ASTM F1802-2015 Standard Test Method for Performance Testing of Excess Flow Valves《超流阀性能测试的标准试验方法》.pdf

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1、Designation: F1802 04 (Reapproved 2010)F1802 15Standard 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

2、 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 to determine the performance of excess flow valves (EFVs) designed to l

3、imitflow or stop flow in thermoplastic natural gas service lines.21.2 All tests are intended to be performed using air as the test 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 o

4、f EFV. One type, an excess flow valve-bypass (EFVB), allows a small amount ofgas to bleed through (bypass) after it has tripped, usually as a means of automatically resetting the device. The second type, anexcess flow valve-non bypass (EFVNB), is intended to trip shut forming an essentially gas tigh

5、t seal.1.4 The performance characteristics covered in this test method include flow at trip point, pressure drop across the EFV, bypassflow rate of the EFVB or leak rate through the EFVNB after trip, and verification that the EFV can be reset.1.4.1 Gas distribution systems may contain condensates an

6、d particulates such as organic matter, sand, dirt, and iron compounds.Field experience has shown that the operating characteristics of some EFVs may be affected by accumulations of these materials.The tests of Section 11 were developed to provide a simple, inexpensive, reproducible test that quantif

7、ies the effect, if any, of auniform coating of kerosene and of kerosene contaminated with a specified amount of ferric oxide powder on an EFVs operatingcharacteristics.1.5 Excess flow valves covered by this test method will normally have the following characteristics: a pressure rating of up to125 p

8、sig (0.86 MPa); a trip flow of between 200 and 2500 ft3/h (5.66 and 70.8 m3/h) at 10 psig (0.07 MPa); a minimum temperaturerating of 0F(18C), and a maximum temperature rating of 100F (38C).1.6 The EFVs covered by this test method shall be constructed to fit piping systems no smaller than 12 CTS and

9、no larger than114 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 6 5.5C)and 0 6 10F (18 6 5.5C). All flow rates must be corrected to standard conditions.1.8 This test method was written for EF

10、Vs installed in thermoplastic piping systems. However, it is expected that the testmethod may also be used for similar devices in other piping systems.1.9 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units tha

11、t are provided for information only and are not considered standard.1.10 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the

12、applicability of regulatorylimitations prior to use. For specific precautions, see Section 8.2. Referenced Documents2.1 ASTM Standards:3D1600 Terminology for Abbreviated Terms Relating to Plastics1 This test method is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the

13、direct responsibility of Subcommittee F17.40 on Test Methods.Current edition approved Aug. 1, 2010Nov. 1, 2015. Published November 2010May 2016. Originally approved in 1995 as PS 1395. Last previous edition approved in20042010 as F1804F180204(2010).04. DOI: 10.1520/F1802-04R10.10.1520/F1802-15.2 Thi

14、s contamination test procedure may be utilized to determine the effect, if any, of contaminants from a specific gas distribution system on the operational characteristicsof an EFV under consideration for use in that system. Condensates, oils and particulates removed from that distribution system cou

15、ld be substituted for kerosene and ironoxide. Results obtained from using reagents or contaminants other than those specified in this test method must not be used in comparison with results obtained using thereagents specified in this test method.3 For referencedASTM standards, visit theASTM website

16、, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication o

17、f what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considere

18、d the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1E177 Practice for Use of the Terms Precision and Bias in ASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Te

19、st MethodF412 Terminology Relating to Plastic Piping Systems2.2 ANSI Standard:B31.8 Gas Transmission and Distribution Piping Systems42.3 Federal Specification:DOT Part 192 Title 49 Code of Federal Regulations53. Terminology3.1 Definitions:3.1.1 GeneralDefinitions are in accordance with Terminology F

20、412, unless otherwise specified. Abbreviations are inaccordance with Terminology D1600.3.1.2 The gas industry terminology used in this test method is in accordance withANSI B31.8 or DOT Part 192 Title 49, unlessotherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2.1 bypass flow,

