inside Diameters of Inner Rings for Spiral-Wound Gaskets Used Between ASME B16.47 Series A
  • Flanges SW-2.1-6 Inside Diameters of Inner Rings for Spiral-Wound Gaskets Used Between ASME B16.47 Series B
  • ASME B16.5 Flanges SW-2.5-1 Minimum Pipe Wall Thickness Suitable for Use of Spiral-Wound Gaskets With Inner Rings for
• SW-2.5-2 Maximum Bore of ASME B16.5 Flanges for Use With Spiral-Wound Gaskets
• SW-2.5-3 Maximum Bore of ASME B16.47 Series A Flanges for Use With Spiral-Wound Gaskets
• SW-2.5-4 Maximum Bore of ASME B16.47 Series B Flanges for Use With Spiral-Wound Gaskets
• SW-3-1 Color Coding and Abbreviations for Spiral-Wound Gasket Materials
• SW-4.1-1 Example Markings for Spiral-Wound Gaskets
• JA-3-1 Jacketed Gasket Dimensions for ASME B16.5 Flanges
• JA-3-2 Jacketed Gasket Dimensions for ASME B16.47 Series A Flanges
• JA-3-3 Jacketed Gasket Dimensions for ASME B16.47 Series B Flanges
• JA-4-1 Abbreviations for Identifying Materials for Jacketed Gaskets
• JA-5.1-1 Example Markings for Jacketed Gaskets
• GM-2.1-1 Dimensions for Grooved Metal Gaskets With Covering Layers Used With ASME B16.5 Flanges
  • Flanges GM-2.1-2 Dimensions for Grooved Metal Gaskets With Covering Layers Used With ASME B16.47 Series A
  • Flanges GM-2.1-3 Dimensions for Grooved Metal Gaskets With Covering Layers Used With ASME B16.47 Series B
• GM-3.1-1 Color Coding and Abbreviations for Grooved Metal Gaskets With Covering Layers Materials
• GM-4.1-1 Example Markings for Grooved Metal Gaskets With Covering Layers

ASME B16 COMMITTEE

Standardization of Valves, Flanges, Fittings, and Gaskets

(The following is the roster of the Committee at the time of approval of this Standard.)

STANDARDS COMMITTEE OFFICERS R. M. Bojarczuk, Chair C. E. Davila, Vice Chair C. R. Ramcharran, Secretary

STANDARDS COMMITTEE PERSONNEL

A. Appleton, Alloy Stainless Products Co., Inc. J. E. Barker, Dezurik Water Controls K. Barron, Ward Manufacturing D. C. Bayreuther, Metso Automation, Flow Control Division W. B. Bedesem, Consultant R. M. Bojarczuk, ExxonMobil Research & Engineering Co. A. M. Cheta, Qatar Shell GTL M. A. Clark, NIBCO, Inc. G. A. Cuccio, Capitol Manufacturing Co. J. D’Avanzo, Fluoroseal Valves C. E. Davila, Crane Energy K. S. Felder, Valero Energy D. R. Frikken, Becht Engineering Co. R. B. Hai, RBH Associates D. Hunt, Jr., Fastenal Co. G. A. Jolly, Samshin, Ltd. E. J. Lain, Exelon Nuclear T. A. McMahon, Emerson Process Management

R. C. Merrick, Fluor Enterprises M. L. Nayyar, NICE W. H. Patrick, Dow Chemical Co. D. Rahoi, CCM 2000 C. R. Ramcharran, The American Society of Mechanical Engineers D. F. Reid, VSP Technologies R. A. Schmidt, Canadoil J. Tucker, Flowserve F. R. Volgstadt, Volgstadt & Associates, Inc. F. Feng, Delegate, China Productivity Center for Machinery, National Technical Committee R. Barnes, Contributing Member, Anric Enterprises, Inc. P. V. Craig, Contributing Member, Jomar Group B. G. Fabian, Contributing Member, Pennsylvania Machine Works M. Katcher, Contributing Member, Haynes International A. G. Kireta, Jr., Contributing Member, Copper Development Association, Inc.

