ASME Bl6.44a-I997 Addenda: Asme Manually Operated Metallic Gas Valves For Use in House Piping Systems
ASME Bl6.44a-I997 Addenda: Asme Manually Operated Metallic Gas Valves For Use in House Piping Systems
ASME Bl6.44a-I997
                                               ADDENDA
                                                            to
                         ASME B16.44-1995
            MANUALLY OPERATED METALLIC GAS VALVES FOR
                   USE IN HOUSE PIPING SYSTEMS
                         This code or standard was developed under procedures accredited as meeting the criteria for
                      American National Standards. The Consensus Committee that approved the code or standard was
                      balanced to ensure that individuals from competent and concerned interests have had an opportu-
                      nity to participate. The proposed code or standard was made available for public review and corn-
                      ment which 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 aG
                      tivity.
                         ASME does not take any position with respect to the validity of any patent rights asserted in con-
                      nection with any items mentioned in this document, and does not undertake to insure anyone Utiliz-
                      ing a standard against liability for infringement of any applicable Leiters Patent, nor asume any
                      such liability. Users of a code or standard are expressly advised that the determination of the validity
                      of any such patent rights, and the risk of the infringement of such rights, is entirely their own respon-
                      sibility.
                         Participation by federal agency representative(s1or person(s) affiliated with industry is not to be
                      interpreted as government or industry endorsement of this code or standard.
                         ASME accepts responsibility for only those interpretations issued in accordance with governing
                      ASME procedures and policies which preclude the issuance of interpretations by individual volun-
                      teers.
                                                          Copyright O 1997 by
                                            THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
                                                           All Rights Reserved
                                                            Printed in U.S.A.
ASME 816.44a-1997
               Following approval by the ASME B16 Committee and ASME, and after public review, ASME
               B16.44a-1997 was approved by the American National Standards Institute on September 16, 1997.
               Addenda to the 1995 edition of ASME B16.44 are issued in the form of replacement pages. Revi-
               sions, additions, and deletions are incorporated directly into the affected pages. It is advisable,
               however, that this page, the Addenda title and copyright pages, and all replaced pages be retained
               for reference.
SUMMARY OF CHANGES
(The following is the roster of the Committeeat the time of approval of this Standard.)
                                                                 OFFICERS
                                                             W. N. McLean, Chair
                                                          R. A. Schmidt, Vice Chair
                                                         P. A. Reddington, Secretary
                   COMMITTEE PERSONNEL
                   W. L. Ballis, Consultant, London, Ohio
                   R. R. Brodin, Fisher Controls International, Inc., Marshalltown, Iowa
                   M. A. Clark, Nibco, Inc., Elkhart, Indiana
                   A. Cohen, Copper Development Association, New York, New York
                   C. E. Floren, Mueller Co., Decatur, Illinois
                   O. R. Frikken, Monsanto Co., St. Louis, Missouri
                   J. C. Inch, Mueller Refrigeration Products Co., Hartsville, Tennessee
                   G. A. Jolly, Vogt Valve Co., Louisville, Kentucky
                   W. G. Knecht, Consultant, Williamsport, Pennsylvania
                   R. Koester, The William Powell Co., Cincinnati, Ohio
                   W. N. McLean, Newco Valves, Palos Park, Illinois
                   M. L. Nayyar, Bechtel Corp., Gaithersburg, Maryland
                   P.A. Reddington,ASME, New York, New York
                   R. A. Schmidt, Ladish Co., Russellville, Arkansas
                   W. M. Stephan, Flexitallic, Inc., Mount Laurel, New Jersey
                   T. F. Stroud, Ductile Iron Pipe Research Association, Birmingham, Alabama
                   M. O. Wasicek, ABS Americas, Houston, Texas
                   R. E. White, Richard E. White and Associates, South Bend, Indiana
                   O. A. Williams, Southern Company Services, Birmingham, Alabama
                   L A. Willis, Dow Chemical Co., Freeport, Texas
                   W. R. Worley, Union Carbide Corp., South Charleston, West Virginia
vi
S T D - A S M E B L b - 4 4 A - E N G L 1777 = 0 7 5 9 b 7 0 0 5 8 b 8 3 5 837 W
CONTENTS
                    Foreword ...............................................................................
                                                                                                                 ...
                                                                                                                 111
                    Standards Committee Roster ...........................................................        v
                     1   Scope ...............................................................................    1
                     2   General Construction and Assembly..............................................          1
                     3   Materials ...........................................................................    2
                     4   Marking ............................................................................     2.1
                     5   Design Qualification Tests ........................................................      3
                     6   Manufacturing and Production Tests .............................................         6
                     Figure
                     1 The Test Drive .....................................................................       4
                     Tables
                     1 Materials for Valve Bodies. Plugs. Bonnets. Unions.
                           and Other External Parts Excluding Handles ..................................
                     2   Flow Capacity ......................................................................
                     3   Installation Torque.. ...............................................................
                     4   Static Load for Bending Test ......................................................
                     5   Maximum Opening and Closing Operating Torque
                           Values for Continued Operation Test ...........................................        6
                     Annexes
                     A Quality System Program ...........................................................         6.1
                     B References..........................................................................       7
vii
          TABLE 1 MATERIALS FOR VALVE BODIES, PLUGS, BONNETS, UNIONS, AND OTHER EXTERNAL
                                    PARTS EXCLUDING HANDLES
                        Material                                                 Specification
                         Cast Iron                                ASTM A126 Class B, ASTM A48 Class 30
                      Malleable Iron                           ASTM A40 Grade 3251O, ASTM A47, ASTM A197
                       Ductile Iron                         ASTM A395 ASTM A536 Grade 6040-1 8, or Grade 65412
                           Steel                                   ASTM A l 08, ASTM A505,or ASTM A569
                       Cast Bronze                                               ASTM B62
                        Cast Brass                          ASTM 8584 Alloy UNS C83600, ASTM Alloy UNS C844ûû
                      Forged Brass                                      ASTM 8283 Alloy UNS C37ï00
                        Rod Brass                                       ASTM B16 Alloy UNS C36000
                      Sintered Brass                      ASTM B282 or MPIF Standard 35 Code CZP 3002, or CZP 2002
                                                                        4.4 Tamper-Proof
                                                                          The designation T for tamper-proof construction
          4.2 Name
                                                                        where tamper-proof features are not easily identifi-
            The manufacturer’s name or trademark shall be               able without disassembling the valve, shall be shown
          shown.                                                        on the head, stem, or body.
2.1
           TABLE 4 STATIC LOAD FOR BENDINGTEST                             position. After each valve is tested, the load shall be
                   Valve Sue                   Static Load
                                                                           removed and each valve shall then be subjected to
                      (NPS)                        (Ib)                    the gas tightness tests specified in Section 5.2.
                       v2                           40
                       Y4                         42-%
                        1                           45
                      1-l/4                       47-%
                       1-%                        62-%
                        2                          85
                                                                           5.7 Continued Operation
            5.9.2 Method of Test. Two valves of each size               valve in the open position shall not leak in excess of
          and type shall be tested while connected to an air            two standard cubic feet per hour.
          suppiy'at a pressure of 2 psig.
                                                                        6 MANUFACTURINGAND PRODUCTIONTESTS
            One valve shall be tested in the closed position
          with the outlet open to atmosphere. The other valve              The manufacturer shall use a quality assurance
          shall be tested in the open position with the outlet          program to qualify raw materials, parts, assemblies,
          plugged. Both valves shall be placed in a chamber             and purchased components.
          and held at 785°F k 10°F for 30 minutes. The valves              The manufacturer shall test each valve covered by
          shall then be removed and allowed to cool to room             this Standard at 1.5 times the rated pressure for gas
          temperature. When tested with the inlet pressurized           tightness to atmosphere (external leakage) and gas
          at 2 psig, the valve in the closed position shall not         tightness through the valve (internal leakage), as de-
          leak in excess of six standard cubic feet per hour. The       fined in Section 5.2.
