1、Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-AN AMERICAN NATIONAL STANDARDMANUALLY OPERATEDMETALLIC GAS VALVES FORUSE IN ABOVEGROUND PIPINGSYSTEMS UP TO 5 PSIASME B16.44-2002(Revision of ASME B16.
2、44-1995)Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-Date of Issuance: June 27, 2003The next edition of this Standard is scheduled for publication in 2007. There will be no addendaissued to this e
3、dition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Interpretations are published on the ASME Web site under the Committee Pages at http:/www.asme.org/codes/ as they are issued.ASME is the registered trademark of The American Society of Me
4、chanical 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 balanced to assure that individuals fromcompetent and concerned interests have had an opportunity
5、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 public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietar
6、y 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 anyone utilizing a standard against liability forinfringement of any applicable letters patent, no
7、r assume 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 own responsibility.Participation by federal agency representative(s) or person(s) affiliated with
8、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 establishedASME procedures and policies, which precludes the issuance of interpretations by indivi
9、duals.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 EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2003 byTHE AMERICAN SOCIETY OF MECHANICAL
10、ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-CONTENTSForeword ivCommittee Roster vCorrespondence With the B16 Committee . vi1 Scope . 12 General Constr
11、uction and Assembly . 13 Materials 34 Marking . 45 Design Qualifications 46 Manufacturing and Production Tests 77 References 8Figure1 Test Device 5Tables1 Flare Fitting Dimensions . 22 Materials for Valve Bodies, Plugs, Bonnets, Unions, and Other ExternalParts Excluding Handles. 33 Minimum Flow Capa
12、city. 44 Installation Torque. 45 Impact Load. 56 Static Load for Bending Test . 67 Operating Torque Values. 7Nonmandatory AnnexA Quality System Program . 10iiiCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license fro
13、m IHS-,-FOREWORDThe B16 Standards Committee was organized in the spring of 1920 and held its organizationalmeeting on November 21st of that year. The group operated as a sectional Committee (laterredesignated as a Standards Committee), under the authorization of the American EngineeringStandards Com
14、mittee (subsequently named American Standards Association, then the UnitedStates of America Standards Institute and now, American National Standards Institute). Sponsorsfor the group were the American Society of Mechanical Engineers, Manufacturers StandardizationSociety of the Valve and Fitting Indu
15、stry, and the Heating and Piping Contractors NationalAssociation (later the Mechanical Contractors Association of America).The American Gas Association determined that standardization of gas valves used in distribu-tion systems was desirable and needed. The A.G.A. Task Committee on Standards for Val
16、vesand Shut-Offs was formed and development work commenced in 1958. In 1968, it was determinedthat a more acceptable document would result if approval were gained for the American NationalStandards Institute and to facilitate such action, the A.G.A. Committee became B16 SubcommitteeNo. 13, later ren
17、amed Subcommittee L, which is its current designation. In 1982, the B16 Commit-tee, was reorganized as an ASME committee operating under procedures accredited by ANSI.The first standard developed by the Subcommittee was ANSI B16.33.As a follow-up, the B16.38 standard was subsequently developed to co
18、ver larger sizes of gasvalves and shut-offs. Starting in about 1965, there was a major increase in the use of plastic pipingin gas distribution systems, which made it desirable to have valves and shut-offs of a compatiblematerial. To fill this need, the B16.40 standard was developed.In 1985, the lac
19、k of standards for gas valves for use in gas piping systems, downstream fromthe point of delivery (meter outlet), and upstream of the inlet to gas utilization equipment, wasbrought to the attention of the subcommittee. To fill this need, this Standard was developed.This Standard has been developed s
20、o that user and manufacturers have a common basis valvespecification, one that can be readily used to qualify valve designs. Usage by certifying bodieswould make it possible for building codes to reference the standard.In 2002, the title was changed to clearly match the updated scope and several oth
21、er revisionswere incorporated to bring the standard up-to-date with the current practices.All request for interpretations or suggestions for revisions should be sent to the Secretary, B16Standards Committee, The American Society of Mechanical Engineers, Three Park Avenue, NewYork, NY 10016-5990.Foll
22、owing its approval by the B16 Standards Committee, this Standard was approved as anAmerican National Standard by ANSI on May 16, 2002.ivCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-ASME B16 COMMIT
23、TEEStandardization of Valves, Flanges, Fittings, Gaskets, andValve Actuators(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSH. R. Sonderegger, ChairM. L. Nayyar, Vice ChairP. A. Reddington, SecretaryCOMMITTEE PERSONNELR. W. Barnes, Anric EnterprisesW.
