1、Designation:F278616Standard Practice forField Leak Testing of Polyethylene(PE)Pressure PipingSystems Using Gaseous Testing Media Under Pressure(Pneumatic Leak Testing)1This standard is issued under the fixed designation F2786;the number immediately following the designation indicates the year oforig
2、inal adoption or,in the case of 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.Scope*1.1 This practice provides information on apparatus,safety,pre-test prepa
3、ration and procedures for conducting field tests ofpolyethylene pressure piping systems after installation usinggaseous testing media such as unodorized inert non-toxic gasor air,and applying pressure to determine if leaks exist in thesystem(pneumatic leak testing).This practice applies only totesti
4、ng to discover leakage.Testing for other purposes such astesting to establish operating pressure is beyond the scope ofthis practice.1.2Leak testing with pressurized gaseous testing mediashall be used only if one or both of the following conditionsexists:1.2.1The piping system is so designed that it
5、 cannot befilled with a liquid,or1.2.2 The piping system service cannot tolerate traces ofliquid testing fluid.1.3 Where hydrostatic testing is specified in contract docu-ments or by the authority having jurisdiction,testing usingpressurized gaseous testing media(pneumatic)testing shall notbe substi
6、tuted without the express consent and authorization ofthe authority having jurisdiction.1.4 Some manufacturers prohibit or restrict testing of theirproducts with pressurized gaseous testing media.Contactcomponent manufacturers for information.Where the manu-facturer of a test section component prohi
7、bits or restrictstesting with pressurized gaseous testing media testing inaccordance with this practice shall not be used without theexpress consent and authorization of the authority havingjurisdiction and the component manufacturer.NOTE1Components that are not suitable for testing with gaseoustest
8、ing fluid may not be suitable for service with pressurized gaseous fluid.1.5 This practice does not address leak testing using pres-surized liquids(hydrostatic testing).For field leak testing usingpressurized liquids,see Practice F2164.1.6 This practice does not apply to leak testing of non-pressure
9、,negative pressure(vacuum),or non-PE piping sys-tems.For field acceptance testing of plastic non-pressure sewerlines,see Test Method F1417.1.7 This practice does not apply to fuel gas piping systemsthat extend from the point of delivery to the applianceconnections.For other than undiluted liquefied
10、petroleum gas(LP-Gas)systems,the point of delivery shall be considered tobe the outlet of the service meter assembly or the outlet of theservice regulator or service shutoff valve where no meter isprovided.For undiluted LP-Gas,the point of delivery shall beconsidered to be the outlet of the final pr
11、essure regulator,exclusive of line gas regulators,in the system.Testing for thesesystems can be found in NFPA54/ANSI Z223.1.This practicedoes not apply to LP-Gas systems covered under NFPA 58.1.8 This practice is intended for use with polyethylenepressure piping that conveys gaseous media under pres
12、sure(compressed gas)if the owner or operator or installer of theline does not have an established leak testing procedure that isacceptable to the authority having jurisdiction.1.9 WarningFailure during a pressurized gaseous testingmedia leak test can be extremely violent and dangerousbecause energy
13、that is applied to compress the gaseous testingmedia and to pressurize the system will both be suddenlyreleased.NOTE2To illustrate the violent hazard of failure,assume a 5 Hpcompressor is used to raise the test section to test pressure and that it takes1 h to achieve test pressure.If sudden rupture
14、occurs,energy release mayoccur in 2 s.Therefore,the horsepower of the energy release would be 5HP 1 h 3600 sec/h/2 s=9,000 Hp.Further,if diameter is doubled,energy release is four times greater.For an example test section that istwice the diameter,energy release would be 36,000 Hp.1.10 The values st
15、ated in inch-pound units are to be re-garded as standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.Numbered1This practice is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and i
16、s the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved Feb.1,2016.Published March 2016.Originallyapproved in 2010.Last previous edition approved in 2010 as F278610.DOI:10.1520/F278616.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 notes and information in parentheses in the text of the practiceare non-mandatory information.Table notes