(This Annex is a nonmandatorypart of ACME 816.44-1995, and is provided for informationpurposes only.)
            The products manufactured in accordance with                           cation of the product manufacturer’s quality system
          this Standard shall be produced under a quality sys-                     program by an independent organization shall be the
          tem program following the principles of an appro-                        responsibility of the manufacturer. The detailed
          priate standard from the I S 0 9000 series.’ A deter-                    documentation demonstrating program compliance
          mination of the need for registration and/or certifi-                    shall be available to the purchaser at the manufac-
                                                                                   turer’s facility. A written summary description of the
                                                                                   program utilized by the product manufacturer shall
                                                                                   be available to the purchaser upon request. The
          ’The series is also available from the American National Stan-           product manufacturer is defined as the entity whose
          dards Institute (ANSI) and the American Sociev for Qualis-
          Control (ASQC) as American National Standards that are identi-           name or trademark appears on the product in ac-
          fied by a prefm “ Q replacing the prefix “ISO.” Each standard of         cordance with the marking or identification re-
          the series is listed under Annex B, References.                          quirements of this Standard.
6.1
                                                                 ANNEX B
                                                               REFERENCES
                      (This Annex is an integral part of ASME B16.44-1995,and is placed after the main text for convenience.)
                      This following list of standards and specifications are referenced in this Standard
                    showing the year of approval.
                    ASME B1.20.1-
                      1983(R1992)                      Pipe Threads, General Purpose (Inch)
ANSI Publication
ASTM Publications
                      Publications appearing above which have been approved as American National Stan-
                    dards may also be obtained from:
                   ANSI                        American National Standards Institute
                                               11 West 42nd Street
                                               New York, NY 10036
8.1
ASME B16.44-I995
                       This code or standard was developed under procedures accredited as meeting the criteria for
                    American National Standards. The Consensus 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 for public review and comment
                    which provides an opportunity for additional public input from industry, academia, regulatory agen-
                    cies, 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 validity of any patent rights asserted in
                    connection with any items mentioned in this document, and doas not undertake to insure anyone
                    utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume
                    any such liability. Users of a code or standard are expressly advised that determination of the validity
                    of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility.
                       Participation by federal agency representative(s)or person@)affiliated with industry is not to be
                    interpreted as government or industry endorsement of this code or standard.
                       ASME accepts responsibility for only those interpretations issued in accordance with governing
                    ASME procedures and policies which preclude the issuance of interpretations by individual volun-
                    teers.
                                                        Copyright O 1995 by
                                          THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
                                                         All Rights Resewed
                                                          Printed in U.S.A.
                        The B16 Standards Committee was organized in the Spring of 1920 and held its or-
                     ganizational meeting on November 21st of that year. The group operated as a Sectional
                     Committee (later redesignated as a Standards Committee), under the authorization of the
                     American Engineering Standards Committee (subsequently named American Standards
                     Association, United States of America Standards Institute and now, American National
                     Standards Institute). Sponsors for the group were the American Society of Mechanical
                     Engineers, Manufacturers Standardization Society of the Valve and Fitting Industry, and
                     the Heating and Piping Contractors National Association (later the Mechanical Con-
                     tractors Association of America).
                        The American Gas Association determined that standardization of gas valves used in
                     distribution systems was desirable and needed. The A.G.A. Task Committee on Standards
                     for Valves and Shut-Offs was formed and development work commenced in 1958. In
                     1968, it was determined that a more acceptable document would result if approval were
                     gained for the American National Standards Institute and to facilitate such action, the
                     A.G.A. Committee became B16 Subcommittee No. 13, later renamed Subcommittee L,
                     which is its current designation. In 1982, the B16 Committee was reorganized as an ASME
                     committee operating under procedures accredited by ANSI. The first standard developed
                     by the Subcommittee was ANSI €316.33.
                        As a follow-up, the B16.38 standard was subsequently developed to cover larger sizes
                     of gas valves and shut-Offs. Starting in about 1965, there was a major increase in the use
                     of plastic piping in gas distribution systems which made it desirable to have valves and
                     shut-Offs of a compatible material. 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, downstream
                     from the point of delivery (meter outlet), and upstream of the inlet to gas utilization
                     equipment, was brought to the attention of the subcommittee. To fill this need, this
                     Standard was developed.
                        This Standard has been developed so that user and manufacturers have a common basis
                     valve specification, one that can be readily used to qualify valve designs. Usage by certifying
                     bodies would make it possible for building codes to reference the Standard.
                        This Standard is being offered, by ASME, on a subscription basis that will include all
                     addenda until the next edition is published.
                        All request for interpretations or suggestionsfor revisions should be sent to the Secretary,
                     ASME B16 Main Committee, The American Society of Mechanical Engineers, 345 East
                     47th Street, New York, N.Y. 10017.
                        Following its approval by the B16 Standards Committee, this Standard was approved
                     as an American National Standard by ANSI on October 6, 1995.
iii
ASME B L 6 = 4 4 75 586
(The following is the roster of the Committee at the time of approval of this Standard.)
                                                                   OFFICERS
                                                               W. N. Mclean, Chair
                                                             R. A. Schmidt, Vice Chair
                                                              K. M. Ciciora, Secretary
                      COMMITTEE PERSONNEL
                      W. L. Ballis, Columbia Gas Distribution Co., Columbus, Ohio
                      R. R. Brodin, Fisher Controls International, Inc., Marshalltown, Iowa
                      K. M. Ciciora, Secretary, ASME, New York, New York
                      M. A. Clark, Nibco, Inc., Elkhart, Indiana
                      A. Cohen, Copper Development Association, New York, New York
                      W. C. Farrell, J,.i Consultant, Birmingham, Alabama
                      C. E. Floren, Mueller Co., Decatur, Illinois
                      D. R. Frikken, Monsanto Co., St. Louis, Missouri
                      M. W. Garland, Frick Co., Waynesboro, Pennsylvania
                      J. B. Hagan, ABS Americas, New Orleans, Louisiana
                      J. C. Inch, Mueller Brass Co., Hartsville, Tennessee
                      G. A. Jolly, Henry Vogt Machine Co., Louisville, Kentucky
                      W. G. Knecht, Consultant, Williamsport, Pennsylvania
                      R. Koester, The William Powell Co., Cincinnati, Ohio
                      W. N. McLean, Chair, Newco Valves, Palos Park, Illinois
                      F. C. Rosch, Jr., Technicon Enterprises, Inc., Lancaster, Pennsylvania
                      R. A. Schmidt, Vice Chair, Ladish Co., Russellville, Arkansas
                      W. M. Stephan, Flexitallic, Inc., Pennsauken, New Jersey
                      T. F. Stroud, Ductile Iron Pipe Research Association, Birmingham, Alabama
                      R. E. White, Richard E. White and Associates, South Bend, Indiana
                      D. A. Williams, Southern Company Services, Birmingham, Alabama
                      L. A. Willis, Dow Chemical Co., Freeport, Texas
                      W. R. Worley, Union Carbide Corp., South Charleston, West Virginia
vi
ASME 816.44 95
CONTENTS
                         1 Scope      ..............................................................................................
                                                                                              .. .        . ..
                         2 General Construction and Assembly ............... .. ...... .... .....,................
                         3 Materials ..........................................................................................
                         4 Marking ...........................................................................................
                         5 Design Qualification Tests ...................................................................
                         6 Manufacturing and Production Tests .....................................................
                         Figure
                         1 The Test Device ..............................................           ...................................       4
                         Tables
                         1 Materials for Valve Bodies, Plugs, Bonnets, Unions,
                              and Other External Parts Excluding Handles                        ........................................
                         2 Flow Capacity         ...................................................................................
                         3 Installation Torque . . .   .... ... .. .................................................................
                         4 Static Load for Bending Test..               ..............................................................
                         5 Maximum Opening and Closing Operating Torque
                              Values for Continued Operation Test                    ..................................................       6
                         Appendix
                         A References ........................................................................................                7
vii
ASME 816.44-1995
         TASLE 1 MATERIALS FOR VALVE BODIES, PLUGS, BONNETS, UNIONS, AND OTHER EXTERNAL
                                   PARTS EXCLUDING HANDLES
                            Material                                              Specification
                            Cast Iron                         ASTM Al26 Class E, ASTM A48 Class 30
                         Malleable Iron                    ASTM A40 Grade 32510, ASTM A47, ASTM A197
                          Ductile Iron                 ASTM A395, ASTM A536 Grade 60-40-18, or Grade 654512
                              Steel                           ASTM A l 08, ASTM A505, or ASTM A569
                          Cast Bronze                                       ASTM 862
                           Cast Brass                   ASTM 8584 Alloy UNS C83600, ASTM Alloy UNS C84400
                         Forged Brass                              ASTM E283 Alloy UNS C37700
                           Rod Brass                               ASTM B16 Alloy UNS C36000
                         Sintered Brass               ASTM E282 or MPIF Standard 35 Code CZP 3002, or CZP 2002
         3 MATERIALS
                                                                        4 2 Name
         3.1 Materials for Valve Bodies, Plugs, Bonnets,
                                                                          The manufacturer's name or trademark shall be
             Unions, and Other External Parts Excluding
                                                                        shown.
             Handles
           Materials known to be acceptable for compliance
                                                                        4.3 Service Identification
         with this Standard are listed in Table 1. Other metallic
         materials may be used when the product incorporating             The designation 2G shall be shown on the head,
         them meets the requirements of the Standard.                   stem, or body, denoting 2 psig gas rating. Where space
                                                                        permits, the designation B16.44 shall be added.
         3.2 Gas Resistance
                                                                        4.4 Tamper-Proof
           Ail materials including lubricants and/or sealants
         shall be resistant to the action of fuel gases such as           The designation T for tamper-proof construction
         natural, manufactured, and LP gases. Satisfactory              where tamper-proof features are not easily identifi-
         evidenceof material suitability shall be made available        able without disassembling the valve, shall be shown
         by the valve manufacturer.                                     on the head, stem, or body.
                                                                    2
                           NOTES
                           (1) For valves having different size inlet and outlet, the smaller size shall determine the minimum
                               gas flow.
                           (2) Reference Conditions. Minimum gas flow is measured in cubic feet per hour, with the valve in
                               the fully open position at an inlet pressure of 0.5 psig and a 0.3 in. water column net valve
                               pressure drop. The reported flow rate shall be corrected to conditions of 14.65 psi, 7OoF and
                               0.64 specific gravity.
             5 DESIGN QUALIFICATION TESTS                                         5.3.2 Method of Test. A valve of each size and
                                                                                type shall be tested to verify the flow in a straight run
             5.1 General
                                                                                of pipe of the size for which the valve is designed to
               Unless otherwise specified herein, each test shall be            be connected. The test shall be conducted using a
             conducted using a new unused valve at a temperature                compressible fluid and a technically acceptable pro-
             of 74'Fk 15°F.                                                     cedure such as the Instrument Society of America's
                                                                                Standard Control Valve Capacity Test Procedure,
                                                                                ANSI/ISA S75.02.
             5.2 Gas Tightness
                Gas tightness tests shall be conducted on randomly
             selected production valves of each size of each basic
             valve design. One new unused valve shall be subjected              5.4 Strength
             to both of the following tests. The valve shall not                   5.4.1 Installation Toque. The valve shall be ca-
             leak when tested as outlined under the following meth-             pable of withstanding, without deformation, break-
             ods of test.                                                       age, or leakage, the torque transmitted to the valve
                5.2.1 External Leakage. With the valve in the open              during installation. Each valve size and type shall be
             position and the outlet plugged, an internal air pres-             tested to torque values listed in Table 3.
             sure of, first, 2 in. water column and then 3 psig shall              5.4.2 Method of Test. The torque shall be applied
             be applied to the inlet of the valve.                              at the wrench grip of the valve adjacent to the piping
                The valve shall be immersed in a bath containing                connection. The torque specified shall be applied to
             water at a temperature of 74"F+15"F for a period                   the completely assembled valve to connect it to a new
             of at least 15 seconds. Leakage, as evidenced by the               clean Schedule 80 steel pipe nipple or pipe fitting with
             flow (breaking away) of bubbles shall not be per-                  threads conforming with ANSVASME B1.20.1.
             mitted. Other means of leak detection may be used                  Thread lubricants or sealants shall not be applied to
             provided the methods can be shown to be equivalent.                the pipe threads for this test.
               5.2.2 Internal Leakage Test. The valve shall then                   The specified torque shall be held for 15 minutes
             be turned to the closed position with the outlet open               f 1 minute. The valve shall then be subjected, while
             and the test in para. 5.2.1 repeated.                              the turning force is applied, to the gas tightness tests
                                                                                specified in Section 5.2. The turning force shall then
                                                                                be released and the valve removed and examined for
             5.3 Flow Capacity                                                  permanent deformation or breakage, neither is ac-
                5.3.1 General. The valve shall provide a flow not               ceptable. The valve shall then be subjected again to
             less than that specified in Table 2.                               the gas tightness tests specified in Section 5.2.
                                                                            3
ASME B L 6 - 4 4 95 0 7 5 9 6 7 0 0570735 7 1 6
              The valve shall then be struck four successive times               5.7 Continued Operation
            with an impact of 20 ft/lbs at right angles to the                     5.7.1 General. The new unused valve, at the start
            longitudinal center line of the outlet gasway, with the              and at the end of this test, shall be tested in accordance
            valve being rotated 90 deg. after each impact. After                 with the requirements in Section 5.2. The valve shall
            each impact, the valve shall be examined visually for                completely open and close upon application of a
            cracks or breakage, neither of which shall be per-                   torque not to exceed the amounts specified in Table
            mitted. The test shall then be repeated on four ad-                  5 after being operated for 10 cycles. A cycle shall
            ditional valves of the same size and type. This                      consist of one opening and closing of the valve.
            provision shall be deemed met when all five valves
            comply with the test provisions.                                       5.7.2 Method of Test. The valve shall be opened
                                                                                 and closed at a rate no greater than 2 cycles per min-
                                                                                 ute. Following the gas tightness test, the valves shall
            5.6 Bending
                                                                                 completely open and close when a torque not greater
              Each valve size and type shall be tested to dem-                   than that specified in Table 5 is applied to the valve
            onstrate that it is capable of withstanding the static               operating head in a direction to open it completely,
            load specified in Table 4 without leakage, under bend-               and then to close it.
            ing moments similar to those applied as part of a
            piping system.
                                                                                 5.8 Temperature Range
                                                                                   Each valve size and type shall be tested to dem-
               5.6.1 Method of Test. The valve under test and
                                                                                 onstrate that it is operable at metal temperatures rang-
            two 2-foot lengths of standard weight pipe shall be
                                                                                 ing from 32°F to 125°F.
