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原文
Important welding cast steel valve Pressure test for leaks in castings, welding area> 65cm2 casting, depth of> 20% or 25mm casting wall thickness of castings, ASTMA217/A217M-2007 are considered to be important in repair welding. A217 welding of such important proposed standard should be to deal with stress or fully coupled heat, and this completely coupled to the heat treatment or stress, must be qualified by the validation method, that is an important need to develop welding welding process. ASTMA352/A352M2006 specified, it is important to stress after welding or weld heat treatment is mandatory. And A217/A217M corresponding standard JB/T5263-2005 our industry will be important welding is defined as "severe defects." But in fact, in addition to rough castings can be fully coupled with the heat, many defects are often found in the finishing process, and can no longer fully heat treated. Therefore, the production practice is usually held by experienced welders pressure vessel welding certificate in the field with effective solutions.
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译文：
水压试验有渗漏的铸件、补焊面积>65cm2的铸件,深度>铸件壁厚20%或25mm的铸件,ASTMA217/A217M-2007中均认为是重要补焊。对此种重要补焊A217标准中提出,都应进行去应力处理或完全再加热处理,而这种去应力处理或完全再加热处理,必须用经审定合格的方法进行,即重要补焊需制订补焊工艺。ASTMA352/A352M2006中规定,重要补焊后的去应力或焊后热处理是强制要求。与A217/A217M相对应的我国行业标准JB/T5263-2005中将重要补焊定义为“重缺陷”。但事实上,除铸件毛坯可以完全再加热处理外,许多缺陷往往是在精加工过程中才发现的,已无法再完全热处理。因此,生产实践中,通常是由有经验的持有压力容器焊接证书的焊工在现场用有效的方法解决。

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