The qualified weldingprocedure scheme for X80 pipeline steel made in Japan is: STT semi-automatic rootwelding with JM-58 welding wires and E10018-G welding rods for the fill weldingand cap welding.

• 为日本产X80钢管制定了合格的焊接工艺方案为: JM 58焊丝STT半自动根焊+E10018-G的填充盖面焊。