            made up into a pressure-tight assembly, with the out-
            let pipe capped and the inlet pipe connected to an air                  5.8.1 Method of Test. The valve shall be main-
            pressure system. This assembly shall be placed across                tained at a temperature of 32"F13"F for a period
            two horizontal supports, spaced so that the assembly                 long enough to allow ail parts to come to equilibrium
            is supported at points 12 in. on each side of the center             temperature, as indicated by a thermocouple attached
            line of the valve. With the valve in the upright position            to the body of the valve or other suitable temperature
            (operating head up), the appropriate static load shall               measurement means. With an internal air pressure of
            then be symmetrically applied to the valve body in                   3 psig and with the valve outlet arranged to vent to
            the vertical (downward) direction.                                   atmosphere, it shall be determined that the valve can
               While being subjected to this load, the valve shall               be opened and closed.
            be checked for evidence of external leakage with bub-                   The valve shall then be maintained at a temperature
            ble forming solution with the test assembly under an                 of 125"F*5"F for a period long enough to allow all
            air pressure of 3 psig. No evidence of leakage shall                 parts to come to equilibrium temperatures. With the
            be permitted. The static load test shall then be re-                 valve subjected to an internal air pressure of 3 psig,
            peated on a new unused valve, with the valve assembly                it shall be determined that the valve can be opened
            rotated 90 deg. from the upright position. A third                   and closed.
            test shall be conducted on an unused valve with the
            valve assembly rotated 180 deg. from the upright po-
            sition. After each valve is tested, the load shall be                5.9 Seal Test
            removed and each valve shall then be subjected to the                  5.9.1 General. This test is applicable only to valves
            gas tightness tests specified in Section 5.2.                        using seals other than grease (iubricants).
                                                                             5
          5.9.2 Method of Test. Two halves of each size and            open position shall not leak in excess of two standard
        type shall be tested while connected to an air supply          cubic feet per hour.
        at a pressure of 2 psig.
                                                                       6 MANUFACTURING AND PRODUCTIONTESTS
           One valve shall be tested in the closed position with
        the outlet open to atmosphere. The other valve shall              The manufacturer shall use a quality assurance pro-
        be tested in the open position with the outlet plugged.        gram to qualify raw materials, parts, assemblies, and
        Both valves shall be placed in a chamber and held at           purchased components.
        785OF110"F for 30 minutes. The valves shall then                  The manufacturer shall test each valve covered by
        be removed and allowed to cool to room temperature.            this Standard at 1.5 times the rated pressure for gas
        When tested with the inlet pressurized at 2 psig, the          tightness to atmosphere (external leakage) and gas
        valve in the closed position shall not leak in excess          tightness through the valve (internal leakage), as de-
        of six standard cubic feet per hour. The valve in the          fined in Section 5.2.
                                                                APPENDIX A
                                                                REFERENCES
(This Appendix is an integral part of ASME B16.44-1995, and is placed after the main text for convenience.)
                        The following list of standards and specificationsare referenced in this Standard showing
                      the year of approval.
                      ASTM PUBLICATIONS
                      A 47-90                        Specification for Ferritic Malleable Iron Castings
                      A 48-92                         Specification for Gray Iron Castings
                      A 108-90a                       Specification for Steel Bars, Carbon, Cold-Finished,
                                                        Standard Quality
                      A 126-84(R1991)                 Specification for Gray Iron Castings for Valves, Flanges,
                                                        and Pipe Fittings
                      A 197-87(R1992)                 Specification for Cupola Malleable Iron
                      A 395-88                       Specification for Ferritic Ductile Iron Pressure-
                                                       Retaining Castings for Use at Elevated Temperatures
                      A 505-87                       Specification for Steel, Sheet and Strip, Alloy, Hot-Rolled,
                                                       and Cold-Rolled
                      A 536-84(R1993)                 Standard Specification for Ductile Iron Castings
                      A 569-91a                      Specification for Steel, Carbon (0.15 Maximum,
                                                       Percent), Hot-Rolled Sheet and Strip Commercial Quality
                      B 16-92                         Specification for Free-Cutting Brass Rod, Bar,
                                                        and Shapes for Use in Screw Machines
                      B 62-93                         Specification for Composition Bronze or Ounce Metal Castings
                      B 282-83a(R1990)                Specification for Sintered Brass Structural Parts
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