1、Designation: F2164 13Standard Practice forField Leak Testing of Polyethylene (PE) and CrosslinkedPolyethylene (PEX) Pressure Piping Systems UsingHydrostatic Pressure1This standard is issued under the fixed designation F2164; the number immediately following the designation indicates the year oforigi
2、nal 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-tes
3、t preparation, and procedures for conducting field testsof polyethylene and crosslinked polyethylene pressure pipingsystems by filling with a liquid and applying pressure todetermine if leaks exist in the system.1.2 This practice does not address leak testing using apressurized gas (pneumatic testin
4、g). For safety reasons, somemanufacturers prohibit or restrict pneumatic pressure testing oftheir products. Failure during a pressure leak test can beexplosive, violent, and dangerous, especially if a compressedgas is used. In a compressed gas test, both the pressure stresson the system and the ener
5、gy used to compress the gas arereleased at a failure. Contact component manufacturers forinformation about testing with gas under pressure.1.3 This practice does not apply to leak testing of non-pressure, gravity-flow, negative pressure (vacuum), or non-thermoplastic piping systems. For field-testin
6、g of plastic grav-ity flow sewer lines, see Test Method F1417.1.4 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.1.5 This standard does
7、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. Additional safetyinformation is prese
8、nted in Section 7 and throughout thisstandard.2. Referenced Documents2.1 ASTM Standards:2D1600 Terminology forAbbreviated Terms Relating to Plas-ticsF412 Terminology Relating to Plastic Piping SystemsF1417 Practice for Installation Acceptance of Plastic Non-pressure Sewer Lines Using Low-Pressure Ai
9、r2.2 Other Documents:PPI TR-4-PPI Listing of Hydrostatic Design Basis (HDB),Pressure Design Bases (PDB) and Minimum RequiredStrength (MRS) Ratings for Thermoplastic Piping Mate-rials33. Terminology3.1 Abbreviations and terms are in accordance with Termi-nology D1600 and Terminology F412 unless other
10、wise indi-cated.3.2 Definitions of Terms Specific to This Standard:3.2.1 authority having jurisdiction, nthe organization,office, or individual responsible for “approving” equipmentand installation, or a procedure.3.2.1.1 DiscussionThe term “authority having jurisdic-tion” is used in this practice i
11、n a broad manner since jurisdic-tions and “approval” agencies vary, as do their responsibilities.Where public safety is concerned, the “authority havingjurisdiction” may be a federal, state, local, or other regionaldepartment or individual such as a Fire Chief, Fire Marshall,chief of a fire preventi
12、on bureau, labor department, buildingofficial, or others having statutory authority. For insurancepurposes, an insurance inspection department, rating bureau, orother insurance company representative may be the “authority1This practice is under the jurisdiction of ASTM Committee F17 on PlasticPiping
13、 Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved April 1, 2013. Published April 2013. Originallyapproved in 2007. Last previous edition approved in 2010 as F2164101. DOI:10.1520/F2164-13.2For referenced ASTM standards, visit the ASTM website, w
14、ww.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825,Irving, TX 75062, http:/www.plasticpipe.org
15、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 States1having jurisdiction.” In many circumstances, the propertyowner or his authorized engineer or agent assumes the role ofth
16、e “authority having jurisdiction”; at government installations,the commanding officer or departmental official may be the“authority having jurisdiction.”3.2.2 approved, vtacceptable to the authority having ju-risdiction.3.2.3 pressure piping system, na piping system where allcomponents in the system
17、 are pressure rated and intended forconveying a fluid under continuous internal pressure. (See alsoTerminology F412, pressure pipe and non-pressure pipe.) Toverify suitability for pressure service, consult the componentmanufacturer.NOTE 1PPI TR-4 provides information about stress ratings for somepla
18、stic materials and products.3.2.4 restraint, ntemporary or permanent structural mea-sures or devices which restrict, guide, prevent, or safely limitdisjoining or movement of piping system components whilethe system is under pressure during testing or service condi-tions. Restraint may include backfi
19、ll, anchors, thrust blocks,external clamps and tie rods (joint restraints), pipe guides, andso forth. Restraint means that if violent separation or failureoccurs during the test, any movement of components or parts issufficiently constrained such that damage or injury is pre-vented.3.2.5 system desi
