1、AN AMERICAN NATIONAL STANDARDASME B16.20-2012(Revision of ASME B16.20-2007)Metallic Gaskets for Pipe Flanges Ring-Joint, Spiral-Wound, and JacketedASME B16.20-2012(Revision of ASME B16.20-2007)Metallic Gasketsfor Pipe FlangesRing-Joint, Spiral-Wound,and JacketedAN AMERICAN NATIONAL STANDARDTwo Park
2、Avenue New York, NY 10016 USADate of Issuance: June 25, 2013The next edition of this Standard is scheduled for publication in 2017.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically certain actions of the ASME B16 Committee may be p
3、ublished as Cases.Cases and interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org/ as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages toprovide corrections to incorrectly published items, or to
4、 correct typographical or grammatical errorsin codes and standards. Such errata shall be used on the date posted.The Committee Pages can be found at http:/cstools.asme.org/. There is an option available toautomatically receive an e-mail notification when errata are posted to a particular code or sta
5、ndard.This option can be found on the appropriate Committee Page after selecting “Errata” in the “PublicationInformation” section.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 f
6、or American NationalStandards. The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides
7、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 asse
8、rted in connection with anyitems mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expresslyadvised that determination of the val
9、idity of any such patent rights, and the risk of infringement of such rights, isentirely their own responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accept
10、s responsibility for only those interpretations of this document issued in accordance with the establishedASME 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
11、,without the prior written permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue, New York, NY 10016-5990Copyright 2013 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword vCommittee Roster . viCorrespondence With the B
12、16 Committee viiImportant Information Concerning Use of Asbestos or Alternative Materials viiiSummary of Changes xi1 Scope 12 Ring-Joint Gaskets 13 Spiral-Wound Gaskets . 24 Jacketed Gaskets 35 Grooved Metal Gaskets With Covering Layers . 3Figures1 Spiral-Wound Gaskets (Metric) . 52 Jacketed Gaskets
13、 (Metric) 53 Grooved Metal Gasket With Covering Layers . 64 Illustration of Example Markings for Grooved MetalGasket With Covering Layers 7Tables1 Maximum Hardness for Ring Gaskets 12 Ring Gasket Markings . 23 Type R Ring Gasket Dimensions and Tolerances 84 Pipe Sizes for Type R Ring Gaskets Suitabl
14、e for Referenced Standards . 115 Type RX Ring Gasket Dimensions and Tolerances . 136 Pipe Sizes for Type RX Ring Gaskets Suitable for Referenced Standards . 157 Type BX Ring Gasket Dimensions and Tolerances . 168 Pipe Sizes for Type BX Ring Gaskets Suitable for Referenced Standards . 179 Dimensions
15、for Spiral-Wound Gaskets Used With ASME B16.5 Flanges 1810 Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series A Flanges 1911 Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series B Flanges 2012 Inner-Ring Inside Diameters for Spiral-Wound Gaskets for Use With ASME B16.5Flang
16、es . 2113 Inner-Ring Inside Diameters for Spiral-Wound Gaskets Used Between ASMEB16.47 Series A Flanges 2214 Inner-Ring Inside Diameters for Spiral-Wound Gaskets Used Between ASMEB16.47 Series B Flanges 2315 Minimum Pipe Wall Thickness Suitable for Use of Spiral-Wound Gaskets WithInner Rings for ASM
17、E B16.5 Flanges . 2416 Maximum Bore of ASME B16.5 Flanges for Use With Spiral-Wound Gaskets . 2517 Maximum Bore of ASME B16.47 Series A Flanges for Use WithSpiral-Wound Gaskets . 2618 Maximum Bore of ASME B16.47 Series B Flanges for Use WithSpiral-Wound Gaskets . 2719 Color Coding and Abbreviations
18、for Spiral-Wound Gasket Materials 2820 Example Markings for Spiral-Wound Gaskets . 2921 Jacketed Gasket Dimensions for ASME B16.5 Flanges . 3022 Jacketed Gasket Dimensions for ASME B16.47 Series A Flanges . 3123 Jacketed Gasket Dimensions for ASME B16.47 Series B Flanges . 32iii24 Abbreviations for
