【英文标准名称】:Insulatingandsheathingmaterialsofelectriccables.MethodsoftestspecifictoPVCcompounds.Lossofmasstest.Thermalstabilitytest
【原文标准名称】:电缆的绝缘与铠装材料.第3部分:特定的聚氯乙烯化合物的试验方法.质量的损耗试验.热稳定性试验
【标准号】:BS6469Sec.3.2-1992
【标准状态】:作废
【国别】:英国
【发布日期】:1992-08-15
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:挥发物测定;热稳定性;加热试验;护套电缆;电缆护套;电绝缘材料;试样制备;试验条件;化学分析和试验;试样;定型试验;聚氯乙烯;高聚物;塑料;绝缘电缆;电缆;电绝缘;固体绝缘材料
【英文主题词】:
【摘要】:
【中国标准分类号】:K13
【国际标准分类号】:
【页数】:20P;A4
【正文语种】:英语


【英文标准名称】:StandardGuideforMaintenanceandRehabilitationofGround-WaterMonitoringWells
【原文标准名称】:地下水探井的维修和修复的标准指南
【标准号】:ASTMD5978-1996(2005)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:D18.21
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:biofouling;development;encrustation;groundwater;maintenance;monitoringwell;rehabilitation
【摘要】:Theprocessofoperatinganyengineeredsystem,suchasmonitoringwells,includesactivemaintenancetoprevent,mitigate,orreversedeterioration.Lackoforimpropermaintenancecanleadtowellperformancedeficiencies(physicalproblems)orsamplequalitydegradation(chemicalproblems).Theseproblemsareintrinsictomonitoringwells,whichareoftenleftidleforlongperiodsoftime(aslongasayear),installedinnon-aquifermaterials,andinstalledtoevaluatecontaminationthatcancauselocallyanomaloushydrogeochemicalconditions.Thetypicalsolutionsforthesephysicalandchemicalproblemsthatwouldbeappliedbyownersandoperatorsofwatersupply,dewatering,recharge,andotherwellsmaynotbeappropriateformonitoringwellsbecauseoftheneedtominimizetheirimpactontheconditionsthatmonitoringwellswereinstalledtoevaluate.Thisguidecoversactionsandprocedures,butisnotanencyclopedicguidetowellmaintenance.Wellmaintenanceplanningandexecutionishighlysiteandwellspecific.Thedesignofmaintenanceandrehabilitationprogramsandtheidentificationoftheneedforrehabilitationshouldbebasedonobjectiveobservationandtesting,andbyindividualsknowledgeableandexperiencedinwellmaintenanceandrehabilitation.Usersofthisguideareencouragedtoconsultthereferencesprovided.ForadditionalinformationseeTestMethodsD1889,D4412,D5472,andGuidesD4448,D5409,D5410andD5474.1.1Thisguidecoversanapproachtoselectingandimplementingawellmaintenanceandrehabilitationprogramforground-watermonitoringwells.Itprovidesinformationonsymptomsofproblemsordeficienciesthatindicatetheneedformaintenanceandrehabilitation.Itislimitedtomonitoringwells,thataredesignedandoperatedtoprovideaccessto,representativewatersamplesfrom,andinformationaboutthehydraulicpropertiesofthesaturatedsubsurfacewhileminimizingimpactonthemonitoredzone.Somemethodsdescribedhereinmayapplytoothertypesofwellsalthoughtherangeofmaintenanceandrehabilitationtreatmentmethodssuitableformonitoringwellsismorerestrictedthanforothertypesofwells.Monitoringwellsincludetheirassociatedpumpsandsurfaceequipment.1.2Thisguideisaffectedbygovernmentalregulationsandbysitespecificgeological,hydrogeological,geochemical,climatological,andbiologicalconditions.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:D04
【国际标准分类号】:13_060_10
【页数】:7P.;A4
【正文语种】: