Definition and advantages of hsaw pipe

Helical submerged arc welding (spiral) steel pipe is the full name of hsaw pipe, to the strip into the welded pipe unit, the multi-roll rolling, the strip gradually rolled up to form a circular tube with an open gap, adjust the reduction of squeezing roller so that the weld gap control in 1 ~ 3mm, and make both ends of the weld flush. Spiral welded pipe is formed by forming the material strip spiral molding, through internal and external submerged arc welding, thus producing different specifications of the spiral welded pipe.

Helical submerged arc welding (spiral) steel pipe has many advantages over other welded pipe:
(A)The pipe has two overlapping inner and outer spiral weld, play a role in increasing the rigidity, bearing pressure also increased accordingly.
(B)The use of submerged arc welding process, slag protection effect. Therefore, it has good impact toughness and low temperature performance.

(C)The use of the same width of the strip can produce different diameters and lengths of steel, and straightness good. Easy to adjust, precise size, without sizing and straightening after welding.