焊缝及外观质量验收规范.doc

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The purpose of the procedure is to provide an inspection standard for welding fusion-welded joints quality and cosmetic二范围 Scope所有诺信达格的焊接产品的焊缝外观检验The procedure is applicable for the welding cosmetic inspection of all Nordson Dage products. 三定义和符合 Definitions and Symbols1. 短缺陷 Short imperfections 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。In case when the welds is 100mm long or longer, imperfections are considered to be short imperfections if, in the 100mm which contains the greatest number of imperfections , their total length is less than 25mm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In case when the weld is less than 100mm long, imperfections are considered to be short imperfections if their total length is less than 25% of the length of the weld2. 符号 Symbolsa 角焊缝的名义喉高nominal throat thickness of the fillet weldb 焊接熔化金属的宽度width of weld reinforcementh 缺陷尺寸（高度或宽度）height or width of imperfections 对接焊缝的名义厚度 nominal butt weld thicknesst 壁厚或板厚wall or plate thicknessz 角焊缝的腿长leg length of a fillet weld- 焊趾的角度angle of weld toe四参考文件 Normative ReferencesISO 5817:2007 Welding Fusion-welded joints in steel, nickel, titanium and their alloys( beam welding excluded) Quality levels for imperfectionsISO 6520:2007 Welding and allied processes Classification of geometric imperfections in metallic materials Part 1: Fusion welding五标准等级的选用 Inspection Quality Level Selection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级为正常焊接要求的检验级别，D级为较低焊接要求检验级 Below table define the welding limits for imperfection for quality levels. Quality level B corresponds to the highest requirement on the finished weld.Quality level C corresponds to the normal requirement on the finished weld. Quality level D corresponds to the lower requirement on the finished weld.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 If no any specified except no slag inclusion and lack of fusion / penetration, the quality level C will be default selection. Detail definition referred to the table as below.焊接缺陷名称Imperfection DesignationISO6520-1 Reference说明Remarks厚度 t mm验收标准DQuality Level D验收标准CQuality Level C验收标准BQuality Level B裂纹Cracks100任何可见裂纹Any visual cracks =0.5不允许Not Permitted不允许Not Permitted不允许Not Permitted弧坑裂纹Crater Crack104=0.5不允许Not Permitted不允许Not Permitted不允许Not Permitted表面气孔Surface Pores2017单个气孔的最大尺寸Maximum dimension of a single pore for- 对接焊缝 Butt welds- 角焊缝 Fillet welds0.5 to 3d =0.3 sd3d =0.3s, but max. 3mmd= 0.3a, but max. 3mmd =0.2s, but max. 3mmd= 0.3a, but max. 3mm不允许Not Permitted开口弧坑Crater pipe20250.5 to 3h 3h =0.2t, but max.2mmh =0.5不允许Not Permitted不允许Not Permitted不允许Not Permitted焊接缺陷名称Imperfection DesignationISO6520-1 Reference说明Remarks厚度 t mm验收标准DQuality Level D验收标准CQuality Level C验收标准BQuality Level B根部未焊透Incomplete4021只适用于单边对接焊缝Only for single side butt welds=0.5短缺陷允许存在：Short imperfectionsh =0.2t, but max.2mm不允许Not Permitted不允许Not Permitted连续咬边Continuous undercut间断咬边Intermittent undercut50115012要求圆滑过渡Smooth transition is required.不能连续出现This is not regarded as a systematic imperfection0.5 to 3短缺陷允许存在Short imperfections:h = 0.2t短缺陷允许存在Short imperfections:h 3h =0.2 t, but max. 1mmh =0.1 t, but max. 0.5mmh =0.05 t, but max. 0.5mm根凹Shrinkage groove5013要求圆滑过渡Smooth transition is required0.5 to 3h =0.2mm+0.1 t短缺陷允许存在Short imperfections:h 3短缺陷允许存在Short imperfections:h = 0.2t but max. 2mm短缺陷允许存在Short imperfections:h = 0.1t but max.1mm短缺陷允许存在Short imperfections:h =0.5h =1mm+0.25b, but max. 10mmh =1mm+0.15b, but max. 7mmh =0.5 h =1mm+0.25b, but max. 5mmh =1mm+0.15b, but max. 4mmh =1mm+0.1b, but max. 3mm焊透过大Excess penetration5040.5 to 3h =1mm+0.6bh =1mm+0.3bh 3h =1mm+1.0b, but max. 5mmh =1mm+0.6b, but max. 4mmh =a, a2=a=0.5a =90a =100a =150=0.5a =90a =110a =110焊接缺陷名称Imperfection DesignationISO6520-1 参考号ISO6520-1 Reference说明Remarks厚度 t mm验收标准DQuality Level D验收标准CQuality Level C验收标准BQuality Level B焊瘤Overlap506=0.5h =0.2b 不允许Not Permitted不允许Not Permitted未焊满Sagging Incomplete filled groove5095110.5 to 3短缺陷允许存在Short imperfections:h = 0.25t短缺陷允许存在Short imperfections:h 3短缺陷允许存在Short imperfections:h = 0.25t but max. 2mm短缺陷允许存在Short imperfections:h = 0.1t but max.1mm短缺陷允许存在Short imperfections:h =0.5不允许Not Permitted不允许Not Permitted不允许Not Permitted焊脚不对称(腿长不等)Excessive asymmetry of fillet weld (excessive unequal leg length)512当焊脚不等时In case where an asymmetric fillet weld has not been prescribed=0.5h =2mm+0.2 ah =2mm+0.15 ah =2mm+0.15 a焊接缺陷名称Imperfection DesignationISO6520-1 参考号ISO6520-1 Reference说明Remarks厚度 t mm验收标准DQuality Level D验收标准CQuality Level C验收标准BQuality Level B根凹Root concavity515要求圆滑过渡Smooth transition is required0.5 to 3h =0.2mm+0.1 t短缺陷允许存在Short imperfections:h 3短缺陷允许存在Short imperfections:h = 0.2t, but max.2mm短缺陷允许存在Short imperfections:h = 0.1t, but max.1mm短缺陷允许存在Short imperfections:h =0.5局部允许Locally permitted不允许Not Permitted不允许Not Permitted接头不良Poor Restart517=0.5允许：根据接头不良出现的位置Permitted:The limit depends on the type of imperfection occurred due to restart不允许Not Permitted不允许Not Permitted焊接缺陷名称Imperfection DesignationISO6520-1 参考号ISO6520-1 Reference说明Remarks厚度 t mm验收标准DQuality Level D验收标准CQuality Level C验收标准BQuality Level B角焊缝填充金属过薄Insufficient throat thickness5213不适用较大的熔深工艺Not applicable to processes with proof of greater depth of penetration0.5 to 3短缺陷允许存在Short imperfections:h = 0.2mm短缺陷允许存在Short imperfections:h 3短缺陷允许存在Short imperfections:h = 0.3mm+0.1a,but max. 2mm短缺陷允许存在Short imperfections:h =0