1、Metallic Gaskets for Pipe Flanges AN AMERICAN NATIONAL STANDARD ASME B16.20-2017 (Revision of ASME B16.20-2012)ASME B16.20-2017 (Revision of ASME B16.20-2012) Metallic Gaskets for Pipe Flanges AN AMERICAN NATIONAL STANDARD xDate of Issuance: December 29, 2017 The next edition of this Standard is sch
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11、permission of the publisher . The American Society of Mechanical Engineers Two Park Avenue, New York, NY 10016-5990 Copyright 2017 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All rights reserved Printed in U.S.A.CONTENTS Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Committee Roster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi Correspondence With the B16 Committee . . . . . . . . . . . . . . .
13、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Important Information Concerning Use of Asbestos or Alternative Materials . . . . . . . . . . . . . . . . . . . . . . . . ix Summary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、. . . . . . . . . . . . . . . . . . . . . . List of Changes in Record Number Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi PART GR General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15、 . . . . . 1 GR-1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 GR-2 Quality Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 GR-3 References .
16、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 GR-4 Relevant Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 PART RJ Ring-Joint Gaskets . . . . . . . . . . .
17、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 RJ-1 Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 RJ-2 Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 RJ-3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 RJ-4 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、 . . . . . . . . . . . . . 2 RJ-5 Dimensions and Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 RJ-6 Surface Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 RJ-7 Identif
20、ication Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 PART SW Spiral- Wound Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 SW-1 Size and Class . . . . . . . . . . . . . . . .
21、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 SW-2 Dimensions and Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 SW-3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22、. . . . . . . . . . . . . . . . . . . . . 16 SW-4 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 PART JA Jacketed Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23、. . . . . . 33 JA-1 Size and Pressure Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 JA-2 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 JA-3 Dimensions an
24、d Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 JA-4 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 JA-5 Marking . . . . . . . . . . . . . . . . . . . . . .
25、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 PART GM Grooved Metal Gaskets With Covering Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 GM-1 Size and Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26、. . . . . . . . . . . . . . 39 GM-2 Dimensions and Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 GM-3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 GM-4 Ma
27、rking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Mandatory Appendix I References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 iii xNonmandatory Ap
28、pendix A Quality System Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Figures SW-2.1-1 Spiral- Wound Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 JA-3-1 Jacketed Gasket .
29、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 GM-2.1-1 Grooved Metal Gasket With Covering Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 GM-4.1-1 Illustration of Example Markings for Grooved Metal Gasket
30、s With Covering Layers . . . . . . 47 Tables RJ-3.2-1 Maximum Hardness for Ring Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 RJ-4-1 Ring Gasket Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 RJ
31、-5-1 Type R Ring Gasket Dimensions and Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 RJ-5-2 Pipe Sizes for Type R Ring Gaskets Suitable for Referenced Standards . . . . . . . . . . . . . . . 7 RJ-5-3 Type RX Ring Gasket Dimensions and Tolerances . . . . . . . . . . . . .
32、 . . . . . . . . . . . . . . . . . 10 RJ-5-4 Pipe Sizes for Type RX Ring Gaskets Suitable for Referenced Standards . . . . . . . . . . . . . . 12 RJ-5-5 Type BX Ring Gasket Dimensions and Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 RJ-5-6 Pipe Sizes for Type BX Ring Gas
33、kets Suitable for Referenced Standards . . . . . . . . . . . . . . 14 SW-2.1-1 Dimensions for Spiral- Wound Gaskets Used With ASME B16.5 Flanges . . . . . . . . . . . . . . . 18 SW-2.1-2 Dimensions for Spiral- Wound Gaskets Used With ASME B16.47 Series A Flanges . . . . . . . . 20 SW-2.1-3 Dimension
34、s for Spiral- Wound Gaskets Used With ASME B16.47 Series B Flanges . . . . . . . . 22 SW-2.1-4 Inside Diameters of Inner Rings for Spiral- Wound Gaskets for Use With ASME B16.5 Flanges 24 SW-2.1-5 Inside Diameters of Inner Rings for Spiral- Wound Gaskets Used Between ASME B16.47 Series A Flanges . .
