1、AN AMERICAN NATIONAL STANDARDBuilding Services PipingASME B31.9-2008(Revision of ASME B31.9-2004)ASME Code for Pressure Piping, B31Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B31.9-2008(R
2、evision of ASME B31.9-2004)BuildingServices PipingASME Code for Pressure Piping, B31AN AMERICAN NATIONAL STANDARDCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance: July 14, 2008The
3、next edition of this Code is scheduled for publication in 2011. This Code will become effective6 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 interpretation
4、s 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 NationalStandards. The Standards Committee that approved the code or standard was bal
5、anced 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 an opportunity for additional public input from industry, academia,regulatory agencies, and the p
6、ublic-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 asserted in connection with anyitems mentioned in this document, and does not undertake to insure any
7、one 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 validity of any such patent rights, and the risk of infringement of such rights, isentirely their ow
8、n 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 accepts responsibility for only those interpretations of this document issued in accordance with the es
9、tablishedASME 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,without the prior written permission of the publisher.The American Society of Mechanical Enginee
10、rsThree Park Avenue, New York, NY 10016-5990Copyright 2008 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-CONTENT
11、SForeword vCommittee Roster . viIntroduction . viiiSummary of Changes xChapter I Scope and Definitions 1900 General . 1Chapter II Design. 9Part 1 Conditions and Criteria . 9901 Design Conditions 9902 Design Criteria 9Part 2 Pressure Design of Piping Components 11903 Criteria for Pressure Design of P
12、iping Components 11904 Pressure Design of Components . 11Part 3 Selection and Limitation of Components 14905 Pipe 14906 Fittings, Bends, and Intersections 15907 Valves 15908 Flanges, Blanks, Gaskets, and Bolting 15Part 4 Selection and Limitation of Joints . 15910 Piping Joints 15911 Welded Joints .
13、15912 Flanged Joints . 16913 Mechanical and Proprietary Joints . 16914 Threaded Joints . 16915 Flared, Flareless, and Compression Joints 16916 Bell and Spigot Joints . 16917 Brazed and Soldered Joints 16Part 5 Expansion, Flexibility, and Support . 17919 Expansion and Flexibility 17920 Loads on Pipe-
14、Supporting Elements . 20921 Design of Pipe-Supporting Elements . 20Part 6 Systems 24922 Design Requirements Pertaining to Specific Piping Systems 24Chapter III Materials 26923 Materials General Requirements 26Chapter IV Component Requirements and Standard Practices 28926 Dimensions and Ratings of Co
15、mponents . 28Chapter V Fabrication, Assembly, and Erection . 34927 Welded Fabrication of Metals 34928 Brazing and Soldering of Metals . 39929 Bending 40930 Forming 40931 Heat Treatment . 40934 Fabrication of Nonmetals 40935 Assembly . 41iiiCopyright ASME International Provided by IHS under license w
16、ith ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Chapter VI Inspection, Examination, and Testing 43936 Inspection and Examination . 43937 Leak Testing 44Figures900.1.2 Code Jurisdictional Limits for Piping Drum Type Boilers 2904.2.2 Nomenclature for Miter J
17、oints . 12921.1.3-1 Support Spans for Standard Wall Steel Pipe 21921.1.3-2 Support Spans for Copper and Thermoplastic Pipe . 22927.4.3-1 Fillet Weld Size . 35927.4.3-2 Minimum Weld Size, Setback, and Depth of Insertion for Slip-On andSocket Weld Flanges 36927.4.3-3 Minimum Welding Dimensions for Soc