21、 nthe flow through an EFVB after it has been activated or tripped.3.2.2 excess flow valve (EFV), na device installed in a natural gas service line having the ability to automatically stop or limitthe flow of gas in the event that the flow in the service line exceeds a predetermined level.3.2.2.1 exc

22、ess flow valve-bypass (EFVB), nan EFV designed to limit the flow of gas upon closure to a small predeterminedlevel. The EFVBs reset automatically, once the service line downstream is made gas tight and pressure is equalized across thevalve.3.2.2.2 excess flow valve-non bypass (EFVNB), nan EFVwhich i

23、s designed to stop the flow of gas upon closure.The EFVNBsmust be manually reset.3.2.3 leak rate, nthe flow of test fluid passing through an EFVNB after it has been activated or tripped.3.2.4 Piezometer ring, na device installed at a pressure measurement point in a flowing gas stream intended to eli

24、minate theeffect of the flowing gas on the measurement device. See Appendix X1.3.2.5 pipe, nrefers to both pipe and tubing.3.2.6 standard conditions, nfor gas flow conversion, 0.6 relative density natural gas at 14.7 psia (0.1 MPa) and 60F (16.6C).3.2.7 trip, nactivation of the mechanism of an EFV t

25、o stop or limit the flow of natural gas in the service line.3.2.8 trip flow, nthe flow passing through an EFV required 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 flows are given in cubic feet per hour of 0.6 rel

26、ative density natural gas,unless otherwise specified. All tests are to be performed at 67 6 10F (19.4 6 5.5C), with alternative test temperatures of 0 and100F (17.7 and 37.7C). All flow rates must be corrected to standard conditions using the temperature of the air flow measuredjust upstream of the

27、flowmeter (T3) in Fig. 1.4.2 The EFV is installed in the standardized test apparatus shown in Fig. 1. This apparatus provides regulated inlet pressure,pressure measurement at specified locations, temperature measurement, flow measurement, and flow control. Four discrete testsare performed on each sa

28、mple, as follows:4.2.1 Trip Flow RateThe EFV is installed in the test apparatus and the flow control valve is slowly opened. At the trip point,the inlet pressure and flow rate are recorded.4.2.2 Bypass or Leak RateAfter completion of trip flow rate test, the flow past the tripped device is measured

29、on Flowmeter2. For an EFVB, this flow is the bypass flow. For an EFVNB, this flow is the leak rate.4.2.3 Pressure Drop at Flow Rates Less than Closureafter setting the inlet pressure to the desired value, pressure dropmeasurements shall be taken at each of the following flow rates that are less than

30、 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.4 Available from American National Standards Institute (A

31、NSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.Available from American National Standards Institute(ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.5 Available from Superintendent of Documents, U.S. Government Printing Office, 732 N. Capitol Street, NW, Washington, DC 2

32、0402.F1802 1525. Significance and Use5.1 This test method is intended to be used for the evaluation of EFVs manufactured for use on residential and small commercialthermoplastic natural gas service lines. Possible applications of the test include product design and quality control testing by amanufa

33、cturer and product acceptance testing by a natural gas utility.5.2 The user of this test method should be aware that the flows and pressures measured in the test apparatus may not correlatewell with those measured in a field installation. Therefore, the user should conduct sufficient tests to ensure

34、 that any specific EFVwill carry out its intended function in the actual field installation used.6. Apparatus6.1 Test Apparatus, (See Fig. 1) consisting of a compressed air supply, valves, flowmeters, Piezometer rings located at eachpressure test point, pressure gages, and thermocouples.6.1.1 The si

35、ze and capabilities of the test system should be selected to meet the needs of the application.Atest system for EFVsof one size and a single pressure range may be much less sophisticated than one designed for a wide range of sizes and multipleoperating pressure ranges.6.2 Compressed Air Supply Syste

