【英文标准名称】:Plastics;determinationofthetendencyofcompoundsandproductsbasedonvinylchloridehomopolymersandcopolymerstoevolvehydrogenchlorideandanyotheracidicproductsatelevatedtemperatures;part4:potentiometricmethod
【原文标准名称】:塑料基于氯乙烯共聚物、均聚物的化合物及产物在高温下析出氯化氢和其他酸性产物的趋势测定第4部分:电位测量法
【标准号】:ISO182-4-1993
【标准状态】:现行
【国别】:国际
【发布日期】:1993-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:均聚物;电位测量法;塑料;试验;定义;热稳定性;热试验;氯化氢;模制材料;塑料制品;测定;质量控制;化学反应;分解;材料热性质;共聚物;高温试验;聚氯乙烯;高聚物;氯乙烯;稳定性
【英文主题词】:Chemicalreactions;Copolymers;Decomposition;Definitions;Determination;High-temperaturetesting;Homopolymers;Hydrogenchloride;Mouldings(shapedsection);Plastics;Plasticsproducts;Polymers;Polyvinylchloride;Potentiometricmethods;Qualitycontrol;Stability;Testing;Thermalpropertiesofmaterials;Thermalstability;Thermaltesting;Vinylchloride
【摘要】:TheprincipleofthemethodismaintainingatestportionofthePVCatanagreedtemperatureinanitrogengasstream,absorbingthehydrogenchlorideevolvedinagivenamountofanappropriatesolution,andpotentiometricallydeterminingtheamountofhydrogenchlorideevolvedinrelationtotherecordedchangeinpCloftheabsorbingsolution.ThemethodisrecommendedforcompoundedPVCmaterialsandproductsonly,althoughitcanbeusedforpolymersinpowderformunderappropriateconditions.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:14P.;A4
【正文语种】:英语


【英文标准名称】:SpecificationforExcessFlowValvesforNaturalGasService
【原文标准名称】:天然气设备溢流阀规范
【标准号】:ANSI/ASTMF2138-2001
【标准状态】:作废
【国别】:美国
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Excess;Flow;Gases;Handlingequipment;Materialstesting;Naturalgas;Naturalgasindustries;Overflowvalves;Petroleumproducts;Plasticpipes;Services;Valves
【摘要】:Thisspecificationcoversrequirementsandtestmethodsforexcessflowvalvesforuseinthermoplasticnaturalgaspipingsystems.However,itisexpectedthatexcessflowvalvesmanufacturedtotherequirementsofthisspecificationmayalsobeusedinothernaturalgaspipingsystems.Excessflowvalvescoveredbythisspecificationaredesignedforinsertionintocomponentsfornaturalgassystemssuchaspipe,tubing,orfittingsinsizesfrom1/2CTSto2IPS.Thetestsrequiredbythisspecificationareintendedtodeterminetheperformancecharacteristicsofanexcessflowvalveinstalledinastraightpieceofpipe.Anexcessflowvalvecouldpossiblybeinstalledinastraightpieceofpipe,inaserviceteeoutlet,aspartofamechanicalcoupling,orinotherconfigurations.Theperformancecharacteristicsoftheexcessflowvalvemaybesignificantlydifferentforeachinstalledconfiguration.UsersshouldconducttheirownteststodeterminetheinstalledperformancecharacteristicsorcontacttheEFVmanufacturerfortestdatafortheinstalledconfiguration.AdditionalguidanceonselectionandinstallationofexcessflowvalvesisincludedinAppendixX1.Thetestsrequiredbythisspecificationarenotintendedtoberoutinequalitycontroltests.Thevaluesgiveninparenthesesareforinformationalpurposesonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatoryrequirementspriortouse.
【中国标准分类号】:J16
【国际标准分类号】:75_200
【页数】:
【正文语种】:英语