1、AN AMERICAN NATIONAL STANDARD ASME B16.40-2013(Revision of ASME B16.40-2008)Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution SystemsASME B16.40-2013(Revision of ASME B16.40-2008)Manually OperatedThermoplastic GasShutoffs and Valvesin Gas DistributionSystemsAN AMERICAN NATI
2、ONAL STANDARDTwo Park Avenue New York, NY 10016 USADate of Issuance: September 12, 2013The next edition of this Standard is scheduled for publication in 2018.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically certain actions of the
3、ASME B16 Committee may be published as Cases. Casesand interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org/ as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages toprovide corrections to incorre
4、ctly published items, or to correct typographical or grammatical errorsin codes and standards. Such errata shall be used on the date posted.The Committee Pages can be found at http:/cstools.asme.org/. There is an option available toautomatically receive an e-mail notification when errata are posted
5、to a particular code or standard.This option can be found on the appropriate Committee Page after selecting “Errata” in the “PublicationInformation” section.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredite
6、d as meeting the criteria for American NationalStandards. The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review
7、 and comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-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 validit
8、y of any patent rights asserted in connection with anyitems mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expresslyadvised th
9、at determination of the validity of any such patent rights, and the risk of infringement of such rights, isentirely their own responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted asgovernment or industry endorsement of this c
10、ode or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME 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 re
11、trieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue, New York, NY 10016-5990Copyright 2013 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster .
12、 vCorrespondence With the B16 Committee vi1 Scope . 12 Construction. 23 Configuration 24 Pressure Rating 25 Marking . 26 Production and Qualification Testing 2Tables1 Duration of Test 32 Maximum Operating Torque Values . 43 Sustained Test Pressures and Minimum Durations . 44 Flow and Head Loss Coeff
13、icients 6Mandatory AppendicesI Valve Design Pressure 7II References 8Nonmandatory AppendixA Quality System Program 9iiiFOREWORDThe B16 Standards Committee was organized in the spring of 1920 and held its organizationalmeeting on November 21 of that year. The group operated as a Sectional Committee (
14、laterredesignated as a Standards Committee) under the authorization of the American EngineeringStandards Committee subsequently named American Standards Association, United States ofAmerica Standards Institute, and now American National Standards Institute (ANSI). Sponsorsfor the group were the Amer
15、ican Society of Mechanical Engineers, Manufacturers StandardizationSociety of the Valve and Fittings Industry, and the Heating and Piping Contractors NationalAssociation (later the Mechanical Contractors Association of America).The American Gas Association determined that standardization of gas valv
16、es used in distribu-tion systems was desirable and needed. The A.G.A. Task Committee on Standards for Valvesand Shutoffs was formed, and development work commenced in 1958. In 1968, it was determinedthat a more acceptable document would result if approval were gained from ANSI, and to facilitatesuch
17、 action, the A.G.A. Committee became Subcommittee No. 13 of the B16 activity. This B16group was later renamed Subcommittee L, which is its current designation.The first standard developed by Subcommittee L was B16.33. The B16.38 standard was subse-quently developed to cover larger sizes of gas valve
18、s and shutoffs. Since about 1965, the increaseduse of plastic piping in gas distribution systems brought with it the need for valves and shutoffsof compatible material. To fill this need, the present standard was developed and initially appearedas ANSI B16.40-1977. Subcommittee L began review of thi
19、s document in 1982.In ANSI/ASME B16.40-1985, editorial changes were made throughout the text to bring theformat in line with the rest of the B16 series of standards and to clarify the intent of this Standard.Revisions included the addition of rules for allowable pressure at temperatures above 74F fo
