DLT541-1994钢熔化焊角焊缝射线照相方法和质量分级.pdf

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1、中华人民共和国电力行业标准钢熔化焊角焊缝射线照相方法和质量分级MethodsofradiographictestingandclassificationofmeasuringresultsforfilletfusionweldedinsteelDL/T541一94DL/T541-94563目次1主题内容与适用范围.....................................................................‘二‘··⋯5642引用标准······································

2、·················································⋯⋯5643检验等级与像质要求·，···············································。·“···················⋯⋯5644无损检测人员·························。···················································⋯⋯5655检测设备···············“····························

3、······································⋯⋯5656工业射线胶片和增感屏·······”····························································⋯⋯5657像质计···············。···································“·····································⋯⋯5668表面状态·····················。··························

4、·····································⋯⋯5689补偿块······································。················································⋯⋯56810透照工艺·····························。························································⋯⋯57011底片的观察····································

5、·········································。······一57212焊缝质量分级·································“····“···········⋯⋯‘······················⋯⋯57213射线照相检验报告及底片存档······················································⋯⋯’··⋯57414射线照相防护····················································

6、······，·····················⋯⋯574,ii,水利水电卷.金属结构主题内容与适用范围本标准适用于电力机械、水电设备及水电建筑物钢结构中T形接头角焊缝和搭接接头角焊缝的射线照相及质量评定。其他类似结构的角焊缝也可以参照采用。本标准适用于透照厚度(指在一定透照角度下，中心射线束贯穿被检部位的厚度)为6-120mm的钢熔化焊T形接头角焊缝、搭接接头角焊缝的x射线和r射线照相方法和焊缝的质量分级2引用标准GB3323《钢熔化焊对接接头射线照相和质量分级GB3375《焊接名词术语》GB5618《线型像质计》GB4792《放射卫生防护

7、基本标准》ZBY201《工业x射线探伤机通用技术条件》ZBY202《携带式工业x射线探伤机技术条件》3检验等级与像质要求3.1检验等级及其适用范围3.1.1检验等级本标准规定了A(普通级)、B(中级)、C(高级)三种检验等级。3.1.2检验等级的适用范围3.1.2.1A级检验适用于承受静载荷的焊接钢结构件。3.1.2.2B级检验适用于承受动载荷或对焊缝强度要求较高的焊接钢结构件。3.1.2.3C级检验适用于承受交变载荷或工况条件恶劣、因破坏能引起重大灾害事故的焊接钢结构件。3.2像质要求3.2.1像质分级按底片的影像质量，射线照相的像质分为普通级、较

8、高级和高级。选用高级像质时，角焊缝表面应打磨光滑并圆滑过渡。3.2.2像质级的适用范围3.2-2.1普通像质