GBT3323-2005金属熔化焊焊接接头射线照相(2)

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1、ICS25.160.40J33巧黔中华人民共和国国家标准GB/T3323-2005代替GB/T3323-1987金属熔化焊焊接接头射线照相Radiographicexaminationoffusionweldedjointsinmetallicmaterials2005-07-21发布2006-01-01实施中华人民共和国国家质量监督检验检疫总局发布中国国家标准化管理委员会GB/T3323-2005目次前言·····························································

2、··················································⋯⋯班1范围·························································，·····················································⋯⋯工2规范性引用文件················································，····················，·············.....

3、········⋯⋯13术语、定义和符号·.....................................................................................................14射线透照技术分级···························。···········································.··...........···....⋯⋯15通则····································

4、·，·········································································⋯⋯26射线透照技术······································。·································，··············....·······⋯⋯37射线照相检测报告·······································································

5、···········...······⋯⋯15附录A(规范性附录)对接环焊缝100吓射线照相的最少曝光次数·································⋯⋯16附录B(规范性附录)最低像质计数值·..........................................................................21附录C(资料性附录)焊接接头射线照相缺陷评定·····················································⋯⋯28附录

6、D(资料性附录)像质计型式及规格···································，····························⋯⋯31附录E(资料性附录)胶片系统分类·························，··············.·...........⋯⋯，......⋯⋯36GB/T3323-2005月叨吕本标准是对GB/T3323-1987((钢熔化焊对接接头射线照相和质量分级》进行的修订。本标准在修订时修改采用了欧洲标准EN1435((焊缝的无损检测熔化焊缝射线照相》

7、。为了保证标准的适用性及协调性，本标准在修改采用过程中，对引用标准做了必要的处理。本标准与EN1435((焊缝的无损检测熔化焊缝射线照相》标准的主要差异有:—本标准以资料性附录的形式规定了焊接接头质量分级，而EN1435标准无质量分级的规定—本标准在修订时，为保证底片影像质量，删除了EN1435标准中规定的，在能保证同样的照相技术条件且像质计数值无变化时，不需在每张底片都放置像质计—本标准对有延迟裂纹倾向的材料，规定至少应在焊后24h以后进行射线照相检测。与原标准相比，本标准在技术内容方面主要有如下变化:—更侧重射线照相的透照

8、技术，而将焊接接头质量分级的有关规定放在了附录C中。—透照技术更注重其合理性和可操作性—在保证缺陷检出率的同时，更注重其经济性。本标准制定于1982年，本次修订系第二次修订。本标准自实施之日起，代替GB/T3323-1987((钢熔化焊对接接头射线照相和质量分级》。本标准由全