20、rvalves of certain materials, updating of reference standards, and editorial changes to text andtables.In 2001, after several years and iterations, B16 Subcommittee L produced a fully reviseddocument. Among the many revisions were a new Definitions section, a new Impact Resistancesection, and a nonm
21、andatory Quality Systems Program Annex.Following approval by the B16 Standards Committee and the ASME Supervisory Board, thelast version of this Standard was approved as an American National Standard by ANSI onMarch 18, 2008.The 2013 Edition of B16.40 has updated certain material specifications and
22、includes othereditorial revisions to the text.This edition of the Standard was approved as an American National Standard by ANSI onAugust 6, 2013.All requests for interpretations or suggestions for revisions should be sent to the Secretary,B16 Committee, The American Society of Mechanical Engineers,
23、 Two Park Avenue, New York,NY 10016-5990.ivASME B16 COMMITTEEStandardization of Valves, Flanges,Fittings, and Gaskets(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSW. B. Bedesem, ChairG. A. Jolly, Vice ChairC. E. OBrien, SecretaryS
24、TANDARDS COMMITTEE PERSONNELA. Appleton, Alloy Stainless Products Co, Inc.R. W. Barnes, ANRIC Enterprises, Inc.W. B. Bedesem, ConsultantR. M. Bojarczuk, ExxonMobil Research however, theyshould not contain proprietary names or information.Requests that are not in this format will be rewritten in this
25、 format by the Committee priorto being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved by aninte
26、rpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The B16 Standards Committee regularly holds meetings, whichare open to the public. Pers
27、ons wishing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.viASME B16.40-2013MANUALLY OPERATED THERMOPLASTIC GAS SHUTOFFSAND VALVES IN GAS DISTRIBUTION SYSTEMS1 SCOPE1.1 General(a) This Standard covers manually operated thermo-plastic valves in nominal valve sizes12
28、through 12. Thesevalves are intended for use below ground in thermoplas-tic fuel gas distribution mains and service lines. Themaximum operating pressure (MOP) at which such dis-tribution piping systems may be operated is in accor-dance with the Code of Federal Regulations (CFR)Title 49, Part 192, Tr
29、ansportation of Natural and OtherGas by Pipeline; Minimum Safety Standards, for temper-ature ranges of 20F to 140F (29C to 60C).(b) This Standard sets qualification requirements foreach basic valve design as a necessary condition fordemonstrating conformance to this Standard.(c) This Standard sets r
30、equirements for newly manu-factured valves for use in below-ground piping systemsfor fuel gas includes synthetic natural gas (SNG) andliquefied petroleum (LP) gases (distributed as a vapor,with or without the admixture of air) or mixtures thereof.1.2 ReferencesStandards and specifications referenced
31、 under thisStandard are shown in Mandatory Appendix II.1.3 ConversionFor the purpose of determining conformance with thisStandard, the convention for fixing significant digits,where limits maximum or minimum values are speci-fied, shall be “rounded off” as defined inASTM Practice E29. This requires
32、that an observed orcalculated value shall be rounded off to the nearest unitin the last right-hand digit used for expressing the limit.Decimal values and tolerances do not imply a particularmethod of measurement.1.4 Relevant UnitsThe values stated in either inch or metric units are tobe regarded sep
33、arately as standard. Within the text, thevalues stated in each system are not exact equivalents;therefore, each system must be used independently ofthe other. Combining values from the two systems mayresult in nonconformance with the Standard.11.5 Definitionsbasic valve design: for a given valve des
34、ign, each variationin material, size, or configuration of molded pressure-containing parts shall constitute a different basic valvedesign, except where minor design variations are pro-duced by differences in machining of the same moldedpiece(s) to produce different end sizes or dimensionalratios (DR
35、s).DR: the dimensional ratio defined as the pipe outsidediameter (O.D.) divided by the pipe wall thickness, t.DR p O.D./t.DRv: the valve DR equivalent is the designated valveDR based on the lowest DR of the ASTM D2513 pipeends used in long-term hydrostatic testing under thisStandard.fasteners: nuts,
