Double-sided submerged arc spiral steel pipe

Double-sided submerged arc spiral steel pipe into the pipe unit, the multi-roll roll, strip gradually rolled up to form a circular gap opening gap, adjust the squeeze roll reduction, so that the weld gap Control in the 1 ~ 3mm, and make the welding flush with both ends. Spiral welded pipe is formed by forming raw materials, steel spiral, through internal and external submerged arc welding, to produce different specifications of the snail