The advantage of this kind of ERW steel pipe processing technology is that there is a heat treatment process after welding, which can eliminate the residual stress of weld and heat affected zone, refine grain, have small heat affected zone of weld and fast heating speed, thus greatly improve the welding speed and welding quality, and can be used as blank without pickling, shot peening and trimming. At the same time, alloy steel, high alloy steel and non-ferrous metal pipe can be welded, which greatly reduces unit power consumption. A set of welding equipment can be used to produce each.


However, for ERW steel tube element, the larger the diameter, the more restricted the weight and wall thickness of the strip. Storage devices are limited by spiral elbows. In addition, the ERW steel tube unit has higher linear velocity and is buried. The speed of arc welded pipe is generally 3 m/min, which does not match each other. Therefore, ERW steel tube unit needs to make full use of and expand its own advantages to improve product quality and develop new products.