20、gn pressure, nthe limiting continuousinternal pressure specified by the piping system designer.System design pressure may be less than the pressure ratings ofcomponents in the system. System design pressure may belimited by component pressure ratings, by code or applicationrequirements, or by other
21、restrictions.3.2.6 visible leakage, nthe visible escape (drip, spray,stream, flow, and so forth.) of test liquid from the test sectionthrough components, joints, connections, appurtenances, andthe like in the test section.4. Summary of Practice4.1 The section of the piping system to be tested is iso
22、latedfrom other parts of the system and restrained against movementto prevent catastrophic failure. Components that are not to besubjected to test pressure or could be damaged by test pressureare isolated or removed as necessary. Isolated components arevented to atmosphere. The test section is fille
23、d with the testingliquid, raised to the test pressure, and allowed to stabilize. Thesystem is inspected or monitored for leakage, and then testpressure is relieved. If repairs or corrections are necessary, theyare performed only when the test section is depressurized. Ifnecessary, a retest is perfor
24、med after a relaxation period.At theconclusion of an acceptable test, the test section may be placedin service. Purging and disposal of the test liquid from the testsection may be necessary.4.2 Acceptance is determined by the approval of the author-ity having jurisdiction.4.3 The authority having ju
25、risdiction may specify proce-dures or requirements for test liquid disposal or erosioncontrol.5. Significance and Use5.1 If required by the authority having jurisdiction, hydro-static pressure leak testing may be conducted to discover andcorrect leaks or faults in a newly constructed or modifiedpoly
26、ethylene or crosslinked polyethylene pressure piping sys-tem before placing the system in service. Leakage or faultsusually occur at connections, joints, and mechanical sealswhere sealing under pressure is required. (WarningSafety isof paramount importance when conducting hydrostatic pres-sure leak
27、tests because testing under pressure may causesudden violent rupture or failure.)5.2 This practice uses a pressurized liquid to test for leaks.It does not verify if a piping material or a piping system designis suitable for pressure service. The suitability of a pipingsystem for pressure service and
28、 its pressure rating or operatingpressure is determined solely by its design and its installedcomponents.5.3 Systems that are not suitable for pressure testing shouldnot be pressure tested. Such systems may contain lowerpressure rated or non-pressure rated components that cannot beisolated from test
29、 pressure, or temporary caps or closures maynot be practical. In these systems, leak inspections should beconducted during and after installation. Inspections typicallyinclude visual examination of joint appearance, mechanicalchecks of bolt or joint tightness, and other relevant examina-tions. See a
30、lso Test Method F1417.5.4 Leakage AllowanceThere is no leakage allowance fora section of heat-fusion joined polyethylene piping, becauseproperly made heat fusion joints do not leak. See 7.6.1.5.4.1 Other types of joints or connections in the system mayhave a leakage allowance. Contact the joint or c
31、onnectionmanufacturer for information.5.5 Expansion AllowanceWhen test pressure is applied,polyethylene or crosslinked polyethylene pipe will expandslightly due to elasticity and Poisson effects. To compensate forexpansion, make-up water is added during the initial expansionphase. The amount of make
32、up water (expansion allowance)will vary because expansion is not linear. This procedurecompensates for expansion with an initial expansion phase,followed by a test phase. In the test phase, expansion issuspended by slightly reducing test pressure. See 9.6.5.6 Poisson EffectWhen test pressure is app
33、lied to plasticpiping systems that have fully restrained joints (joints such asheat fusion, electrofusion, bolted flanges, and so forth.),diametrical expansion of the pipe may reduce the overall lengthof the fully restrained section. Poisson-effect length reductionmay affect or cause disjoining in o
34、ther contiguous sections thathave partially restrained or non-restrained joints, such asbell-and-spigot joints, when such joints are in-line with the testsection. To prevent Poisson-effect disjoining, take measuressuch as the installation of external joint restraints (diametricalclamps and tie-rods)
35、 on in-line non-restrained joints, installingin-line thrust anchors at the ends of the fully restrained section,or isolating the fully restrained test section from piping withnon-restrained or partially restrained joints.NOTE 2When a tensile stress is applied to a material, it will elongateF2164 132
36、in the direction of the applied stress, and will decrease in dimension atright angles to the direction of the applied stress. The ratio of decrease toelongation is the Poisson ratio. Under test pressure, piping materials willexpand slightly in diameter and contract in length slightly according to th
37、ePoisson ratio of the material.6. Apparatus and Equipment for Hydrostatic Procedures6.1 GeneralComponents such as caps, valves, blindflanges, manual or automatic air release devices, vents, andother devices that are used to isolate the test section from otherparts of the system, to purge air from th
38、e system, and to isolatecomponents that are not to be subjected to test pressure aregenerally needed.6.1.1 Test section isolation and closure components are tobe rated for pressures equal to or greater than the test pressureapplied to the test section.6.1.2 Although section isolation and closure com
39、ponentsmay only be connected to the test section for the duration of thetest, the joint between the test section and a closure or isolationcomponent should be at least as strong as joints in the testsection. Additional restraint may be required.6.1.3 Air release devices should be located at all high
40、 pointsalong the test section.6.1.4 Excessively worn or deteriorated equipment is unsuit-able and is not to be used.6.2 Test LiquidAn adequate supply of a safe test liquid,such as water, is necessary. The test liquid should be ofappropriate safety and quality so that the environment, system,test equ
41、ipment, and disposal (if necessary) are not adverselyaffected.6.2.1 Where an existing water supply is used to supply testwater, protect the existing water supply from backflow con-tamination in accordance with local codes or as required by theauthority having jurisdiction. Remove backflow protection
42、 andisolate the test section from the existing water supply beforetesting.6.2.2 Excluding retesting (if necessary), the quantity ofliquid needed to fill the internal volume of the pipe test sectionand accommodate test section expansion and possible leakageat non-fusion joints and seals is estimated
43、using:Vgal5 1.015 30.04 3 IDin.!23 Lft(1)Vm3 5 1.015 30.785 310263 IDmm!23 Lmwhere:Vgal= pipe section volume, U.S. gal,IDin.= pipe inside diameter, in.,Lft= test section length, ft,Vm3 = pipe section volume, m3,IDmm= pipe inside diameter, mm, andLm= test section length, m.6.3 Filling and Pressurizin
44、g EquipmentLiquid filling andpressurizing equipment such as pumps, and pressure regulatingdevices will usually be necessary. Filling equipment should becapable of filling the test section in a reasonable time againstany elevation head pressure that may be present. Pressurizingequipment should be abl
45、e to maintain the necessary testpressure in the test section and provide sufficient quantities ofmake-up test liquid for the duration of the test. Pressureregulating equipment should be capable of maintaining testpressure for the duration of the test.6.3.1 Filling equipment and pressurizing equipmen
46、t do notneed to be the same equipment.6.4 Pressure MonitoringUse at least one calibrated pres-sure gage or sensor accurate to within two percent (2 %) of fullscale. It is preferred that the gage or sensor full scale value notbe more than twice the test pressure, and that scale graduationsbe no great
47、er than two percent (2 %) of the full scale value.Using a valved tee, a gage cock for bleeding, a pressuresnubber, and a duplicate, back-up pressure gage are recom-mended. A continuous pressure-recording device may be re-quired.6.4.1 Locate the test pressure gage or sensor to monitor testpressure at
48、 the lowest point in the test section. Pressure may bemonitored at other points in the test section as well.NOTE 3Test pressure is a combination of pump pressure and theheight (head) of liquid in the pipeline. Therefore, test pressure is alwaysmonitored at the lowest elevation point in the section w
49、here pressure ishighest. Test pressure will be lower at higher points in the section. If aminimum test pressure at higher elevations must also be met, select testsections so that the minimum test pressure is met at the higher elevation,but do not increase test pressure at the lowest point. Excessive testpressure can cause damage or pipeline failure.6.5 Other equipment to connect the pump(s) to the testsection and the test liquid supply, control the flow of test liquid,power the pump(s), connect the pressure gage(s) or sensor(s) tothe test section, monitor pressu
