ASTM A216 WCB材質で製造された配管部品の溶接工程における溶接材料の選定方法
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工事の施工において、配管の材質はGB/T9711 L245 psl1で、エルボーの材質はASTM A216 WCBですが、溶接工程における溶接材料はどのように選定すればよいでしょうか？溶接工の合格項目はFEIかFEIIか？
ASTM A216 WCBのエルボーとテーパーを溶接する場合、どのようなワイヤーを選べばよいでしょうか？どんな溶接の資格？
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