1、AN AMERICAN NATIONAL STANDARD ASME B16.44-2012Revision of ASME B16.44-2002 (R2007)Manually Operated Metallic Gas Valves for Use in Aboveground Piping Systems Up to 5 psiASME B16.44-2012Revision of ASME B16.44-2002 (R2007)Manually OperatedMetallic Gas Valves forUse in AbovegroundPiping SystemsUp to 5
2、 psiAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016 USADate of Issuance: November 19, 2012The next edition of this Standard is scheduled for publication in 2017.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically ce
3、rtain actions of the 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 c
4、orrections to incorrectly 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 wh
5、en errata are posted 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
6、 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 to participate. The proposed code or standard was madeavaila
7、ble 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, proprietary device, or activity.ASME does not take any position with r
8、espect 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, nor assumes any such liability. Users of a code or standard ar
9、e 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 industry is not to be interpreted asgovernment or industry
10、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 individuals.No part of this document may be reproduced in any for
11、m,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 2012 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForewo
12、rd ivCommittee Roster vCorrespondence With the B16 Committee . vi1 Scope . 12 General Construction and Assembly . 13 Materials 24 Marking . 45 Design Qualifications 46 Manufacturing and Production Tests 7Figure1 Test Device . 6Tables1 Flare Fitting Dimensions 22 Materials for Valve Bodies, Plugs, Bo
13、nnets, Unions, and Other ExternalParts Excluding Handles 33 Operating Torque Values 44 Minimum Flow Capacity 55 Installation Torque 56 Impact Load 57 Static Load for Bending Test . 6Mandatory AppendixI References 9Nonmandatory AppendixA Quality System Program 11iiiFOREWORDThe B16 Standards Committee
14、 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 Committee subsequently named American Standard
15、s Association (ASA), then theUnited States of America Standards Institute, and now, the American National Standards Institute(ANSI). Sponsors for the group were The American Society of Mechanical Engineers (ASME),Manufacturers Standardization Society of the Valve and Fitting Industry, and the Heatin
16、g andPiping Contractors National Association (later the Mechanical Contractors Association ofAmerica).The American Gas Association (AGA) determined that standardization of gas valves used indistribution systems was desirable and needed. The AGA Task Committee on Standards forValves and Shut-Offs was
17、 formed and development work commenced in 1958. In 1968, it wasdetermined that a more acceptable document would result if approval were gained from ANSIand to facilitate such action, the AGA Committee became B16 Subcommittee No. 13, later renamedSubcommittee L, which is its current designation. In 1
18、982, the B16 Committee was reorganizedas an ASME committee operating under procedures accredited by ANSI. The first standarddeveloped by the Subcommittee was ANSI B16.33.As a follow-up, the B16.38 standard was subsequently developed to cover larger sizes of gasvalves and shut-offs. Starting in about
19、 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 lack of standards for gas valves for use in gas piping systems do
20、wnstream 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 so that users and manufacturers have a common basis valvespecifica
21、tion, 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 other revisionswere incorporated to bring the standard up to date w
22、ith the current practices.In 2012, a new edition was released to introduce a new Mandatory Appendix for the referencedstandards. This Mandatory Appendix has also been updated to keep the references relevant andup to date.Following its approval by the B16 Standards Committee, this Standard was approv
23、ed as anAmerican National Standard by ANSI on August 21, 2012.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.
