BS 5241-1-1994 建筑工地涂覆或喷涂用硬质聚氯酯(PUR)和聚异氰脲酯(PIR)泡沫塑料.第1部分:外部施覆的隔热泡沫塑料
时间:2024-04-25 16:58:25 来源: 标准资料网 作者：标准资料网 阅读：8067
【英文标准名称】:Rigidpolyurethane(PUR)andpolyisocyanurate(PIR)foamwhendispensedorsprayedonaconstructionsite-Specificationforsprayedfoamthermalinsulationappliedexternally
【原文标准名称】:建筑工地涂覆或喷涂用硬质聚氯酯(PUR)和聚异氰脲酯(PIR)泡沫塑料.第1部分:外部施覆的隔热泡沫塑料
【标准号】:BS5241-1-1994
【标准状态】:现行
【国别】:英国
【发布日期】:1994-03-15
【实施或试行日期】:1994-03-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:燃烧;施工材料;氰尿酸盐;设计;名称与符号;泡沫材料;塑料;高聚物;聚氨酯;喷涂;导热性;绝热材料;材料热性质
【英文主题词】:Combustion;Constructionmaterials;Cyanurates;Design;Designations;Foams;Plastics;Polymers;Polyurethane;Spraying(coating);Thermalconductivity;Thermalinsulatingmaterials;Thermalpropertiesofmaterials
【摘要】:ThisPartofBS5241specifiesthephysicalpropertyandcompositionalrequirementsforexternallysprayedpolyurethane(PUR)andpolyisocyanurate(PIR)foamsusedforthethermalinsulationofexternalsurfaces,e.g.roofsandstoragetanks.
【中国标准分类号】:Q18
【国际标准分类号】:91_100_60
【页数】:12P;A4
【正文语种】:英语
【英文标准名称】:Wateranalysis-Guidelinesforthedeterminationoftotalorganiccarbon(TOC)anddissolvedorganiccarbon(DOC)
【原文标准名称】:水分析.有机碳(TOC)和溶解的有机碳(DOC)总含量的测定导则
【标准号】:BSEN1484-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-10-15
【实施或试行日期】:1997-10-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:控制样品;污水;再现性;试样制备;水质试验;定量分析;碳素物质测定;地表水;有机物质测定;悬浮液;化学分析和试验;氧化法;碳;地下水;校正;试剂溶液;含量测定;饮用水;浓度(化学);化学试剂;海水;质量;水;试样
【英文主题词】:Analysis;Carbon;Carboncontent;Chemicalanalysisandtesting;Chemicalreactions;Chemicals;Concentration;Definition;Definitions;Determination;Determinationofcontent;Dilution;Groundwater;Guidelines;Inorganiccompounds;Inspection;Massconcentration;Methods;Organiccompounds;Organicmatters;Potablewater;Quality;Reducingagents;Reduction;Samplingmethods;Seawater;Sewage;Solutes;Surfacewater;Testing;Water;Wateranalysis;Waterpractice;Waterquality;Watersamples;Watertesting;Waters
【摘要】:ThisEuropeanStandardgivesguidanceforthedeterminationoforganiccarbonindrinkingwater,groundwater,surfacewater,seawaterandwastewater.Itdealswithdefinitions,interferences,reagents,andthesamplepretreatmentofwatersampleswithacontentoforganiccarbonrangingfrom0,3mg/1to1000mg/lwhilethelowervalueisonlyapplicableinspecialcases,forexampledrinkingwater,measuredwithinstrumentscapableofmeasuringtheselowlevels.Higherconcentrationsmaybedeterminedafterappropriatedilution.ThisEuropeanStandarddoesnotdealwiththeinstrument-dependentaspects.Inadditiontoorganiccarbon,thewatersamplemaycontaincarbondioxideorionsofcarbonicacid.PriortotheTOCdetermination,itisessentialthatthisinorganiccarbonisremovedbypurgingtheacidifiedsamplewithagaswhichisfreefromCO2andorganiccompounds.Alternatively,bothtotalcarbon(TC)andtotalinorganiccarbon(TIC)maybedeterminedandtheorganiccarboncontent(TOC)maybecalculatedbysubtractingthetotalinorganiccarbonfromtheTC.ThismethodisparticularlysuitableforsamplesinwhichthetotalinorganiccarbonislessthantheTOC.Purgeableorganicsubstances,suchasbenzene,toluene,cyclohexane,andchloroformmaypartlyescapeuponstripping.Inthepresenceofthesesubstances,theTOCconcentrationisdeterminedseparately,orthedifferentialmethod(TC-TIC=TOC)maybeapplied.Byusingthedifferentialmethod,thevalueoftheTOCshouldbehigherthantheTIC,oratleastofsimilarsize.Cyanide,cyanate,andparticlesofelementalcarbon(soot)whenpresentinthesample,willbedeterminedtogetherwiththeorganiccarbon.NOTE.Inthepresenceofhumicmaterial,lowvaluesmayoccurwhenUVradiationisused.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:14P.;A4
【正文语种】:英语