【英文标准名称】:Specificationforexaminationofthesurfacetextureofprecisionsteelcastings
【原文标准名称】:精加工钢铸件表面结构检验规范
【标准号】:BS7900-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-05-15
【实施或试行日期】:1998-05-15
【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】:试验设备;表面缺陷;钢;比较仪;外观检查(试验);验收(鉴定);铸钢;表面纹理;铸件;等级(质量);表面粗糙度测定
【英文主题词】:Acceptance(approval);Caststeels;Castings;Comparators;Grades(quality);Steels;Surfacedefects;Surfacetexture;Surface-roughnessmeasurement;Testequipment;Visualinspection(testing)
【摘要】:ThisBritishStandardspecifieslevelsofsurfaceroughness/textureonsteelcastingsproducedbytheresinshell,lostwax,lostpolystyreneandShawmouldingprocesses(see2.5to2.8forabriefdescriptionofeachprocess).Surfacescreatedbysubsequentfettlingoperations(see2.4)arealsoincluded.Inadditiontothedefinitiverequirements,thisstandardalsorequirestheitemsdetailedinclause4tobedocumented.Forcompliancewiththisstandard,boththedefinitiverequirementsandthedocumenteditemshavetobesatisfied.NOTE.Acceptancelevelsshouldbeagreedbetweenthecastingproducerandpurchaserbyreferencetoasetofreferencetactilecomparatorswhichrepresentthesurfacesproducedbythefourmouldingprocessesafterblasting,andalso,surfacescreatedbysubsequentfettlingoperations.AnnexAcontainsfullsizephotographsofthecomparatorplatestoassistinmakingarapidreviewoftheoverallcontentoftheset.Itisemphasized,however,thatthecomparatorsandnotthephotographsshouldbeusedtoformthebasisofagreementAgreementandacceptanceisbyvisualexaminationandtouch.note:1)ForinformationontheavailabilityofcomparatorscontacttheBSIInformationCentre,BritishStandardsHouse,389ChiswickHighRoad,LondonW44AL.
【中国标准分类号】:J31
【国际标准分类号】:77_140_80
【页数】:12P;A4
【正文语种】:英语


Product Code:SAE AMS3274
Title:Acrylonitrile Butadiene (Nbr) Rubber Sheet and Molded Shapes Nylon Cloth Reinforced Fuel Resistant
Issuing Committee:Ams P Polymeric Materials Committee
Scope:This specification covers nylon-cloth-reinforced acrylonitrile-butadiene (NBR) rubber in the form of sheet and of shapes molded and cured from partly cured sheet.