24、B. Bedesem, Exxonmobil Research however, they should not contain proprietary names orinformation.Requests that are not in this format will be rewritten in this format by the Committeeprior to being answered, which may inadvertently change the intent of the original request.ASME procedures provide fo
25、r reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved byan interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASMEdoes not “approve,” “certify,” “rate,” or “endorse” any item, cons
26、truction, proprietarydevice, or activity.Attending Committee Meetings. The B16 Standards Committee regularly holds meet-ings, which are open to the public. Persons wishing to attend any meeting should contactthe Secretary of the B16 Standards Committee.viCopyright ASME International Provided by IHS
27、under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-ASME B16.44-2002MANUALLY OPERATED METALLIC GAS VALVES FOR USE INABOVEGROUND PIPING SYSTEMS UP TO 5 PSI1 SCOPE1.1 GeneralThis Standard applies to new valve construction andcovers quarter turn manua
28、lly operated metallic valvesin sizes NPS 414and tubing sizes 114O.D. These valvesare intended for indoor installation as gas shutoff valveswhen installed in aboveground fuel gas piping down-stream of the gas meter outlet and upstream of the inletconnection to a gas appliance. The valves covered byth
29、is Standard are intended for service at temperaturesbetween 32F (0C) and 125F (52C) at pressure ratingsnot to exceed 5 psi (0.34 bar). When so designated by themanufacturer, these valves may be installed for serviceoutdoors and/or at temperatures below 32F (0C) and/or above 125F (52C).1.2 Applicabil
30、ityThis Standard sets requirements, including qualifica-tion requirements, for metallic gas valves for use in gaspiping systems. Details of design, materials, and testingin addition to those stated in this Standard that arenecessary to meet the qualification and production test-ing requirements of t
31、his Standard remain the responsi-bility of the manufacturer. A valve used under a codejurisdiction or governmental regulation is subject to anylimitation of such code regulations.1.3 LimitationsThis Standard does not apply to manually operatedgas valves that are an integral part of a gas appliance.M
32、anually operated gas valves intended for use in aparticular appliance are covered in the AmericanNational Standard/Canadian Gas Association Standardfor Manually Operated Gas Valves for Appliances,Appliance Connector Valves, and Hose End Valves,ANSI Z21.15/CGA 9.1.1.4 ConventionFor the purpose of det
33、ermining conformance withthis Standard, the convention for fixing significant digitswhere limits, maximum and minimum values, are speci-fied by “rounding off” as defined in ASTM Practice E29. This requires that an observed or calculated value1shall be rounded off to the nearest unit in the last righ
34、t-hand digit used for expressing the limit. Decimal valuesand tolerances do not imply a particular method of mea-surement.1.5 Quality SystemsRequirements relating to the product manufacturersQuality System Programs are described in Nonmanda-tory Annex A.1.6 UnitsThe values stated in either inch unit
35、s or metric unitsare to be regarded separately as standard. The valuesstated in each system are not exact equivalents; therefore,each system must be used independently of the other.Combining values from the two systems may result innon-conformance with the standard.All pressures, unless otherwise sp
36、ecified, are gaugepressures.2 GENERAL CONSTRUCTION AND ASSEMBLY2.1 GeneralEach valve at the time of manufacture shall be capableof meeting the requirements set forth in this Standard.The workmanship employed in the manufacture andassembly of each valve shall provide for the specifiedgas tightness, r
