1、Designation:F278610Standard Practice forField Leak Testing of Polyethylene(PE)Pressure PipingSystems Using Gaseous Media Under Pressure(PneumaticLeak Testing)1This standard is issued under the fixed designation F2786;the number immediately following the designation indicates the year oforiginal adop
2、tion 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.Scope1.1 This practice provides information on apparatus,safety,pre-test preparation and
3、 procedures for conducting field tests ofpolyethylene pressure piping systems after installation usinggaseous media such as unodorized inert non-toxic gas or air,and applying pressure to determine if leaks exist in the system(pneumatic leak testing).This practice applies only to testing todiscover l
4、eakage.Testing for other purposes such as testing toestablish operating pressure is beyond the scope of thispractice.1.2 This practice does not address leak testing using pres-surized liquids(hydrostatic testing).For field leak testing usingpressurized liquids,see Practice F2164.1.3Leak testing with
5、 pressurized gaseous media shall beused only if one of the following conditions exists:1.3.1The piping system is so designed that it cannot befilled with a liquid,or1.3.2 The piping system service cannot tolerate traces ofliquid testing media.1.4 Where hydrostatic testing is specified in contract do
6、cu-ments or by the authority having jurisdiction,pressurizedgaseous media(pneumatic)testing shall not be substitutedwithout the express consent and authorization of the authorityhaving jurisdiction.1.5 Some manufacturers prohibit or restrict pressurizedgaseous media testing of their products.Contact
7、 componentmanufacturers for information about testing with gaseousmedia under pressure.Where the manufacturer of a test sectioncomponent prohibits or restricts pressurized gaseous mediatesting,pressurized gaseous media(pneumatic)testing shallnot be used without the express consent and authorization
8、ofthe authority having jurisdiction and the component manufac-turer.NOTE1Components that are not suitable for testing with gaseousmedia may not be suitable for service with pressurized gaseous media.1.6 This practice does not apply to leak testing of non-pressure,negative pressure(vacuum),or non-PE
9、piping sys-tems.For field acceptance testing of plastic gravity flow 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 petroleum gas(LP-Gas)systems,the poin
10、t 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 pressure regulator,exclusive of line ga
11、s 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 pressure(compressed gas)if the owner or o
12、perator or installer of theline does not have an established leak testing procedure that isacceptable to the authority having jurisdiction.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
13、 for information onlyand are not considered standard.Numbered notes and infor-mation in parentheses in the text of the practice are non-mandatory information.Table notes are mandatory informa-tion.1.10 WarningFailure during a pressure leak test can beextremely violent and dangerous especially where
14、a com-pressed gaseous media is used.In a compressed gaseous mediatest,energy is applied to compress the gaseous media inaddition to pressurizing the system.If failure occurs,bothenergies can be suddenly released and can be extremely violentcompared to failure during leak testing with an incompressib
15、leliquid testing media.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 occurs,energy release mayoccur in 2 s.Therefore,the horsepower of the energy release woul
16、d be 51This practice 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 Feb.1,2010.Published February 2010.DOI:10.1520/F278610.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 HP 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 d