Can argon arc root welding and manual arc cap welding be substituted with common manual arc welding on seamless steel line pipe below 5mm wall thickness with 9.5Mpa design pressure?
英
美
释义
壁厚 5mm以下的无缝钢管用于设计压力9.;5MPa的管线,能否采用普通手工电弧焊工艺代替氩弧焊打底、手工电弧焊盖面工艺施焊?
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