18、ket-Welding Components Other ThanFlanges . 36927.4.5-1 Acceptable Welds for Flat Heads 37927.4.5-2 Unacceptable Welds for Flat Heads 37927.4.6-1 Typical Weld Branch Connections . 38927.4.6-2 Typical Weld Details 38Tables902.4.3 Joint Factors, E 11904.2.1 Pipe Thickness for Bends 12917.3 Rated Intern
19、al Working Pressures of Joints Made With Copper WaterTube and Solder Joint Fittings, psig 17919.3.1 Moduli of Elasticity and Thermal Expansion Coefficients . 18921.2.2 Capacities of Threaded ASTM A 36 Steel Rods . 23926.1 Component Standards and Specifications 29926.2 Standard Practices 33Mandatory
20、AppendicesI Stress Tables 47II Allowable Pressures for Nonmetallic, Nonplastic Pressure Piping . 57III Reference Standards . 58IV Preparation of Technical Inquiries . 61Nonmandatory AppendicesA Nonmandatory Quality System Program . 62B Seismic Design and Retrofit of Piping Systems . 63Index 67ivCopy
21、right ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-FOREWORDThe need for a national code for pressure piping became increasingly evident from 1915 to1925. The American Standards Association initiated the
22、B31 Project in March 1926 to meet thatneed. The American Society of Mechanical Engineers proposed the work and has served assponsor since its inception.The first edition was published in 1935 as the American Tentative Standard Code for PressurePiping. To keep the Code abreast of developments in desi
23、gn, welding, and of new standards andspecifications, as well as of developments in service conditions, new or supplementary editionswere issued as follows:B31.1-1942 American Standard Code for Pressure PipingB31.1-1942 American Standard Code for Pressure PipingB31.1a-1944 Supplement 1B31.1b-1947 Sup
24、plement 2B31.1-1951 American Standard Code for Pressure PipingB31.1a-1953 Supplement 1 to B31.1-1951B31.1-1955 American Standard Code for Pressure PipingIn 1955, a decision was made to develop and publish separate Code Sections for variousindustries. The current Sections are:B31.1 Power PipingB31.3
25、Process PipingB31.4 Pipeline Transportation Systems for Liquid Hydrocarbons and Other LiquidsB31.5 Refrigeration PipingB31.8 Gas Transmission and Distribution Piping SystemsB31.9 Building Services PipingB31.11 Slurry Transportation Piping SystemsIn 1969, the American Standards Association, renamed t
26、he United States of America StandardsInstitute, became the American National Standards Institute (ANSI), and the B31 Sectional Com-mittee became the B31 Standards Committee. In 1978, The American Society of MechanicalEngineers was granted accreditation by ANSI to organize the B31 Committee as the AS
27、ME Codefor Pressure Piping, with Code Sections designated as ANSI/ASME B31.Need for a separate Building Services Section of the Code for Pressure Piping was recognizedfor several years. This new Code Section, ASME B31.9 Building Services Piping, first issued in1982, was developed to fill that need.T
28、he Code has intentionally been written on a conservative basis in order to avoid the necessityfor complex design, fabrication, and inspection criteria. For this reason, application of this Codeis expected to be simple and straightforward.Metric (SI) units have been added in parentheses after U.S. Cu
29、stomary units. This Code is basedon U.S. Customary Units.Following approval by the B31 Main Committee and the ASME Board on Pressure TechnologyCodes and Standards, and after public review, this Code Section was approved by the AmericanNational Standards Institute on April 1, 2008.vCopyright ASME Int
30、ernational Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B31 COMMITTEECode for Pressure Piping(The following is the roster of the Committee at the time of approval of this Code.)COMMITTEE OFFICERSM. L. Nayyar, ChairK.
