【英文标准名称】:Aerospace;rivetdesignvaluesstaticload,forblindrivetsaccordingtoNAS1399Dwithcountersunkhead,singleshear
【原文标准名称】:航空航天.第6部分:单剪切符合NAS1399D的沉头盲铆钉用静载荷铆钉设计值
【标准号】:DIN29735-6-1989
【标准状态】:现行
【国别】:德国
【发布日期】:1989-10
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:铆钉;航空运输;数学计算;铆接连接;沉头铆钉;紧固件;航空航天运输;航天运输;额定值;静荷载;尺寸;埋头紧固件;计算数据;断裂荷载
【英文主题词】:staticloading;rivetedjoints;aerospacetransport;fasteners;spacetransport;dimensions;countersunkfasteners;calculatingdata;rivets;breakingload;airtransport;mathematicalcalculations;blindrivets;
【摘要】:
【中国标准分类号】:V20
【国际标准分类号】:21_060_40
【页数】:2P;A4
【正文语种】:德语


【英文标准名称】:StandardTestMethodforPhosphonateinBrines
【原文标准名称】:海水中磷酸酯的试验方法
【标准号】:ASTMD6501-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D19.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:analysis;brine;colorimetric;phosphonate;scaleinhibitor;Brackishwater/brines;Colorimetricanalysis--water;Orthophosphateconversion;Phosphonate(PNA);Scaleinhibitor
【摘要】:Thistestmethodisusefulforthedeterminationoftracelevelphosphonateresiduesinbrines.Chemicaltreatmentwhichcontainphosphonatesareusedasmineralscaleandcorrosioninhibitorsingasandoildrillingandproductionoperations;andotherindustrialapplications.Often,thedecisionfortreatmentisbasedontheabilitytomeasurelowphosphonateconcentrationandnotuponperformancecriteria.Phosphonateconcentrationsaslowas0.16mg/Lhavebeenshowneffectiveincarbonatescaletreatment.Thistestmethodenablesthemeasurementofsub-mg/Lphosphonateconcentrationinbrinescontaininginterferingelements.Theprocedureincludesmeasuringtotal(see12.3.8)andfreeorthophosphate(see12.4.3)ionsandthedifferenceinconcentrationisthephosphonateconcentration.Thesamplecouldcontainorthophosphatenaturally,orfromdecompositionofthephosphonateduringprocessingorwelltreatmentorfromtreatingcompoundscontainingmoleculardehydratedphosphates.1.1Thistestmethodcoversthecolorimetricdeterminationofphosphonate(PNA)inbrinesfromgasandoilproductionoperationsintherangefrom0.1to5mg/L.1.2Thisphosphonatemethodisintendedforusetoanalyzelowconcentrationofphosphonateinbrinecontaininginterferingelements.Thistestmethodismostusefulforanalyzingphosphonateat0.1to1mg/Lrangeinbrineswithinterferingelements;however,itrequirespersonnelwithgoodanalyticalskill.1.3Thistestmethodhasbeenusedsuccessfullywithreagentwaterandbothfieldandsyntheticbrine.Itistheuser''sresponsibilitytoensurethevalidityofthistestmethodforwatersofuntestedmatrices.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,see9.1.3.
【中国标准分类号】:Z17
【国际标准分类号】:75_020
【页数】:10P.;A4
【正文语种】:英语