ASME B31.9-2008 建筑管道规范.pdf

AN AMERICAN NATIO NAL STANDAR D Building Services Piping ASME B31.9-2008 Revision of ASME B31.9-2004 ASME Code for Pressure Piping, B31 Copyright ASME International Provided by IHS under license with ASME LicenseeFMC Technologies /5914950002 Not for Resale, 05/13/2009 010649 MDTNo reproduction or networking permitted without license from IHS --,,,,,,,,,,,,,,,--,,,,,,,--- ASME B31.9-2008 Revision of ASME B31.9-2004 Building Services Piping ASME Code for Pressure Piping, B31 AN AMERICAN NATIONAL STANDARD Copyright ASME International Provided by IHS under license with ASME LicenseeFMC Technologies /5914950002 Not for Resale, 05/13/2009 010649 MDTNo reproduction or networking permitted without license from IHS --,,,,,,,,,,,,,,,--,,,,,,,--- Date of Issuance July 14, 2008 The next edition of this Code is scheduled for publication in 2011. This Code will become effective 6 months after the Date of Issuance. There will be no addenda issued to this edition. ASME issues written replies to inquiries concerning interpretations of technical aspects of this Code. The interpretations are included with this edition. 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 for American National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available forpublic review andcomment thatprovides an opportunityfor additional public from industry,academia, regulatory agencies, and the public-at-large. ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity. 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No part of this document may be reproduced in any , in an electronic retri system or otherwise, without the prior written permission of the publisher. The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990 Copyright 2008 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All rights reserved Printed in U.S.A. Copyright ASME International Provided by IHS under license with ASME LicenseeFMC Technologies /5914950002 Not for Resale, 05/13/2009 010649 MDTNo reproduction or networking permitted without license from IHS --,,,,,,,,,,,,,,,--,,,,,,,--- CONTENTS Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v Committee Roster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii Summary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .x Chapter IScope and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 900General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Chapter IIDesign. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Part 1Conditions and Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 901Design Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 902Design Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Part 2Pressure Design of Piping Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 903Criteria for Pressure Design of Piping Components . . . . . . . . . . . . . . . . . . . . . . . .11 904Pressure Design of Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Part 3Selection and Limitation of Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 905Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 906Fittings, Bends, and Intersections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 907Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 908Flanges, Blanks, Gaskets, and Bolting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Part 4Selection and Limitation of Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 910Piping Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 911Welded Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 912Flanged Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 913Mechanical and Proprietary Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 914Threaded Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 915Flared, Flareless, and Compression Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 916Bell and Spigot Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 917Brazed and Soldered Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Part 5Expansion, Flexibility, and Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 919Expansion and Flexibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 920Loads on Pipe-Supporting Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 921Design of Pipe-Supporting Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Part 6Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 922Design Requirements Pertaining to Specific Piping Systems . . . . . . . . . . . . . . . .24 Chapter IIIMaterials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 923Materials General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Chapter IVComponent Requirements and Standard Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 926Dimensions and Ratings of Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 Chapter VFabrication, Assembly, and Erection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 927Welded Fabrication of Metals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 928Brazing and Soldering of Metals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 929Bending . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 930ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 931Heat Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 934Fabrication of Nonmetals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 935Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 iii Copyright ASME International Provided by IHS under license with ASME LicenseeFMC Technologies /5914950002 Not for Resale, 05/13/2009 010649 MDTNo reproduction or networking permitted without license from IHS --,,,,,,,,,,,,,,,--,,,,,,,--- Chapter VIInspection, Examination, and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 936Inspection and Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 937Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 Figures 900.1.2Code Jurisdictional Limits for Piping Drum Type Boilers . . . . . . . . . . . . . . . .2 904.2.2Nomenclature for Miter Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 921.1.3-1Support Spans for Standard Wall Steel Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 921.1.3-2Support Spans for Copper and Thermoplastic Pipe . . . . . . . . . . . . . . . . . . . . . . . . .22 927.4.3-1Fillet Weld Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 927.4.3-2Minimum Weld Size, Setback, and Depth of Insertion for Slip-On and Socket Weld Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36 927.4.3-3Minimum Welding Dimensions for Socket-Welding Components Other Than Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36 927.4.5-1Acceptable Welds for Flat Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 927.4.5-2Unacceptable Welds for Flat Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 927.4.6-1Typical Weld Branch Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 927.4.6-2Typical Weld Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 Tables 902.4.3Joint Factors, E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 904.2.1Pipe Thickness for Bends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 917.3Rated Internal Working Pressures of Joints Made With Copper Water Tube and Solder Joint Fittings, psig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 919.3.1Moduli of Elasticity and Thermal Expansion Coefficients . . . . . . . . . . . . . . . . . . .18 921.2.2Capacities of Threaded ASTM A 36 Steel Rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 926.1Component Standards and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 926.2Standard Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 Mandatory Appendices IStress Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 IIAllowable Pressures for Nonmetallic, Nonplastic Pressure Piping . . . . . . . . . . .57 IIIReference Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58 IVPreparation of Technical Inquiries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61 Nonmandatory Appendices ANonmandatory Quality System Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62 BSeismic Design and Retrofit of Piping Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67 iv Copyright ASME International Provided by IHS under license with ASME LicenseeFMC Technologies /5914950002 Not for Resale, 05/13/2009 010649 MDTNo reproduction or networking permitted without license from IHS --,,,,,,,,,,,,,,,--,,,,,,,--- FOREWORD The need for a national code for pressure piping became increasingly evident from 1915 to 1925. The American Standards Association initiated the B31 Project in March 1926 to meet that need. The American Society of Mechanical Engineers proposed the work and has served as sponsor since its inception. The first edition was published in 1935 as the American Tentative Standard Code for Pressure Piping. To keep the Code abreast of developments in design, welding, and of new standards and specifications, as well as of developments in service conditions, new or supplementary editions were issued as follows B31.1-1942American Standard Code for Pressure Piping B31.1-1942American Standard Code for Pressure Piping B31.1a-1944Supplement 1 B31.1b-1947Supplement 2 B31.1-1951American Standard Code for Pressure Piping B31.1a-1953Supplement 1 to B31.1-1951 B31.1-1955American Standard Code for Pressure Piping In 1955, a decision was made to develop and publish separate Code Sections for various industries. The current Sections are B31.1Power Piping B31.3Process Piping B31.4Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids B31.5Refrigeration Piping B31.8Gas Transmission and Distribution Piping Systems B31.9Building Services Piping B31.11Slurry Tra