36、m:6.2.1 The air supply system shall be able to provide clean dry air at the required test temperature for a time sufficient to obtaina test data point at the highest test pressure and at the maximum flow rate of the EFV being tested. Such a requirement may bemet either by a low-volume compressor and

37、 a large pressure vessel or by a high-volume compressor and a smaller pressure vessel.6.2.2 This test method is intended for maximum air flows up to 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 p

38、sig (0.7 MPa) for a period of 60s.6.3 Piezometer Rings:6.3.1 A Piezometer ring shall be used at each pressure test point 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 are essentialin pipes with flowing gas in them. Ap

39、pendix X1 shows the dimensions for construction of a Piezometer ring.6.4 Pressure and Differential Pressure Gages:6.4.1 Each air pressure gage or differential pressure gage shall measure the range of pressures at its location in the test apparatusto an accuracy within 62 %.6.4.2 Differential pressur

40、e gages shall be rated for pressures above the maximum encountered in the application.FIG. 1 Test Apparatus For Excess Flow ValvesF1802 153NOTE 1Do not use “snubs” on pressure gages.6.5 Flowmeters:6.5.1 Each flowmeter shall measure the range of flows at its location in the test apparatus to an accur

41、acy within 62 %, traceableto the National Institute of Standards and Technology. Note that flowmeter accuracy is usually expressed as a percent of the fullscale reading. Therefore, to maintain accuracy it is generally advisable to operate the meter at as high a flow as possible.6.5.2 Each flowmeter

42、shall have manufacturer supplied correction factors for conversion of air flow rates measured at themetering pressure and temperature to corrected flow rates of 0.6 relative density natural gas at standard conditions. Some usershave found it convenient to use flowmeters calibrated to measure air, bu

43、t that indicate flow rates for natural gas.6.5.3 Flowmeters shall not generate pressure or flow fluctuations in the flowing air stream that could adversely affect either themeasurement of these values or the operation of the EFV.6.5.4 Flowmeters shall be easy to clean and to keep clean.6.5.5 Flow Co

44、ntrol Valve BThis valve, as it is moved from full closed to full open, shall be capable of producing a uniformlyincreasing air flow. An NPS 1 valve such as a full port globe or gate valve or automated flow device have been found satisfactory.6.5.6 Inlet Valve A, Bypass Valves D, E, F, and Flow Contr

45、ol Valve CThese shall be full port NPS 1 valves.6.6 PipingUsing Schedule 40, NPS 1 steel for inlet and outlet piping and associated fittings for the EFV.6.7 ThermocoupleThree thermocouples are required and shall measure temperature to an accuracy of63F (1.7C). One shallbe installed so as to measure

46、the temperature of the EFV being tested. Two shall be installed in the flowing air stream to measurethe temperature immediately upstream of Flowmeter 1, and immediately upstream of the EFV under test.6.8 Temperature ControlThe apparatus to control test temperature shall be such that the temperature

47、of the EFV (T1) and ofthe air flow measured by the thermocouple upstream of the flowmeter (T3) shall be within 610F of 67F (5.5C of 19.4C). Fortesting at 0F (17.7C) and at 100F (37.7C), the temperature of the EFV (T1) shall be within 610F (5.5C) of the testtemperature. The test apparatus and test EF

48、V shall be insulated as appropriate so as to maintain the test temperature.6.9 Reset VolumeA60 ft (18.28 m) long coil of 12 CTS 0.090 in. (23 mm) wall PE tubing or pipe with an equivalent volumeof 112 in.3 (1,835 cm3).The inside coil radius shall not be less than 16 in. (406.4 mm) (minimum bend radi

49、us = 25 times the outsidetube diameter).7. Sample Preparation7.1 The user of this test method will select the EFV configuration to be tested. However, the configuration will affect the testresults. For example, the pressure drop and the trip-flow rate values will be different when the EFV is inserted in a straight lengthof thermoplastic pipe, as compared to an EFV inserted in the outlet of a thermoplastic punch tee. This must be borne in mind whenselecting the sample configuration.7.2 Any adapters used to install the