ASTM D2657-2007 聚烯烃管及配件的热熔融连接用标准实施规程

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【英文标准名称】:StandardPracticeforHeatFusionJoiningofPolyolefinPipeandFittings
【原文标准名称】:聚烯烃管及配件的热熔融连接用标准实施规程
【标准号】:ASTMD2657-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F17.20
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:结构;配件;管;塑料管;塑料;塑料制品;聚烯烃;工艺;焊接
【英文主题词】:buttfusion;fitting;heatfusion;joining;pipe;polybutylene;polyethylene;polyolefin;polypropylene;saddlefusion;socketfusion
【摘要】:TheproceduresdescribedinSections7,8,and9,whenimplementedusingsuitableequipmentandproceduresineitherashoporfieldenvironment,producestrongpressure-tightjointsequaltothestrengthofthepipingmaterial.Somematerialsaremoreadaptabletoonetechniquethananother.Meltcharacteristics,averagemolecularweightandmolecularweightdistributionareinfluentialfactorsinestablishingsuitablefusionparameters;therefore,considerthemanufacturerrsquo;instructionsintheuseordevelopmentofaspecificfusionprocedure.1.1Thispracticedescribesgeneralproceduresformakingjointswithpolyolefinpipeandfittings(excludingpolyethylenepipeandfittings)bymeansofheatfusionjoiningtechniquesineitherashoporfieldenvironment.Theseproceduresaregeneralones.Specificinstructionsforheatfusionjoiningareobtainedfromproductmanufacturers.SeePracticeF2620forheatfusionjoiningofpolyethylenepipeandfittings.1.2Thetechniquescoveredareapplicableonlytojoiningpolyolefinpipeandfittingsofrelatedpolymerchemistry,forexample,polypropylenestopolypropylenes,orpolybutylenestopolybutylenes.Material,density,andflowrateshallbetakenintoconsiderationinordertodevelopuniformmeltviscositiesandformationofagoodfusionbondwhenjoiningthesamematerialtoitselfortoothermaterialsofrelatedpolymerchemistry.1.3PartsthatarewithinthedimensionaltolerancesgiveninpresentASTMspecificationsarerequiredtoproducesoundjointsbetweenpolyolefinpipeandfittingswhenusingthejoiningtechniquesdescribedinthispractice.1.4Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thetextofthispracticereferencesnotes,footnotes,andappendixeswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthepractice.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Seespecificsafetyprecautionsin3.1.1,5.2,8.2.3.1,Note8andNote9,andA1.1.
【中国标准分类号】:G33
【国际标准分类号】:25_160_40
【页数】:7P.;A4
【正文语种】: