焊缝及外观质量验收规范.doc

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1、焊缝及外观质量验收规范一．目的Purpose建立诺信达格公司焊接产品的焊缝和外观质量验收标准Thepurposeoftheprocedureistoprovideaninspectionstandardforwelding–fusion-weldedjointsqualityandcosmetic二．范围Scope所有诺信达格的焊接产品的焊缝外观检验TheprocedureisapplicablefortheweldingcosmeticinspectionofallNordsonDageproducts.三．定义和符合Def

2、initionsandSymbols1.短缺陷Shortimperfections如果焊缝长度有100mm或更长以及在100mm长度内包含的最大数量的缺陷累计长度低于25mm，那么这样的缺陷可认为是短缺陷。Incasewhentheweldsis100mmlongorlonger,imperfectionsareconsideredtobeshortimperfectionsif,inthe100mmwhichcontainsthegreatestnumberofimperfections,theirtotallengthis

3、lessthan25mm如果焊缝长度小于100mm,但是在总长范围内的缺陷累计长度小于焊缝长度的25%，那么这样的缺陷也可认为是短缺陷Incasewhentheweldislessthan100mmlong,imperfectionsareconsideredtobeshortimperfectionsiftheirtotallengthislessthan25%ofthelengthoftheweld2.符号Symbolsa–角焊缝的名义喉高nominalthroatthicknessofthefilletweldb–焊接熔

4、化金属的宽度widthofweldreinforcementh–缺陷尺寸（高度或宽度）heightorwidthofimperfections–对接焊缝的名义厚度nominalbuttweldthicknesst–壁厚或板厚8wallorplatethicknessz–角焊缝的腿长leglengthofafilletweldα-焊趾的角度angleofweldtoe四．参考文件NormativeReferencesISO5817:2007Welding–Fusion-weldedjointsinsteel,nickel,tit

5、aniumandtheiralloys(beamweldingexcluded)–QualitylevelsforimperfectionsISO6520:2007Weldingandalliedprocesses–Classificationofgeometricimperfectionsinmetallicmaterials–Part1:Fusionwelding五．标准等级的选用InspectionQualityLevelSelection下表对焊接的不同缺陷进行了分类和定义，B级为最高焊接要求的检验级别，C级为正常焊接

6、要求的检验级别，D级为较低焊接要求检验级Belowtabledefinetheweldinglimitsforimperfectionforqualitylevels.QualitylevelBcorrespondstothehighestrequirementonthefinishedweld.QualitylevelCcorrespondstothenormalrequirementonthefinishedweld.QualitylevelDcorrespondstothelowerrequirementonthefin

7、ishedweld.假如没有特殊规定，除了焊缝表面不允许有焊渣异物掺杂和不允许有为完全融合和渗透以外，所有焊接产品的检验等级为C级,参见下面的表单Ifnoanyspecifiedexceptnoslaginclusionandlackoffusion/penetration,thequalitylevelCwillbedefaultselection.Detaildefinitionreferredtothetableasbelow.8焊接缺陷名称ImperfectionDesignationISO6520-1Referenc

8、e说明Remarks厚度tmm验收标准DQualityLevelD验收标准CQualityLevelC验收标准BQualityLevelB裂纹Cracks100任何可见裂纹Anyvisualcracks>=0.5不允许NotPermitted不允许NotPermitted不允