ASMEB31.1-2020 (RevisionofASMEB31.1-2018) Power Piping ASMECodeforPressurePiping B31 ANINTERNATIONALPIPING CODEO The American Societyof MechanicalEngineers
ASMEB31.1-2020 (Revision of ASME B31.1-2018) Power Piping ASMECodeforPressure Piping B31 ANINTERNATIONALPIPINGCODE TheAmericanSocietyof Mechanical Engineers Two Park AvenueNewYork NY10016 USA
Date of Issuance: September 30 2020 The next edition of this Code is scheduled for publication in 2022.This Code willbee effective 6 months after the Date of Issuance. ASME issues written replies to inquiries concerning interpretations of technical aspects of this Code. Interpretations are publishedntheCommiteewebpageandunergo.ame.org/nterpsDatabasePeriodicallycertainactionsf the ASME B31 Committee may be published as Cases. Cases are published on the ASME website under the B31 Committee Page at go.asme.org/B31mittee as they are issued. Errata to codes and standards may be posted on the ASME website under the Committee Pages of the associated codes and standards to providecorrections to incorrectlypublisheditems or to correct typographical orgrammatical erorsin codes and standards. Such errata shall be used on the date posted. TheB31CommitteePage canefound atgo.asme.org/31mitteeTheassociatedB31Commite Pagesforeach code and standard can be accessed from this main page. There is an option available to automatically receive an email notifiction when erata are posted to a particular code or standard. This option can be found on the appropriate Committee Page after selecting “Errata” in the “Publication Information section. ASME is the registered trademark of The American Society of Mechanical Engineers. This international code or standard was developed under procedures accredited as meeting the criteria for American National Standards fromentednterstavehdprtitytoppathprsdcerstadarddevall anditisanAmericanNationalStandard.TheStandardCommitteethat approvethecode orstandardwasbalancedtoasurethatindividuals reviewnnt thtrvidesnprtunitfrditnlulcnutfrmndustrcdemagulatorenciendthpulit large. ASME does not *approve ”*rate or “endorse” any item construction proprietary device or activity. dcuntnteakurniingtadiftfclee ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this risk of infringement of suchrights is entirely their own responsibility. assumeanysuchliabilityUsersfcoderstandardareexpresslyadvised that determinationof thevaldity ofanysuchpatent rights anth endorsement of this code or standard. Participation by federal agency representative(s) or person(s) affliated with industry is not to be interpreted as government or industry and policies which preclues the issuance of interpretations by individuals. ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures No part of this document may be reproduced in any form without the prior written permission of the publisher. in an electronic retreval system or otherwise The American Society of Mechanical Engineers Two Park Avenue New York NY 10016-5990 THE AMERICAN SOCIETY OF MECHANICALENGINEERS Copyright 2020 by All rights reserved Printed in U.S.A.
CONTENTS Foreword Committee Roster .. X Introduction x Summary of Changes ... xvi Chapter 1 Scope and Definitions 100 Chapter II Design. 1 16 Part 1 Conditions and Criteria 16 101 Design Conditions ... 16 102 Design Criteria 18 Part 2 Pressure Design of Piping Components 103 Criteria for Pressure Design of Piping Components 23 104 Pressure Design of Components 25 Part 3 Selection and Limitations of Piping Components 38 105 38 106 Fittings Bends and Intersections 39 107 40 108 Pipe Flanges Blanks Flange Facings Gaskets and Bolting 41 Part 4 Selection and Limitations of Piping Joints 42 110 Piping Joints . . 42 111 Welded Joints 42 112 Flanged Joints . 42 113 Expanded or Rolled Joints .. 42 114 Threaded Joints .. 42 115 Flared Flareless and Compresson Joints and Unions 46 116 Bell End Joints ... 47 117 Brazed and Soldered Joints . 47 118 Sleeve Coupled and Other Proprietary Joints 47 Part 5 Expansion Flexibility and Pipe-Supporting Elements 47 119 Expansion and Flexibility 47 120 Loads on Pipe-Supporting Elements 50 121 Design of Pipe-Supporting Elements 51 Part 6 Systems.. 54 122 Design Requirements Pertaining to Specific Piping Systems 54 Chapter III Materials 69 123 General Requirements 69 124 Limitations on Materials . 70 125 Creep Strength Enhanced Ferritic Materials 72
Chapter IV Reference Specifications Codes and Standards .... . 74 126 Specifications and Standards for Standard and Nonstandard Piping Components ...... 74 Chapter V Fabrication Assembly and Erection ........ 83 127 Welding........ 83 128 Brazing and Soldering .... 91 129 94 130 Requirements for Fabricating and Attaching Pipe Supports . .* . 98 131 98 132 Postweld Heat Treatment ... 100 133 Stamping ... 105 135 Assembly 105 Chapter VI Inspection Examination and Testing .... . 107 136 Inspection and Examination ...- 107 137 Pressure Tests 112 Chapter VII Operation and Maintenance 116 138 General 116 139 Operation and Maintenance Procedures .... 116 140 Condition Assessment of CPS 116 141 CPS Records 117 142 Piping and Pipe-Support Maintenance Program and Personnel Requirements . 118 143 Repair of CPS 118 144 CPS Wallkdowns 118 145 Material Degradation Mechanisms . 118 146 Dynamic Loading . . 118 149 Rerating Piping Systems 119 Mandatory Appendices A Allowable Stress Tables 120 B Thermal Expansion Data 233 C Moduli of Elasticity 243 D Flexibility and Stress Intensification Factors . 251 F Referenced Standards 259 G Nomenclature . 263 H Preparation of Technical Inquiries 269 N Rules for Nonmetallic Piping and Piping Lined With Nonmetals . 270 0 Use of Alternative Ultrasonic Acceptance Criteria 301 P Metallic Bellows Expansion Joints . . 304 Nonmandatory Appendices Rules for the Design of Safety Valve Installations . BOE V Corrosion Control for ASME B31.1 Power Piping Systems . 329 V Remended Practice for Operation Maintenance and Modification of Power Piping Systems...... 333 VI Procedures for the Design of Restrained Underground Piping - 347 VIII Guidelines for Determining If Low-Temperature Service Requirements Apply ..... BSE AI
ASME B31.1 2020 动力管道(英文版).pdf
