(1) argon arc welder must have a pressure vessel welder qualification certificate, no permit personnel are strictly prohibited to weld.
(2) in order to effectively control the speed of heating of the welded parts, should be used as far as possible to break the arc method of welding, welding wire diameter selected towel 3mm, while welding current should be given strict control, such as towel 12 * 2 instrumentation pipe joints recommended to use 60 ~ 80 amps welding current, the maximum should no...
2026.07.03
