1、Designation:F180204(Reapproved 2010)Standard Test Method forPerformance Testing of Excess Flow Valves1This standard is issued under the fixed designation F1802;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision
2、.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a standardized method todetermine the performance of excess flow valves(EFVs)designed to limit flow or stop flow
3、 in thermoplastic natural gasservice lines.21.2 All tests are intended to be performed using air as thetest fluid.Unless otherwise stated,all flow rates are reported instandard cubic feet per hour of 0.6 relative density natural gas.1.3 The test method recognizes two types of EFV.One type,an excess
4、flow valve-bypass(EFVB),allows a small amount ofgas to bleed through(bypass)after it has tripped,usually as ameans of automatically resetting the device.The second type,an excess flow valve-non bypass(EFVNB),is intended to tripshut forming an essentially gas tight seal.1.4 The performance characteri
5、stics covered in this testmethod include flow at trip point,pressure drop across theEFV,bypass flow rate of the EFVB or leak rate through theEFVNB after trip,and verification that the EFV can be reset.1.4.1 Gas distribution systems may contain condensates andparticulates such as organic matter,sand,
6、dirt,and iron com-pounds.Field experience has shown that the operating charac-teristics of some EFVs may be affected by accumulations ofthese materials.The tests of Section 11 were developed toprovide a simple,inexpensive,reproducible test that quantifiesthe effect,if any,of a uniform coating of ker
7、osene and ofkerosene contaminated with a specified amount of ferric oxidepowder on an EFVs operating characteristics.1.5 Excess flow valves covered by this test method willnormally have the following characteristics:a pressure ratingof up to 125 psig(0.86 MPa);a trip flow of between 200 and2500 ft3/
8、h(5.66 and 70.8 m3/h)at 10 psig(0.07 MPa);aminimum temperature rating of 0F(18C),and a maximumtemperature rating of 100F(38C).1.6 The EFVs covered by this test method shall be con-structed to fit piping systems no smaller than12CTS and nolarger than 114IPS,including both pipe and tubing sizes.1.7 Te
9、sts will be performed at 67 6 10F(19.4 6 5.5C).Alternative optional test temperatures are 100 6 10F(37.7 65.5C)and 0 6 10F(18 6 5.5C).All flow rates must becorrected to standard conditions.1.8 This test method was written for EFVs installed inthermoplastic piping systems.However,it is expected that
10、thetest method may also be used for similar devices in otherpiping systems.1.9 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.10 This s
11、tandard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For specificprecautions,see
12、Section 8.2.Referenced Documents2.1 ASTM Standards:3D1600 Terminology forAbbreviated Terms Relating to Plas-ticsF412 Terminology Relating to Plastic Piping Systems2.2 ANSI Standard:B31.8 Gas Transmission and Distribution Piping Systems41This test method is under the jurisdiction of ASTM Committee F1
13、7 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved Aug.1,2010.Published November 2010.Originallyapproved in 1995 as PS 1395.Last previous edition approved in 2004 asF180404.DOI:10.1520/F1802-04R10.2This contamination test proced
14、ure may be utilized to determine the effect,ifany,of contaminants from a specific gas distribution system on the operationalcharacteristics of an EFV under consideration for use in that system.Condensates,oils and particulates removed from that distribution system could be substituted forkerosene an
15、d iron oxide.Results obtained from using reagents or contaminants otherthan those specified in this test method must not be used in comparison with resultsobtained using the reagents specified in this test method.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Custo
16、mer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036.Available from American National StandardsInstitute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.3 Federal Specificat
