Quality control of
lsaw steel pipe during welding is:
1) According to welding procedure specifications wire and flux review is correct, to prevent misuse of welding wire and flux caused by the quality of the accident.
2) To supervise welding environment, take appropriate measures after welding when welding environment is not good (temperature below 0 ℃, relative humidity greater than 90%) should be.
3) Before the expected first test welding groove dimensions, including space, blunt edge, and whether the angle and the wrong port meet the technical requirements.
4) In the submerged arc welding process inside and outside the selected welding current, welding voltage, welding speed and other parameters are correct.
5) Supervision of personnel in the submerged arc welding inside and outside welded steel pipe full advantage of the end plate arc length, straight seam steel pipe to strengthen the efficiency of the welding arc when the inner and outer plates, which helps to improve the quality of welding the pipe ends.
6) Supervision of personnel in the welding slag welding whether they are first cleaned, whether you've completely processed joint groove at whether there is oil, rust, slag, water, paint and other contaminants.
