ASMEB16.20-2023 (Revision ofASME B16.20-2017) Metallic Gaskets for Pipe Flanges AN AMERICANNATIONALSTANDARD The American Societyof Mechanical Engineers
ASMEB16.20-2023 (Revision ofASMEB16.20-2017) Metallic Gaskets for Pipe Flanges ANAMERICAN NATIONAL STANDARD TheAmericanSocietyof Mechanical Engineers Two Park Avenue New York NY 10016 USA
Date of Issuance: December 22 2023 The next edition of this Standard is scheduled for publication in 2028. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The standards mitee that approved the code or standard was balanced to ensure that individuals from petent and concerned interests had an opportunity to participate. The proposed code or standard was made available for public review and ment which provided an opportunity for additional public input from industry academia regulatory agencies and the public-at-large. ASME does not“approve certify rate orendorse” any item construction proprietary device r activity. ASME does t take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document and does not undertake to insure anyone utilizing a standard against liabilit for infringement of any applicable letters patent nor does ASME assume 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 representatives or persons afiliated with 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 ssued in accordance with the established ASME procedures and policies which precludes the ssuance of interpretations by individuals. The endnotes and preamble in this document (if any) are part of this American National Standard. E米S ASME Collective Membership Mark “ASME* and the above ASME symbol are registered trademarks of The American Society of Mechanical Engineers. No part of this document may be reproduced in any form in an electronic retreval system or otherwise without the prior written permission of the publisher. The American Society of Mechanical Engineers Two Park Avenue New York NY 10016-5990 THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Copyright @ 2023 by All rights reserved Printed in U.S.A.
CONTENTS Foreword Committee Roster . IA Correspondence With the B16 Committee . 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 .... . GR-1 Scope . . 1 GR-2 Quality Systems GR-3 References 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 2 RJ-6 Surface Finish 2 RJ-7 Identification Number . - 2 Part SW Spiral-Wound Gaskets . 14 SW-1 Size and Class 14 SW-2 Dimensions and Tolerances 14 SW-3 Materials 15 SW-4 Marking - 15 Part GM Grooved Metal Gaskets With Covering Layers 34 GM-1 Size and Class 34 GM-2 Dimensions and Tolerances 34 GM-3 Materials 34 GM-4 Marking 34 Mandatory Appendix I References Nonmandatory Appendix A Quality System Program 45 SW-2.1-1 Spiral-Wound Gasket . 16
GM-2.1-1 Grooved Metal Gasket With Covering Layers 36 GM-4.1-1 Illustration of Example Markings for Grooved Metal Gaskets With Covering Layers 43 Tables RJ-3.2-1 Maximum Hardness for Ring Gaskets . . 2 RJ-4-1 Ring Gasket Markings . 2 RJ-5-1 Type R Ring Gasket Dimensions and Tolerances . 3 RJ-5-2 Pipe Sizes for Type R Ring Gaskets Suitable for Referenced Standards . .... 6 RJ-5-3 Type RX Ring Gasket Dimensions and Tolerances . . * * * * 6 RJ-5-4 Pipe Sizes for Type RX Ring Gaskets Suitable for Referenced Standards . . 11 RJ-5-5 Type BX Ring Gasket Dimensions and Tolerances . . * * 12 RJ-5-6 Pipe Sizes for Type BX Ring Gaskets Suitable for Referenced Standards 13 SW-2.1-1 Dimensions for Spiral-Wound Gaskets Used With ASME B16.5 Flanges 17 SW-2.1-2 Dimensions for Spiral-Wound Gaskets Used With ASME B16.47 Series A Flanges . 20 SW-2.1-3 Dimensions 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 .... . 25 SW-2.1-6 Inside Diameters of Inner Rings forSpiral-Wound Gaskets Used Between ASME B16.47 Series B Flanges .... 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 B16.5 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 Abbreviations for Spiral-Wound Gasket Materials 31 SW-4.1-1 Example Markings for Spiral-Wound Gaskets . . * 32 GM-2.1-1 Dimensions forGrooved Metal Gaskets With Covering Layers Used With ASME B16.5 Flanges 37 GM-2.1-2 Dimensions for Grooved Metal Gaskets With Covering Layers Used With ASME B16.47 Series A Flanges ....... 88 GM-2.1-3 Dimensions for Grooved Metal Gaskets With Covering Layers Used With ASME B16.47 Series 40 GM-3.1-1 Color Coding and Abbreviations for Grooved Metal Gaskets With Covering Layers Materials 42 GM-4.1-1 Example Markings for Grooved Metal Gaskets With Covering Layers . . - 43 iv
ASME B16.20-2023 管道法兰用金属垫片(英文版).pdf
