Difference of ERW and UOE

Difference of ERW steel pipe and straight seam submerged arc welding (UOE) 

ERW steel pipe:

Because of it compared with submerged arc welding, the welding process ERW process does not add any welding material in the welding process, weld forming without hot melting state, just weld metal after recrystallization process, so the formation of the weld are in complete accord with the chemical composition of a parent metal, steel pipe after annealing treatment after welding, manufacturing molding cold stress, welding stress are improved, so the ERW steel tube has good comprehensive mechanical properties.

UOE steel pipe:

Because it USES cold expanding process after welding tube, so the UOE pipe geometry size accurate, using UOE pipe docking counterpart are of high quality to ensure the welding quality, to a certain extent by the expanding process to eliminate the part of the internal stress. In addition the UOE pipe welding using multi wire welding wire (3, 4), the small welding when the welding line energy, degree of impact on the mother material heat affected zone is small. Multi wire welding wire after the former way wire can have the effect of eliminating stress formed during welding, which improved the mechanical properties of the steel pipe. Parent metal can make steel 100% ultrasonic flaw detection, satisfy the high pressure pipeline to the parent metal

Requirements. Yet despite the UOE pipe comprehensive performance is better than that of other steel tube, but the price, make the cash-strapped customers away.