31、C. Bodenhamer, Vice ChairN. Lobo, SecretaryCOMMITTEE PERSONNELR. J. T. Appleby, ExxonMobil Upstream Research Co.C. Becht IV, Becht Engineering Co.A. E. Beyer, Fluor Enterprises, Inc.K. C. Bodenhamer, Enterprise ProductsJ. S. Chin, TransCanada Pipeline U.S.D. L. Coym, Worley ParsonsJ. A. Drake, Spect
32、ra Energy TransmissionP. D. Flenner, Flenner Engineering ServicesD. M. Fox, Atmos EnergyJ. W. Frey, Stress Engineering Service, Inc.D. R. Frikken, Becht Engineering Co.R. A. Grichuk, Fluor Corp.R. W. Haupt, Pressure Piping EngineeringL. E. Hayden, Jr., Engineering ConsultantG. A. Jolly, Vogt Valves/
33、Flowserve Corp.N. Lobo, The American Society of Mechanical EngineersW. J. Mauro, American Electric PowerB31.9 BUILDING SERVICES PIPING SECTION COMMITTEEW. J. Sperko, Chair, Sperko Engineering Services, Inc.D. D. Christian, Vice Chair, Victaulic Co.S. Vasquez, Secretary, The American Society of Mecha
34、nicalEngineersM. H. Barnes, Sebesta, Blomberg it does not do away with the need for the designer or for competentengineering judgment.To the greatest possible extent, Code requirements for design are stated in terms of basic designprinciples and formulas. These are supplemented as necessary with spe
35、cific requirements toassure uniform application of principles and to guide selection and application of piping elements.The Code prohibits designs and practices known to be unsafe and contains warnings wherecaution, but not prohibition, is warranted.(a) This Code Section includes(1) references to ac
36、ceptable material specifications and component standards, includingdimensional requirements and pressuretemperature ratings(2) requirements for design of components and assemblies, including pipe supports(3) requirements and data for evaluation and limitation of stresses, reactions, and movementsass
37、ociated with pressure, temperature changes, and other forces(4) guidance and limitations on the selection and application of materials, components, andjoining methods(5) requirements for the fabrication, assembly, and erection of piping(6) requirements for examination, inspection, and testing of pip
38、ingIt is intended that this Edition of Code Section B31.9 and any subsequent addenda not beretroactive. Unless agreement is specifically made between contracting parties to use anotherissue, or the regulatory body having jurisdiction imposes the use of another issue, the latestedition and addenda is
39、sued at least 6 months prior to the original contract date for the first phaseof activity covering a piping system or systems shall be the governing document for all design,materials, fabrication, erection, examination, and testing for the piping until the completion ofthe work and initial operation
40、.Users of this Code are cautioned against making use of revisions without assurance that theyare acceptable to the proper authorities in the jurisdiction where the piping is to be installed.Code users will note that clauses in the Code are not necessarily numbered consecutively. Suchdiscontinuities
41、result from following a common outline, insofar as practicable, for all CodeSections. In this way, corresponding material is correspondingly numbered in most Code Sections,thus facilitating reference by those who have occasion to use more than one Section.The Code is under the direction of ASME Comm
42、ittee B31, Code for Pressure Piping, which isorganized and operates under ASME procedures that have been accredited by the AmericanNational Standards Institute. The Committee is a continuing one and keeps all Code Sectionscurrent with new developments in materials, construction, and industrial pract
43、ice. Addenda maybe issued periodically. New editions are published at intervals of 3 to 5 years.It is the owners responsibility to select the Code Section that most nearly applies to a proposedpiping installation. Different Code Sections may apply to different parts of an installation. Factorsto be
44、considered by the owner include: limitations of the Code Section, jurisdictional requirements,and the applicability of other codes and standards. All applicable requirements of the selectedCode Section shall be met, and the owner should impose additional requirements supplementingthose of the Code i
45、n order to assure safe piping for the proposed installation.viiiCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-(b) Rules for each Code Section have been developed considering the need for applica
46、tionspecific requirements for the pressure piping involved. Applications considered for each CodeSection include(1) B31.1,PowerPiping piping typically found in electric power generating stations, indus-trial and institutional plants, geothermal heating systems, and central and district heating andco
47、oling systems(2) B31.3, Process Piping piping typically found in petroleum refineries; chemical, textile,paper, semiconductor, and cryogenic plants; and related processing plants and terminals(3) B31.4, Liquid Transportation Piping piping for transporting predominantly liquid prod-ucts between plant
48、s and terminals and within terminals, and for pumping, regulating, andmetering stations(4) B31.5, Refrigeration Piping piping for refrigerants and secondary coolants(5) B31.8, Gas Transportation and DistributionPiping piping for transporting predominantlygas products between sources and terminals, i
49、ncluding compressor, regulating, and meteringstations; and gas gathering pipelines(6) B31.9, Building Services Piping piping for industrial, institutional, commercial, andpublic buildings, and multi-unit residences, which does not require the range of sizes, pressures,and temperatures covered in B31.1(7) B31.11, Slurry Transportation Piping piping for transporting aqueous