SUBCOMMITTEE G — GASKETS FOR FLANGED JOINTS

D. F. Reid, Chair, VSP Technologies E. J. Lain, Vice Chair, Exelon Nuclear C. Ramcharran, Secretary, The American Society of Mechanical Engineers J. Baulch, Teadit North America R. M. Bojarczuk, ExxonMobil Research & Engineering Co. K. S. Felder, Valero Energy P. R. Francis, Thermoseal, Inc. D. R. Frikken, Becht Engineering Co. K. E. Guenther, Shell

E. Jamalyaria, Flexitallic Engineering Y. Li, Flexitallic L.P. L. Melvin, Leader Global Technologies, Inc. R. T. Mueller, Consultant D. Reeves, Sealing and Bolting Technologies, LLC M. Ruffin, Chevron C. Yoder, Garlock Sealing Technologies H. Azibert, Contributing Member, Camtrack, LLC D. H. Monroe, Contributing Member, Consultant

vi

CORRESPONDENCE WITH THE B16 COMMITTEE

General. ASME Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users of this Standard may interact with the Committee by requesting interpretations, proposing revisions or a case, and attending Committee meetings. Correspondence should be addressed to:

Secretary, B16 Standards Committee The American Society of Mechanical Engineers Two Park Avenue New York, NY 10016- http://go.asme.org/Inquiry

Proposing Revisions. Revisions are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Standard. Approved revisions will be published periodically. The Committee welcomes proposals for revisions to this Standard. Such proposals should be as specific as possible, citing the paragraph number(s), the proposed wording, and a detailed description of the reasons for the proposal, including any pertinent documentation.

Proposing a Case. Cases may be issued to provide alternative rules when justified, to permit early implementation of an approved revision when the need is urgent, or to provide rules not covered by existing provisions. Cases are effective immediately upon ASME approval and shall be posted on the ASME Committee Web page. Requests for Cases shall provide a Statement of Need and Background Information. The request should identify the Standard and the paragraph, figure, or table number(s), and be written as a Question and Reply in the same format as existing Cases. Requests for Cases should also indicate the applicable edition(s) of the Standard to which the proposed Case applies.

Interpretations. Upon request, the B16 Standards Committee will render an interpretation of any requirement of the Standard. Interpretations can only be rendered in response to a written request sent to the Secretary of the B16 Standards Committee. Requests for interpretation should preferably be submitted through the online Interpretation Submittal Form. The form is accessible at http://go.asme.org/InterpretationRequest. Upon submittal of the form, the Inquirer will receive an automatic e-mail confirming receipt. If the Inquirer is unable to use the online form, he/she may e-mail the request to the Secretary of the B16 Standards Committee at SecretaryB16@asme.org, or mail it to the above address. The request for an interpretation should be clear and unambiguous. It is further recommended that the Inquirer submit his/her request in the following format:

Subject: Cite the applicable paragraph number(s) and the topic of the inquiry in one or two words. Edition: Cite the applicable edition of the Standard for which the interpretation is being requested. Question: Phrase the question as a request for an interpretation of a specific requirement suitable for general understanding and use, not as a request for an approval of a proprietary design or situation. Please provide a condensed and precise question, composed in such a way that a “yes” or “no” reply is acceptable. Proposed Reply(ies): Provide a proposed reply(ies) in the form of “Yes” or “No,” with explanation as needed. If entering replies to more than one question, please number the questions and replies. Background Information: Provide the Committee with any background information that will assist the Committee in understanding the inquiry. The Inquirer may also include any plans or drawings that are necessary to explain the question; however, they should not contain proprietary names or information.

Requests that are not in the format described above may be rewritten in the appropriate format by the Committee prior to being answered, which may inadvertently change the intent of the original request.

vii

IMPORTANT INFORMATION CONCERNING USE OF ASBESTOS OR

ALTERNATIVE MATERIALS

Asbestos is referenced for use as a filler material in metallic gaskets. It has served as a universal sealing material, compatible with most fluid services. It has been of extreme usefulness in minimizing fire 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 and abdominal linings). The degree of exposure to asbestos varies with the product and the work practices involved.

Consult the most recent edition of the Occupational Safety and Health Administration, U.S. Department of Labor, Occupational Safety and Health Standard for Asbestos, Tremolite, Anthophyllite, and Actinolite, 29 Code of Federal Regulations Section 1910.1001; the U.S. Environmental Protection Agency National Emission Standard for Asbestos, 40 Code of Federal Regulations Sections 61.140 through 61.156; and the U.S. Environmental Protection Agency rule requiring the labeling and phased banning of asbestos products, published at 51 Federal Register 3738-3759 (January 29, 1986).

