1、Designation: F1802 04 (Reapproved 2010)An American National StandardStandard 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
2、revision, the year of last revision. 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
3、(EFVs)designed to limit flow or stop flow 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 reco
4、gnizes two types of EFV. One type,an excess 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 essen
5、tially gas tight seal.1.4 The performance characteristics 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 c
6、ondensates andparticulates such as organic matter, sand, 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 tes
7、t that quantifiesthe effect, if any, of a uniform coating of kerosene 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
8、 up to 125 psig (0.86 MPa); a trip flow of between 200 and2500 ft3/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 than1
9、2 CTS and nolarger than 114 IPS, including both pipe and tubing sizes.1.7 Tests 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 writt
10、en for EFVs installed inthermoplastic piping systems. However, it is expected that 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 uni
11、ts that are provided for information onlyand are not considered standard.1.10 This standard 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
12、 the applica-bility of regulatory limitations prior to use. For specificprecautions, see Section 8.2. Referenced Documents2.1 ASTM Standards:3D1600 Terminology for Abbreviated Terms Relating toPlasticsF412 Terminology Relating to Plastic Piping Systems2.2 ANSI Standard:B31.8 Gas Transmission and Dis
13、tribution Piping Systems42.3 Federal Specification:DOT Part 192 Title 49 Code of Federal Regulations51This test method is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved Aug. 1, 2010
14、. Published November 2010. Originallyapproved in 1995 as PS 1395. Last previous edition approved in 2004 asF180404. DOI: 10.1520/F1802-04R10.2This contamination test procedure may be utilized to determine the effect, ifany, of contaminants from a specific gas distribution system on the operationalch
15、aracteristics of an EFV under consideration for use in that system. Condensates,oils and particulates removed from that distribution system could be substituted forkerosene and iron oxide. Results obtained from using reagents or contaminants otherthan those specified in this test method must not be
16、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 Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summ
17、ary 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.5Available from Superintendent of Docum
18、ents, U.S. Government PrintingOffice, 732 N. Capitol Street, NW, Washington, DC 20402.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3. Terminology3.1 Definitions:3.1.1 GeneralDefinitions are in accordance with Termi-nology F412, un
19、less otherwise specified. Abbreviations are inaccordance with Terminology D1600.3.1.2 The gas industry terminology used in this test methodis in accordance with ANSI B31.8 or DOT Part 192 Title 49,unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2.1 bypass flow, nthe f
20、low through an EFVB after it hasbeen activated or tripped.3.2.2 excess flow valve (EFV), na device installed in anatural gas service line having the ability to automatically stopor limit the flow of gas in the event that the flow in the serviceline exceeds a predetermined level.3.2.2.1 excess flow v
21、alve-bypass (EFVB), nan EFV de-signed to limit the flow of gas upon closure to a smallpredetermined level. The EFVBs reset automatically, once theservice line downstream is made gas tight and pressure isequalized across the valve.3.2.2.2 excess flow valve-non bypass (EFVNB), nan EFVwhich is designed
22、 to stop the flow of gas upon closure. TheEFVNBs must be manually reset.3.2.3 leak rate, nthe flow of test fluid passing through anEFVNB after it has been activated or tripped.3.2.4 Piezometer ring, na device installed at a pressuremeasurement point in a flowing gas stream intended toeliminate the e
23、ffect of the flowing gas on the measurementdevice. See Appendix X1.3.2.5 pipe, nrefers to both pipe and tubing.3.2.6 standard conditions, nfor gas flow conversion, 0.6relative density natural gas at 14.7 psia (0.1 MPa) and 60F(16.6 C).3.2.7 trip, nactivation of the mechanism of an EFV tostop or limi
24、t the flow of natural gas in the service line.3.2.8 trip flow, nthe flow passing through an EFV re-quired to cause its activation to stop or limit flow.4. Summary of Test Method4.1 For all tests, air is intended to be the test fluid. All flowsare given in cubic feet per hour of 0.6 relative density
25、naturalgas, unless otherwise specified. All tests are to be performed at67 6 10F (19.4 6 5.5C), with alternative test temperatures of0 and 100F (17.7 and 37.7C). All flow rates must becorrected to standard conditions using the temperature of theair flow measured just upstream of the flowmeter (T3)in
26、Fig.1.4.2 The EFV is installed in the standardized test apparatusshown in Fig. 1. This apparatus provides regulated inletpressure, pressure measurement at specified locations, tem-perature measurement, flow measurement, and flow control.Four discrete tests are performed on each sample, as follows:4.
