1.The pipe elongation of welded pipe equipment is generally about 4-5mm, otherwise it will cause defects, which is particularly important.

2.The cleanliness of the pipe and tube plate is required to be high, so the pipe should be cleaned with lye first and polished to shine.This production of welded pipe equipment is more good.

3.The cleanliness of welded pipe equipment is also required to be high, otherwise there will be air holes.Affect welding quality.

4.The groove of the pipe should be at 1mm, which is the best.