36、 bolts, washers, clip rings, and otherdevices used in the assembly of valves.lubricated valves: valves that require pressure lubricationto effect a leak-tight seal (by the insertion through fit-tings of lubricant to the sealing surfaces of the valve).NVS: nominal valve size.pressure: unless otherwis
37、e stated, pressure is gagepressure.production pressure tests: pressure tests that include seatand closure-member and shell tests.seat and closure-member test: an internal pressure test ofclosure-sealing elements (seats, seals, and closure mem-bers, such as gate, disc, ball, or plug).shell test: an i
38、nternal pressure test of the pressure-containing envelope.valve design pressure: the pressure calculated by themethod described in Mandatory Appendix I using thevalve shell materials Hydrostatic Design Basis (HDB)at 73F (23C).1.6 Quality SystemsNonmandatory requirements relating to the productmanufa
39、cturers Quality System Program are describedin Nonmandatory Appendix A.ASME B16.40-20132 CONSTRUCTION2.1 General(a) The workmanship used in the manufacture andassembly of each valve shall provide gas tightness, safetyand reliability of performance, and freedom from injuri-ous imperfections and defec
40、ts.(b) Design details not addressed in this Standard arethe responsibility of the manufacturer.2.2 Materials2.2.1 Valve Shell. The pressure-containing valveshell shall be made from either polyethylene (PE) orpolyamide 11 (PA-11) materials specified in and quali-fied to the requirements for pipe and
41、fittings as listedin ASTM D2513.2.2.2 Parts Other Than the Valve Shell. Parts otherthan the valve shell, which contribute to pressure con-tainment or retaining differential pressure across theclosure element, shall be resistant to the gases in para.1.1(c). Such parts shall be designed to withstand n
42、ormalvalve-operating loads and, in addition, shall providelong-term pressure-containment integrity consistentwith the valve shell. The sustained pressure tests ofpara. 6.3.3 shall qualify the design and material selectedfor these parts, which include, but are not limited to,the closure member, stems
43、 or shafts (if they are designedto retain pressure), and fasteners retaining shell sections.2.2.3 Lubricants and Sealants. Lubricants and seal-ants shall be resistant to the action of gases referred toin para. 1.1(c). Lubricated valves, as defined in para. 1.5,are not within the scope of this Standa
44、rd.2.2.4 Responsibility. When service conditions, suchas gases having high hydrogen content or compoundslikely to form condensate, dictate special materials con-siderations, it is the users responsibility to specify thisinformation to the manufacturer.3 CONFIGURATION3.1 Operating Indication(a) Valve
45、s designed for one-quarter turn operationshall be designed to visually show the open and closedposition of the valve. A rectangular stem head withan arrow thereon or a separate position indicator shallindicate the closed position of the valve port when thelongitudinal axis of the stem head or indica
46、tor is perpen-dicular to the axis of the connecting pipe. If a separateindicator is used, it shall be designed such that it cannotbe assembled to incorrectly indicate the position of thevalve.(b) Valves designed for more than one-quarter turnoperation shall close by clockwise stem rotation, unlessot
47、herwise specified by the user. The direction for closingthe valve shall be indicated.23.2 Valve End DesignValve ends shall be designed to one or more of thefollowing, unless otherwise specified by the user:(a) PE or PA-11 valve stub-ends that conform to theapplicable dimensions of ASTM D3261, F1733,
48、 or D2513(b) polyethylene socket ends that conform to theapplicable dimensions listed in Tables 1 and 2 ofASTM D2683(c) integral mechanical joints that meet the require-ments of the applicable paragraphs under CFR, Title 49,Part 192, Subpart F, Joining of Material Other Than byWelding4 PRESSURE RATI
49、NG4.1 Maximum Pressure RatingThe maximum pressure rating of each valve is thevalve design pressure as defined in para. 1.5 for servicefrom 20F to 140F (29C to 60C).4.2 Design PressureThe design pressure of the valve shall be limited tothe maximum service pressure permitted for plastic pipeas specified in 49 CFR, Part 192.123.5 MARKINGEach valve shall be clearly marked to show thefollowing:(a) the manufacturers name or trademark.(b) the designation B16.40.(c) the NVS.(d) the pressure shell material designation code asspecified in ASTM D 2513.(e) DRv.(f) each mol