27、2.1 Trip Flow RateThe EFV is installed in the testapparatus and the flow control valve is slowly opened. At thetrip point, the inlet pressure and flow rate are recorded.4.2.2 Bypass or Leak RateAfter completion of trip flowrate test, the flow past the tripped device is measured onFlowmeter 2. For an
28、 EFVB, this flow is the bypass flow. For anEFVNB, this flow is the leak rate.FIG. 1 Test Apparatus For Excess Flow ValvesF1802 04 (2010)24.2.3 Pressure Drop at Flow Rates Less than Closureaftersetting the inlet pressure to the desired value, pressure dropmeasurements shall be taken at each of the fo
29、llowing flow ratesthat are less than the valves minimum closure flow rate: 100,200, 300, 400, 500, 750, 1000, 1250, and 1500 SCFH (2.8, 5.6,8.5, 11.32, 14.2, 21.24, 28.3, 35.4, and 42.5 M3/h).4.2.4 ResetFollowing the manufacturers instructions,verify that the EFV can be reset.5. Significance and Use
30、5.1 This test method is intended to be used for the evalua-tion of EFVs manufactured for use on residential and smallcommercial thermoplastic natural gas service lines. Possibleapplications of the test include product design and qualitycontrol testing by a manufacturer and product acceptancetesting
31、by a natural gas utility.5.2 The user of this test method should be aware that theflows and pressures measured in the test apparatus may notcorrelate well with those measured in a field installation.Therefore, the user should conduct sufficient tests to ensurethat any specific EFV will carry out its
32、 intended function in theactual field installation used.6. Apparatus6.1 Test Apparatus, (See Fig. 1) consisting of a compressedair supply, valves, flowmeters, Piezometer rings located at eachpressure test point, pressure gages, and thermocouples.6.1.1 The size and capabilities of the test system sho
33、uld beselected to meet the needs of the application. A test system forEFVs of one size and a single pressure range may be much lesssophisticated than one designed for a wide range of sizes andmultiple operating pressure ranges.6.2 Compressed Air Supply System:6.2.1 The air supply system shall be abl
34、e to provide cleandry air at the required test temperature for a time sufficient toobtain a test data point at the highest test pressure and at themaximum flow rate of the EFV being tested. Such a require-ment may be met either by a low-volume compressor and alarge pressure vessel or by a high-volum
35、e compressor and asmaller pressure vessel.6.2.2 This test method is intended for maximum air flows upto 2500 ft3/h (70.8 m3/h). However, for many applications, anominal requirement would be for an air flow of 1000 ft3/h(28.32 m3/h) at a pressure of 100 psig (0.7 MPa) for a periodof 60 s.6.3 Piezomet
36、er Rings:6.3.1 A Piezometer ring shall be used at each pressure testpoint as shown in Fig. 1.6.3.2 Piezometer rings are designed to provide a flow-independent measurement of the pressure in a pipe. They areessential in pipes with flowing gas in them. Appendix X1shows the dimensions for construction
37、of a Piezometer ring.6.4 Pressure and Differential Pressure Gages:6.4.1 Each air pressure gage or differential pressure gageshall measure the range of pressures at its location in the testapparatus to an accuracy within 62%.6.4.2 Differential pressure gages shall be rated for pressuresabove the maxi
38、mum encountered in the application.NOTE 1Do not use “snubs” on pressure gages.6.5 Flowmeters:6.5.1 Each flowmeter shall measure the range of flows at itslocation in the test apparatus to an accuracy within 62%,traceable to the National Institute of Standards and Technology.Note that flowmeter accura
39、cy is usually expressed as a percentof the full scale reading. Therefore, to maintain accuracy it isgenerally advisable to operate the meter at as high a flow aspossible.6.5.2 Each flowmeter shall have manufacturer suppliedcorrection factors for conversion of air flow rates measured atthe metering p
40、ressure and temperature to corrected flow ratesof 0.6 relative density natural gas at standard conditions. Someusers have found it convenient to use flowmeters calibrated tomeasure air, but that indicate flow rates for natural gas.6.5.3 Flowmeters shall not generate pressure or flow fluc-tuations in
41、 the flowing air stream that could adversely affecteither the measurement of these values or the operation of theEFV.6.5.4 Flowmeters shall be easy to clean and to keep clean.6.5.5 Flow Control Valve BThis valve, as it is movedfrom full closed to full open, shall be capable of producing auniformly i
42、ncreasing air flow. An NPS 1 valve such as a fullport globe or gate valve or automated flow device have beenfound satisfactory.6.5.6 Inlet Valve A, Bypass Valves D, E, F, and Flow ControlValve CThese shall be full port NPS 1 valves.6.6 PipingUsing Schedule 40, NPS 1 steel for inlet andoutlet piping
43、and associated fittings for the EFV.6.7 ThermocoupleThree thermocouples are required andshall measure temperature to an accuracy of 63F (1.7C).One shall be installed so as to measure the temperature of theEFV being tested. Two shall be installed in the flowing airstream to measure the temperature im
44、mediately upstream ofFlowmeter 1, and immediately upstream of the EFV under test.6.8 Temperature ControlThe apparatus to control testtemperature shall be such that the temperature of the EFV (T1)and of the air flow measured by the thermocouple upstream ofthe flowmeter (T3) shall be within 610F of 67
45、F (5.5C of19.4C). For testing at 0F (17.7C) and at 100F (37.7C),the temperature of the EFV (T1) shall be within 610F (5.5C)of the test temperature. The test apparatus and test EFV shall beinsulated as appropriate so as to maintain the test temperature.6.9 Reset VolumeA60 ft (18.28 m) long coil of12
46、CTS0.090 in. (23 mm) wall PE tubing or pipe with an equivalentvolume of 112 in.3(1,835 cm3). The inside coil radius shall notbe less than 16 in. (406.4 mm) (minimum bend radius = 25times the outside tube diameter).7. Sample Preparation7.1 The user of this test method will select the EFVconfiguration
47、 to be tested. However, the configuration willaffect the test results. For example, the pressure drop and thetrip-flow rate values will be different when the EFV is insertedin a straight length of thermoplastic pipe, as compared to anEFV inserted in the outlet of a thermoplastic punch tee. Thismust
48、be borne in mind when selecting the sample configura-tion.F1802 04 (2010)37.2 Any adapters used to install the EFV in the testapparatus shall not restrict the flow to a degree which contrib-utes to the measured pressure drop. In addition, these adaptersshall not generate pressure or fluctuations in
49、the flowing airstream that could adversely affect either the measurement ofthese values or the operation of the EFV. Five samples of eachEFV shall be tested in accordance with Section 10.8. Precautions and Safety Considerations8.1 Test personnel shall be trained in the use and operationof this test apparatus and be familiar with safe use ofcompressed air. Any outlets or relief vents from the air systemshould be directed away from the areas occupied by personnel.Face, eye, hand, and hearing protection should be worn asne