There are currently in use and under development a number of substitute materials to replace asbestos in certain applications. Manufacturers and users are encouraged to develop and use effective substitute materials that can meet the specifications for, and operating requirements of, the equipment to which they would apply.

Information concerning safety and health risks and proper precautions with respect to particular materials and condi- tions should be obtained from one’s employer, the manufacturer or supplier of that material, or the Material Safety Data Sheet.

ix

ASME B16.20-

SUMMARY OF CHANGES

Following approval by the B16 Committee and ASME, and after public review, ASME B16.20-2017 was approved by the American National Standards Institute on October 11, 2017.

ASME B16.20-2017 has been revised in its entirety. The Standard title has been revised (13-901) ; the paragraphs, figures, and tables have been restructured and redesignated (14-756) ; and cross-references have been updated accordingly. In addition, this edition includes the following changes identified by a margin note, (17). The Record Numbers cited above and listed below are explained in more detail in “List of Changes in Record Number Order” following this Summary of Changes.

Page Location Change (Record Number) 15 SW-2.2 Formerly para. 3.2.2; revised (16-2540) 16 SW-2.6 Formerly para. 3.2.6; revised (12-519, 16- 2540) 17 Figure SW-2.1-1 Formerly Figures 1 and I-1; revised (14-750) 18 Table SW-2.1-1 Formerly Tables 9 and I-4; values for NPS 3½ added and Notes revised (16-2147) 20 Table SW-2.1-2 Formerly Tables 10 and I-5; General Notes and Note (2) revised (13-914) 22 Table SW-2.1-3 Formerly Tables 11 and I-6; under “U.S. Customary, in.,” Inside Diameter of Gasket for NPS 38 and NPS 58, and Outside Diameter of Gasket for NPS 56 revised; and Note (2) revised (13-914) 24 Table SW-2.1-4 Formerly Tables 12 and I-7; values for NPS 3½ added and Note (1) revised (16-2147) 40 Figure GM-2.1-1 Formerly Figure 3; revised (14-758)

x

INTENTIONALLY LEFT BLANK

xii

PART GR

GENERAL REQUIREMENTS

GR-1 SCOPE

This Standard covers materials, dimensions, tolerances, and markings for metal ring-joint gaskets, spiral-wound metal gaskets, metal-jacketed gaskets, and grooved metal gaskets with covering layers. These gaskets are dimen- sionally suitable for use with flanges described in refer- ence flange standards ASME B16.5, ASME B16.47, API Specification 6A, and ISO 10423.

GR-2 QUALITY SYSTEMS

Requirements relating to the product manufacturers’ q u a l i t y s y s t e m p r o g r a m s a r e d e s c r i b e d i n Nonmandatory Appendix A.

GR-3 REFERENCES Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix I.

GR-4 RELEVANT UNITS This Standard states values in both SI (Metric) and U.S. Customary units. These systems of units are to be regarded separately as standard. Within the text, the U.S. Customary units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Combining values from the two systems constitutes nonconformance with the Standard.

ASME B16.20-

1

Table RJ-3.2-1 Maximum Hardness for Ring Gaskets

Ring Gasket Material

Maximum Hardness Brinell Rockwell “B” Scale Soft iron [Note (1)] 90 56 Low-carbon steel 120 68 4–6 chrome 1 ∕ 2 Mo 130 72 Type 410 170 86 Type 304 160 83 Type 316 160 83 Type 347 160 83

NOTE: (1) May be low-carbon steel, not to exceed maximum hardness of 90 Brinell — 56 Rockwell “B.”

Table RJ-4-1 Ring Gasket Markings

Ring Gasket Material Identification

Marking Example [Note (1)] Soft iron [Note (2)] D R51D Low-carbon steel S R51S 4–6 chrome 1 ∕ 2 Mo F5 [Note (3)] R51F Type 410 S 410 R51S Type 304 S 304 R51S Type 316 S 316 R51S Type 347 S 347 R51S

NOTES: (1) This number shall be preceded 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 A182-72 chem- ical composition requirements only.

ASME B16.20-

3

Table RJ-5-1 Type R Ring Gasket Dimensions and Tolerances

Ring Number

Average Pitch Diameter of Ring, P , mm (in.)

Width of Ring, A , mm (in.)

Height of Ring, mm (in.) (^) Width of Flat on Octagonal Ring, C , mm (in.)

Radius in Octagonal Ring, R 1 , mm (in.)

