How to weld the straight welded pipe weld in winter?

تاريخ:2018-02-01 رأي:2283
To ensure that the perfect welding of straight seam welded pipe in winter need to follow the following steps:
First, increase the welding current positioning welding, slowing down the welding speed, the appropriate increase in cross-sectional area and length of the weld, if necessary, preheat.
Second, should not be grooved on the parent material for arc, arc extinguishing need to fill the crater.
Third, as far as possible not under the conditions of low temperature bending, correction and assembly of welding parts.
Fourth, preheating before welding, the welding process strictly maintain the interlayer temperature should not be lower than the preheating temperature.
Fifth, the use of low hydrogen or ultra-low hydrogen welding materials.
Sixth, the entire weld should be continuous welding finished, to avoid interruption.
close