Two different welding processes were used in the girth welding of the domestic X70pipeline steel.
本研究采用不同的焊接工艺对X70 管线钢管进行环缝焊接。
Owing to the small diameters of conduit pipes and bracing tubes, the girth welding has to be done with one side welding both sides formation technology.
海洋平台构件中的导管、撑管，因管径小，其环焊缝只能采用单面焊双面成型焊接工艺。
The invention is used for automatic air gouging back gouging of the straight welding line and the girth welding line of the large cylindrical welding structure.
本发明用于大型圆筒形焊接结构的直焊缝和环行焊缝自动气刨清根。
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