19、Identifying Materials for Jacketed Gaskets 3325 Example Markings for Jacketed Gaskets 3326 Dimensions for Grooved Metal Gaskets With Covering Layers Used WithASME B16.5 Flanges . 3427 Dimensions for Grooved Metal Gaskets With Covering Layers Used WithASME B16.47 Series A Flanges . 3528 Dimensions fo
20、r Grooved Metal Gaskets With Covering Layers Used WithASME B16.47 Series B Flanges . 3629 Color Coding and Abbreviations for Grooved Metal Gaskets With Covering LayersMaterials 3730 Example Markings for Grooved Metal Gaskets With Covering Layers . 38Mandatory AppendicesI Dimensions of Gaskets in U.S
21、. Customary Units 39II References . 61Nonmandatory AppendixA Quality System Program . 62ivFOREWORDRing-joint gaskets and grooves probably originated in the boiler field, where they were usedin various forms for manhole covers, autoclaves, and other closures; however, it was in the oilindustry (both
22、in the production and refining of oil) that they received the greatest recognitionand were developed into their present form. Their use expanded steadily as temperatures andpressures were increased in steam plants. Tests examining their application in flanges and valveswere conducted as early as 192
23、8.In June 1936, the American Petroleum Institute (API) issued Tentative Standard 5-G-3 on Ring-Joints for Steel Flanges and Flange Unions for use with API Tubular Goods. This standard wasknown as API Specification 6B, Ring-Joint Flanges. Following the acceptance of ring-joints forflanges and valves
24、by API and the issuance of their standard, ASA B16e on Steel Pipe Flangesand Flanged Fittings was revised to include them, and the 1939 edition included standarddimensions for a full line of ring-joint flanges based on the API standard. Development workcontinued, and API formulated Standard 6E, Spec
25、ification for Wellhead Equipment, whichincluded ring-joints not covered in ASA B16e-1939.In 1949, the American Standards Association (ASA), Sectional Committee B16, Subcommittee3, Steel Flanges and Flanged Fittings, assembled the available information on ring-joint gasketsinto a single standard. ASA
26、 approval was granted on April 30, 1952, with the designationASA B16.20-1952.An updated version was submitted, and ASA approval was granted on April 4, 1955, with thedesignation ASA B16.20-1955. Ring gaskets for Class 900 (900 lb at that time) in sizes NPS 26through 36 were added, and ASA approval w
27、as granted on April 2, 1956. The standard wasreviewed in 1962, and approval was granted by the ASA on April 25, 1963.The standard was again reviewed and approval was granted by the American NationalStandards Institute (ANSI) on April 25, 1973, with the designation of an American NationalStandard.API
28、 requested that ASME convert their gasket standard, API 601, into an ASME AmericanNational Standard. As a result of that request, the standard was expanded to include requirementsfor spiral-wound and jacketed gaskets that were formerly listed in API 601, 7th edition, 1988.Also, ring-joint groove dim
29、ensions were not included, because they were included in ASME/ANSI B16.5-1988, Pipe Flanges and Flanged Fittings, and ASME B16.47-1990, Large DiameterSteel Flanges.The 1993 edition was approved by the B16 Standards Committee, and, following approval byASME, approval by ANSI was given on January 22,
30、1993, with the designation ASME B16.20-1993.In the 1998 edition of ASME B16.20, reference standards were updated, a quality systemprogram annex was added, inner ring inside diameters for spiral-wound gaskets were revised,and several editorial revisions were made. Following approval by ASME B16 Subco
31、mmittee G andthe B16 Main Committee, ANSI approved this American National Standard on November 20, 1998.In 2007, the Standard adopted metric dimensions as an independent standard to theU.S.Customary units, and Mandatory Appendix I was added to cover dimensional tables inU.S. Customary units.In 2012,
32、 the Standard introduced minor revisions to the material requirements for spiral-woundgaskets, along with the tables and figures. A new chapter has been included for Grooved MetalGaskets With Covering Layers, and Mandatory Appendix II has also been updated to ensurerelevancy.Following approval by B1
33、6 Subcommittee G, the Standards Committee, and ASME, ANSIapproved this American National Standard on October 22, 2012.vASME B16 COMMITTEEStandardization of Valves, Flanges, Fittings,and Gaskets(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE
34、 OFFICERSW. B. Bedesem, ChairG. A. Jolly, Vice ChairC. E. OBrien, SecretarySTANDARDS COMMITTEE PERSONNELA. Appleton, Alloy Stainless Products Co., Inc.R. W. Barnes, ANRIC Enterprises, Inc.W. B. Bedesem, ConsultantR. M. Bojarczuk, ExxonMobil Research however, they shouldnot contain proprietary names
35、or information.Requests that are not in this format will be rewritten in this format by the Committee priorto being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that migh
36、t affect an interpretation is available. Further, persons aggrieved by aninterpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The B16 St
37、andards Committee regularly holds meetings, whichare open to the public. Persons wishing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.viiIMPORTANT INFORMATION CONCERNING USE OFASBESTOS OR ALTERNATIVE MATERIALSAsbestos is referenced for use as a filler material in
38、metallic gaskets. It has served as a universalsealing material, compatible with most fluid services. It has been of extreme usefulness in minimiz-ing fire hazards.Certain serious adverse health effects are associated with asbestos, among them the seriousand often fatal diseases of lung cancer, asbes
39、tosis, and mesothelioma (a cancer of the chest andabdominal linings). The degree of exposure to asbestos varies with the product and the workpractices involved.Consult the most recent edition of the Occupational Safety and Health Administration, U.S.Department of Labor, Occupational Safety and Healt
40、h 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 FederalRegulations Sections 61.140 through 61.156; and the proposed rule by the U.S. Environ
41、mentalProtection Agency proposing labeling requirements 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 replaceasbestos in certain applications. Manufacturers an
42、d users are encouraged to develop and useeffective 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 particularmaterials and conditions
43、 should be obtained from ones employer, the manufacturer or supplierof that material, or the Material Safety Data Sheet.viiiASME B16.20-2012SUMMARY OF CHANGESFollowing approval by the B16 Committee and ASME, and after public review, ASME B16.20-2012was approved by the American National Standards Ins
44、titute on October 22, 2012.ASME B16.20-2012 consists of editorial changes, revisions, and corrections identified by a marginnote, (12), placed next to the affected area.Page Location Change1 1.1 Revised3 4.4 Revised in its entirety5 Added5 Fig. 1 AddedFig. 2 Added6 Fig. 3 Added7 Fig. 4 Added18 Table
45、 9 (1) General Note (b) revised(2) Notes (1) and (2) transposed19 Table 10 (1) Illustration removed(2) General Note (b) revised20 Table 11 (1) Illustration removed(2) General Note (b) revised28 Table 19 Revised30 Table 21 General Note (b) added31 Table 22 (1) Illustration removed(2) General Note (b)
46、 added32 Table 23 (1) Illustration removed(2) General Note (b) added34 Table 26 Added35 Table 27 Added36 Table 28 Added37 Table 29 Added38 Table 30 Added39 Fig. I-1 Added40 Fig. I-2 Added47 Table I-4 (1) General Note (b) revised(2) Notes (1) and (2) transposed48 Table I-5 (1) Illustration removed(2)
47、 General Note (b) revised49 Table I-6 (1) Illustration removed(2) General Note (b) revisedixPage Location Change55 Table I-12 (1) Illustration removed(2) General Note (b) added56 Table I-13 (1) Illustration removed(2) General Note (b) added57 Table I-14 (1) Illustration removed(2) General Note (b) a
48、dded58 Table I-15 Added59 Table I-16 Added60 Table I-17 Added61 Mandatory Appendix II Updatedx(12)ASME B16.20-2012METALLIC GASKETS FOR PIPE FLANGESRing-Joint, Spiral-Wound, and Jacketed1 SCOPE1.1 GeneralThis Standard covers materials, dimensions, toler-ances, and markings for metal ring-joint gasket
49、s, spiral-wound metal gaskets, metal-jacketed gaskets, andgrooved metal gaskets with covering layers. These gas-kets are dimensionally suitable for use with flangesdescribed in reference flange standards ASME B16.5,ASME B16.47, API Specification 6A, and ISO 10423.1.2 Quality SystemsRequirements relating to the product manufacturersquality system programs are described inNonmandatory Appendix A.1.3 ReferencesStandards and specifications adopted by reference inthis Standard are shown in Mandatory Appendix II,which is part of this Standard.1.4 Relevant UnitsThis Standard states values