37、eliability of performance, freedom frominjurious imperfections, and defects as specified herein.2.2 End ConnectionsThe valve body shall be provided with wrench flatsat ends with tapered pipe threads.2.3 Pipe and Tubing Connections2.3.1 Taper Pipe Threads. Taper pipe threads, whenprovided, shall be i
38、n accordance with ASME B1.20.1.2.3.2 Flare Tubing Connection. Valves with an inletand/or outlet for38,12,or58O.D. tube shall be in accor-dance with the flare fitting dimensions shown in Table1. Other flare sizes shall be made per manufacturersstandards.2.4 Operating HeadThe operating head of the val
39、ve shall be a lever, tee,flat, or square head type. Separately attached handles,Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-ASME B16.44-2002 MANUALLY OPERATED METALLIC GAS VALVES FORUSE IN ABOVEG
40、ROUND PIPING SYSTEMS UP TO 5 PSIBCDEThread sizeIncluding undercutANote (1)Table 1 Flare Fitting DimensionsU.S. Customary UnitsMinimunTube O.D., Dimension, A, Dimension, B, Dimension, C, Dimension, D, Dimension, E,in. Thread Size in. Note (2) in. Note (2) in. Note (2) in. Note (2) in. Note (2)385818
41、UNF 0.312 0.531 0.220 0.54 0.620123416 UNF 0.438 0.641 0.250 0.66 0.75058151616 UN 0.565 0.843 0.280 0.76 0.880Metric UnitsMinimumDimension, A, Dimension, B, Dimension, C, Dimension, D, Dimension, E,Tube O.D. Thread Size mm Note (3) mm Note (3) mm Note (3) mm Note (3) mm Note (3)9.5 38in.5818 UNF 7.
42、9 13.5 5.6 13.7 15.712.7 12in.3416 UNF 11.1 16.3 6.3 16.8 19.015.9 58in.151616 UN 14.3 21.4 7.1 19.3 22.3NOTES:(1) Undercut is optional on3416 UNF thread and on151616 UN thread, undercut is required on5818 UNF thread.(2) Tolerance: 0.010 in.(3) Tolerance: 0.25 mm.if provided, shall be securely attac
43、hed to the valve bythe use of threaded fasteners, retaining pins, or theirequivalent.2.5 OperationThe valve shall require14turn from the full closedposition to the full open position, or from the full openposition to the full closed position.2.6 Position IndicationThe valve shall be so constructed t
44、hat the operatorcan visually determine that the valve is in the open orclosed position. When the valve is in the closed position,the operating lever or flow indicator shall be perpendic-ular to the longitudinal axis of the valve.22.7 Tamper-Proof FeaturesWhere valves are specified to be tamper-proof
45、, theyshall be designed and constructed to minimize the possi-bility of the removal of the core of the valve with otherthan specialized tools (i.e., tools other than commonwrenches, pliers, etc.).2.8 Automatic CompensationThe valve may be provided with automatic means tocompensate for displacement o
46、f lubricant(s) or for wearthat may occur and result in internal or external leakage.Such a valve shall be designed to prevent unseating ofthe rotor if accidentally jammed, for example, againsta supporting or adjoining structure (such as floors orwalls).Copyright ASME International Provided by IHS un
47、der license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-MANUALLY OPERATED METALLIC GAS VALVES FOR ASME B16.44-2002USE IN ABOVEGROUND PIPING SYSTEMS UP TO 5 PSITable 2 Materials for Valve Bodies, Plugs,Bonnets, Unions, and Other External PartsExcluding Ha
48、ndlesMaterial ASTM SpecificationsCast Brass B 584 Alloy UNS C83600, Alloy UNS C84400Cast Bronze B 62Cast Iron A 126 Class B, A 48 Class 30Ductile Iron A 395, A 536 Grade 60-40-18, or Grade 65412Forged Brass B 283 Alloy UNS C37700Malleable Iron A 47, A 197Rod Brass B 16 Alloy UNS C36000Sintered Brass
49、 B 282 or MPIF Standard 35 Code CZP 3002, orCZP 2002Steel A 108, A 505, or A 5693 MATERIALS3.1 Materials for Valve Bodies, Plugs, Bonnets,Unions, and Other External Parts ExcludingHandlesMaterials known to be acceptable for compliance withthis Standard are listed in Table 2. Other metallic materi-als may be used when the product incorporating themmeets the requirements of
