ASTM_F_2330_-_04.pdf

Designation:F 2330 04An American National StandardStandard Test Method forEvaluating the Oxidative Resistance of Multilayer PolyolefinTubing to Hot Chlorinated Water1This standard is issued under the fixed designation F 2330;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes the general requirements forevaluating the long-term,chlorinated water,oxidative resis-tance of multilayer tubing which includes an inner layer of apolyolefin material such as PE or PEX(for example,seeSpecification F 1986 or F 1281).This test method outlines therequirements of a pressurized flow-through test system,testpressure,test-fluid characteristics,failure type,and data analy-sis.NOTE1Other known disinfecting systems(chlorine dioxide,ozone,and chloramine)are currently used for protection of potable water;however,free-chlorine is the most common system in use today.Disin-fecting systems other than chlorine have not been evaluated by thismethod.1.2 This test method is valid for polyolefin materials that arestabilized with hindered phenolic type anti-oxidants that shallbe analyzed using the Oxidative Induction Time(OIT)method(for example,D 3895).1.3 Guidelines and requirements for test temperatures,testhoop stresses,and other test criteria shall be stablished by priortesting of multilayer tubing and solid-wall PEX and PE tubing.Other related system components that typically appear in amultilayer tubing hot-and-cold water distribution system shallbe evaluated with the multilayer tubing.When testing multi-layer tubing and fittings as a system,it is recommended that theanticipated end-use fitting type(s)and material(s)be includedin the test circuit since it is known that some fitting types andmaterials can affect failure times.Specimens used shall berepresentative of the piping product(s)and material(s)underinvestigation.NOTE2The procedures described in this test method(with somemodifications of test temperatures or stresses,or both)have been used toevaluate pipes manufactured from polybutylene(PB),polyethylene(PE),polypropylene(PP),cross-linked polyethylene(PEX),and multilayer(polymer-metal composite)pipes.1.4 This test method is applicable to multilayer tubing andsystems used for transport of potable water containing free-chlorine for disinfecting purposes.The oxidizing potential ofthe test-fluid specified in this test method exceeds that typicallyfound in potable water systems across the United States.1.5 The values stated in cm-gram units are to be regarded asthe standard.The values given in parentheses are for informa-tion purposes.1.6 The following precautionary caveat pertains only to thetest method portion,Section 12,of this specification.Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2D 1600 Terminology for Abbreviated Terms Relating toPlasticsD 2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsE 177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsF 412 Terminology Relating to Plastic Piping Systems3.Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology F 412 and abbreviations shall be accordance withTerminology D 1600,unless otherwise indicated.3.1.1 ductile failure(Stage I),nfailure in the tubing wallthat is characterized by obvious localized deformation of thematerial visible with the unaided eye.Ductile failures producedwith this test method shall not be used for data analysis.3.1.2 brittle failure(Stage II),nfailure in the tubing wallthat is characterized by little or no material deformation in thefailure area and is the result of a single crack emanating fromthe interior of the tubing to the outside surface typicallyresulting in a pinhole leak.Brittle failures produced with thistest method shall not be used for data analysis.1This 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 Jan.1,2004.Published February 2004.2For 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 Summary page onthe ASTM website.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.3.1.3 environmental or oxidative failure(Stage III),nfailure in the tubing wall characterized by a large numberof cracks emanating from