24、 E. OBrien, SecretarySTANDARDS COMMITTEE PERSONNELA. Appleton, Alloy Stainless Products Co., Inc.R. W. Barnes, ANRIC Enterprises, Inc.W. B. Bedesem, ConsultantR. M. Bojarczuk, ExxonMobil Research and Engineering Co.D. F. Buccicone, Elkhart Products Corp.A. M. Cheta, Shell Exploration however, they s
25、houldnot contain proprietary names or information.Requests that are not in this format will be rewritten in this 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
26、 if additionalinformation that might affect an interpretation is available. Further, persons aggrieved by aninterpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Atten
27、ding Committee Meetings. The B16 Standards Committee regularly holds meetings, whichare open to the public. Persons wishing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.viASME B16.44-2012MANUALLY OPERATED METALLIC GAS VALVES FOR USE INABOVEGROUND PIPING SYSTEMS UP
28、 TO 5 psi1 SCOPE1.1 GeneralThis Standard applies to new valve construction andcovers quarter turn manually 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
29、of the gas meter outlet and upstream of the inletconnection to a gas appliance. The valves covered bythis 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 ins
30、talled for serviceoutdoors and/or at temperatures below 32F (0C) and/or above 125F (52C).1.2 ApplicabilityThis 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
31、 in this Standard that arenecessary to meet the qualification and production test-ing requirements of this 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 LimitationsThi
32、s Standard does not apply to manually operatedgas valves that are an integral part of a gas appliance.Manually operated gas valves intended for use in aparticular appliance are covered in ANSI Z21.15/CGA 9.1.1.4 ConventionFor determining conformance with this Standard, theconvention for fixing signi
33、ficant digits where limits(maximum and minimum values) are specified shall beas defined in ASTM E29. This requires that an observedor calculated value 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 particularm
34、ethod of measurement.11.5 Quality SystemsRequirements relating to the product manufacturersquality system programs are described inNonmandatory Appendix A.1.6 Relevant UnitsThis Standard states values in both SI (Metric) andU.S. Customary units. These systems of units are to beregarded separately as
35、 standard. Within the text, theSI units are shown in parentheses. The values stated ineach system are not exact equivalents; therefore, it isrequired that each system of units be used indepen-dently of the other. Combining values from the twosystems constitutes nonconformance with the Standard.All p
36、ressures, unless otherwise specified, 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
37、the specifiedgas tightness, reliability 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 thre
38、ads, whenprovided, shall be in 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 Table 1.Other flare sizes shall be made per manufacturersstandards.2.4 Operating Head
39、The operating head of the valve shall be a lever, tee,flat, or square head type. Separately attached handles,if provided, shall be securely attached to the valve byASME B16.44-2012Table 1 Flare Fitting DimensionsBCDEThread sizeIncluding undercutANote (1)MinimumDimension A, Dimension B, Dimension C,
40、Dimension D, Dimension E,Tube O.D., in. (mm) in. (mm) in. (mm) in. (mm) in. (mm)in. (mm) Thread Size Note (2) Note (2) Note (2) Note (2) Note (2)38(9.5)5818 UNF 0.312 (7.9) 0.531 (13.5) 0.220 (5.6) 0.54 (13.7) 0.620 (15.7)12(12.7)3416 UNF 0.438 (11.1) 0.641 (16.3) 0.250 (6.3) 0.66 (16.8) 0.750 (19.0
41、)58(15.9)151616 UN 0.565 (14.3) 0.843 (21.4) 0.280 (7.1) 0.76 (19.3) 0.880 (22.3)NOTES:(1) Undercut is optional on3416 UNF thread and on151616 UN thread, and is required on5818 UNF thread.(2) Tolerance: 0.010 in. (0.25 mm)the use of threaded fasteners, retaining pins, or theirequivalent.2.5 Operatio
42、nThe valve shall require one-quarter turn from the fullclosed position to the full open position, or from thefull open position to the full closed position.2.6 Position IndicationThe valve shall be so constructed that the operatorcan visually determine that the valve is in the open orclosed position
43、. 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.2.7 Tamperproof FeaturesWhere valves are specified to be tamperproof, theyshall be designed and constructed to minimize the possi-bility of the removal of th
44、e 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 of lubricant(s) or for wear2that may occur and result in internal or external leakage.Such
45、 a valve shall be designed to prevent unseating ofthe rotor if accidentally jammed, for example, againsta supporting or adjoining structure (such as floors orwalls).3 MATERIALS3.1 Materials for Valve Bodies, Plugs, Bonnets,Unions, and Other External Parts ExcludingHandlesMaterials known to be accept
46、able for compliance withthis Standard are listed in Table 2. Other metallic materi-als may be used when the product incorporating themmeets the requirements of the Standard.3.2 Lubricants and SealantsLubricants and/or sealants shall be resistant to theaction of fuel gases such as natural, manufactur
47、ed, andLP gases. The valve manufacturer is responsible for theselection of lubricants and sealants, and for the determi-nation of their suitability for service conditions enumer-ated in section 1.ASME B16.44-2012Table 2 Materials for Valve Bodies, Plugs,Bonnets, Unions, and Other External PartsExclu
48、ding HandlesMaterial ASTM SpecificationsCast brass B584 Alloy UNS C83600, Alloy UNS C84400Cast bronze B62Cast iron A126 Class B, A48 Class 30Ductile iron A395, A536 Grade 60-40-18, or Grade 65412Forged brass B283 Alloy UNS C37700Malleable iron A47, A197Rod brass B16 Alloy UNS C36000Sintered brass B2
49、82 or MPIF Standard 35 Code CZP-3002 orCZP-2002Steel A108, A505, or A5693.3 Seating and Stem Seal Materials3.3.1 Elastomer Components Air Aging. Elastomerparts that are exposed to fuel gas shall be made frommaterials that, following 70-hr air aging in accordancewith ASTM D573 at 212F (100C), meet the elongation,tensile and hardness property requirements ofparas. 3.3.1.1 and 3.3.1.2.3.3.1.1 Tensile tests shall be conducted on sixdumbbells in accordance with ASTM D412. Three dumb-bells shall be air aged 70 hr in accordance withASTM D