Oval, B

Octagonal, H R-11 34.14 (1.344) 6.35 (0.250) 11.2 (0.44) 9.7 (0.38) 4.32 (0.170) 1.5 (0.06) R-12 39.70 (1.563) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-13 42.88 (1.688) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-14 44.45 (1.750) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-15 47.63 (1.875) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06)

R-16 50.80 (2.000) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-17 57.15 (2.250) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-18 60.33 (2.375) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-19 65.10 (2.563) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-20 68.28 (2.688) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06)

R-21 72.24 (2.844) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-22 82.55 (3.250) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-23 82.55 (3.250) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-24 95.25 (3.750) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-25 101.60 (4.000) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06)

R-26 101.60 (4.000) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-27 107.95 (4.250) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-28 111.13 (4.375) 12.70 (0.500) 19.1 (0.75) 17.5 (0.69) 8.66 (0.341) 1.5 (0.06) R-29 114.30 (4.500) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-30 117.48 (4.625) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06)

R-31 123.83 (4.875) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-32 127.00 (5.000) 12.70 (0.500) 19.1 (0.75) 17.5 (0.69) 8.66 (0.341) 1.5 (0.06) R-33 131.78 (5.188) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-34 131.78 (5.188) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-35 136.53 (5.375) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06)

R-36 149.23 (5.875) 7.95 (0.313) 14.2 (0.56) 12.7 (0.50) 5.23 (0.206) 1.5 (0.06) R-37 149.23 (5.875) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-38 157.18 (6.188) 15.88 (0.625) 22.4 (0.88) 20.6 (0.81) 10.49 (0.413) 1.5 (0.06) R-39 161.93 (6.375) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06)

ASME B16.20-

4

Table RJ-5-1 Type R Ring Gasket Dimensions and Tolerances (Cont’d)

Ring Number

Average Pitch Diameter of Ring, P , mm (in.)

Width of Ring, A , mm (in.)

Height of Ring, mm (in.) (^) Width of Flat on Octagonal Ring, C , mm (in.)

Radius in Octagonal Ring, R 1 , mm (in.)

Oval, B

Octagonal, H R-81 635.00 (25.000) 14.30 (0.563) … 19.1 (0.75) 9.58 (0.377) 1.5 (0.06) R-82 57.15 (2.250) 11.13 (0.438) … 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-84 63.50 (2.500) 11.13 (0.438) … 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-85 79.38 (3.125) 12.70 (0.500) … 17.5 (0.69) 8.66 (0.341) 1.5 (0.06)

R-86 90.50 (3.563) 15.88 (0.625) … 20.6 (0.81) 10.49 (0.413) 1.5 (0.06) R-87 100.03 (3.938) 15.88 (0.625) … 20.6 (0.81) 10.49 (0.413) 1.5 (0.06) R-88 123.83 (4.875) 19.05 (0.750) … 23.9 (0.94) 12.32 (0.485) 1.5 (0.06) R-89 114.30 (4.500) 19.05 (0.750) … 23.9 (0.94) 12.32 (0.485) 1.5 (0.06) R-90 155.58 (6.125) 22.23 (0.875) … 26.9 (1.06) 14.81 (0.583) 1.5 (0.06)

R-91 260.35 (10.250) 31.75 (1.250) … 38.1 (1.50) 22.33 (0.879) 2.3 (0.09) R-92 228.60 (9.000) 11.13 (0.438) 17.5 (0.69) 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-93 749.30 (29.500) 19.05 (0.750) … 23.9 (0.94) 12.32 (0.485) 1.5 (0.06) R-94 800.10 (31.500) 19.05 (0.750) … 23.9 (0.94) 12.32 (0.485) 1.5 (0.06) R-95 857.25 (33.750) 19.05 (0.750) … 23.9(0.94) 12.32 (0.485) 1.5 (0.06)

R-96 914.40 (36.000) 22.23 (0.875) … 26.9 (1.06) 14.81 (0.583) 1.5 (0.06) R-97 965.20 (38.000) 22.23 (0.875) … 26.9 (1.06) 14.81 (0.583) 1.5 (0.06) R-98 1 022.35 (40.250) 22.23 (0.875) … 26.9 (1.06) 14.81 (0.583) 1.5 (0.06) R-99 234.95 (9.250) 11.13 (0.438) … 16.0 (0.63) 7.75 (0.305) 1.5 (0.06) R-100 749.30 (29.500) 28.58 (1.125) … 35.1 (1.38) 19.81 (0.780) 2.3 (0.09)