35、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 SW-2.1-6 Inside Diameters of Inner Rings for Spiral- Wound Gaskets Used Between ASME B16.47 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36、 . . . . . . . . . . . . . . . . . . . . . . 26 SW-2.5-1 Minimum Pipe Wall Thickness Suitable for Use of Spiral- Wound Gaskets With Inner Rings for ASME B16.5 Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 SW-2.5-2 Maximum Bore of ASME B1
37、6.5 Flanges for Use With Spiral- Wound Gaskets . . . . . . . . . . . 28 SW-2.5-3 Maximum Bore of ASME B16.47 Series A Flanges for Use With Spiral- Wound Gaskets . . . . 29 SW-2.5-4 Maximum Bore of ASME B16.47 Series B Flanges for Use With Spiral- Wound Gaskets . . . . 30 SW-3-1 Color Coding and Abbr
38、eviations for Spiral- Wound Gasket Materials . . . . . . . . . . . . . . . . . 31 SW-4.1-1 Example Markings for Spiral- Wound Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 JA-3-1 Jacketed Gasket Dimensions for ASME B16.5 Flanges . . . . . . . . . . . . . . . . . . .
39、. . . . . . . . . 35 JA-3-2 Jacketed Gasket Dimensions for ASME B16.47 Series A Flanges . . . . . . . . . . . . . . . . . . . . 36 JA-3-3 Jacketed Gasket Dimensions for ASME B16.47 Series B Flanges . . . . . . . . . . . . . . . . . . . . 37 JA-4-1 Abbreviations for Identifying Materials for Jacketed
40、 Gaskets . . . . . . . . . . . . . . . . . . . . . . . 38 JA-5.1-1 Example Markings for Jacketed Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 GM-2.1-1 Dimensions for Grooved Metal Gaskets With Covering Layers Used With ASME B16.5 Flanges 41 GM-2.1-2 Dimensions
41、 for Grooved Metal Gaskets With Covering Layers Used With ASME B16.47 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 GM-2.1-3 Dimensions for Grooved Metal Gaskets With Covering Layers Used With ASME B16.47 Ser
42、ies B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 GM-3.1-1 Color Coding and Abbreviations for Grooved Metal Gaskets With Covering Layers Materials 46 GM-4.1-1 Example Markings for Grooved Metal Gaskets With Covering
43、 Layers . . . . . . . . . . . . . . . . . 47 ivFOREWORD Ring-joint gaskets and grooves probably originated in the boiler field, where they were used in various forms for manhole covers, autoclaves, and other closures; however, it was in the oil industry (both in the production and refining of oil) t
44、hat they received the greatest recognition and were developed into their present form. Their use expanded steadily as temperatures and pressures were increased in steam plants. Tests examining their application in flanges and valves were conducted as early as 1928. In June 1936, the American Petrole
45、um 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 was known as API Specification 6B, Ring-Joint Flanges. Following the acceptance of ring-joints for flanges and valves by API and the issuance of their s
46、tandard, ASA B16e on Steel Pipe Flanges and Flanged Fittings was revised to include them, and the 1939 edition included standard dimensions for a full line of ring-joint flanges based on the API standard. Development work continued, and API formulated Standard 6E, Specification for Wellhead Equipmen
47、t, which included ring-joints not covered in ASA B16e-1939. In 1949, the American Standards Association (ASA), Sectional Committee B16, Subcommittee 3, Steel Flanges and Flanged Fittings, assembled the available information on ring-joint gaskets into a single standard. ASA approved the Standard, wit
48、h the designation ASA B16.20-1952, on April 30, 1952. On April 4,1955, ASA approved an updated edition with the designation ASA B16.20-1955. Ring gaskets for Class 900 (900 lb at that time) in sizes NPS 26 through NPS 36 were added in the next edition, which ASA approved on April 2, 1956. The Standa
49、rd was again reviewed in 1962, and ASA approved it on April 25, 1963. In 1973, the Standard was revised, and the American National Standards Institute (ANSI) approved it as an American National Standard. Following publication of the 1973 edition, API requested that ASME convert their gasket standard, API 601, into an ASME American National Standard. As a result of that request, the Standard was expanded to include requirements for spiral-wound and jacketed gaskets that were formerly listed in API 601, 7th edition, 1988. Ring-joint groove dimensions were not included, because they were incl