R-101 800.10 (31.500) 31.75 (1.250) … 38.1 (1.50) 22.33 (0.879) 2.3 (0.09) R-102 857.25 (33.750) 31.75 (1.250) … 38.1 (1.50) 22.33 (0.879) 2.3 (0.09) R-103 914.40 (36.000) 31.75 (1.250) … 38.1 (1.50) 22.33 (0.879) 2.3 (0.09) R-104 965.20 (38.000) 34.93 (1.375) … 41.4 (1.63) 24.82 (0.977) 2.3 (0.09) R-105 1 022.35 (40.250) 34.93 (1.375) … 41.4 (1.63) 24.82 (0.977) 2.3 (0.09)

GENERAL NOTE: Tolerances: 23 deg = angle, ±0 deg 30 min (±^1 / 2 deg) A = width of ring, ±0.20 mm (±0.008 in.) B, H = height of ring, +1.3 mm, −0.5 mm (+0.05 in., −0.02 in.) Variation in height throughout the entire circumference of any given ring shall not exceed 0.5 mm (0.02 in.) within these tolerances. C = width of flat on octagonal ring, ±0.20 mm (±0.008 in.) P = average pitch diameter of ring, ±0.18 mm (±0.007 in.) R 1 = radius in ring, ±0.5 mm (±0.02 in.)

ASME B16.20-

6

Table RJ-5-2 Pipe Sizes for Type R Ring Gaskets Suitable for Referenced Standards

Ring Number

Pressure Classes ASME B16.5 API 6B ASME B16.47 Series A

150 300–600 900 1500 2500

[Note (1)] 2000 3000 5000 150 300–600 900 R-11 … 1 ∕ 2 … … … … … … … … … … R-12 … … 1 ∕ 2 1 ∕ 2 … … … … … … … … R-13 … 3 ∕ 4 … … 1 ∕ 2 … … … … … … … R-14 … … 3 ∕ 4 3 ∕ 4 … … … … … … … … R-15 1 … … … … … … … … … … …

R-16 … 1 1 1 3 ∕ 4 1 1 1 1 … … …

R-17 11 ∕ 4 … … … … … … … … … … …

R-18 … 11 ∕ 4 11 ∕ 4 11 ∕ 4 1 11 ∕ 4 11 ∕ 4 11 ∕ 4 11 ∕ 4 … … …

R-19 11 ∕ 2 … … … … … … … … … … …

R-20 … 11 ∕ 2 11 ∕ 2 11 ∕ 2 … 11 ∕ 2 11 ∕ 2 11 ∕ 2 11 ∕ 2 … … …

R-21 … … … … 11 ∕ 4 … … … … … … …

R-22 2 … … … … … … … … … … …

R-23 … 2 … … 11 ∕ 2 2 2 … … … … …

R-24 … … 2 2 … … … 2 2 … … …

R-25 21 ∕ 2 … … … … … … … … … … …

R-26 … 21 ∕ 2 … … 2 21 ∕ 2 21 ∕ 2 … … … … …

R-27 … … 21 ∕ 2 21 ∕ 2 … … … 21 ∕ 2 21 ∕ 2 … … …

R-28 … … … … 21 ∕ 2 … … … … … … …

R-29 3 … … … … … … … … … … …

R-30 [Note (2)] … 3 … … … … … … … … … …

R-31 … 3 3 … … 3 3 3 … … … …

R-32 … … … … 3 … … … … … … …

R-33 31 ∕ 2 … … … … … … … … … … …

R-34 … 31 ∕ 2 … … … … … … … … … …

R-35 … … … 3 … … … … 3 … … …

R-36 4 … … … … … … … … … … …

R-37 … 4 4 … … 4 4 4 31 ∕ 2 … … …

R-38 … … … … 4 … … … … … … …

R-39 … … … 4 … … … … 4 … … …

R-40 5 … … … … … … … … … … …

R-41 … 5 5 … … 5 5 5 … … … …

R-42 … … … … 5 … … … … … … …

R-43 6 … … … … … … … … … … …

R-44 … … … 5 … … … … 5 … … …

R-45 … 6 6 … … 6 6 6 … … … …

R-46 … … … 6 … … … … 6 … … …

R-47 … … … … 6 … … … … … … …

R-48 8 … … … … … … … … … … …

R-49 … 8 8 … … 8 8 8 … … … …

R-50 … … … 8 … … … … 8 … … …

ASME B16.20-

7