ERW Pipe - Electric Resistance Welded Pipe

Straight seam steel pipe thermal expansion

 

Thermal expansion of straight seam steel pipe refers to technology through expanded diameter straight seam steel pipe based on the need to expand the reach customers use. Straight seam steel pipe with a diameter of two processes sided submerged arc welding and high-frequency welding, double-sided submerged arc welding straight seam steel pipe up to about 1500, we are talking Flaring mainly refers to the high-frequency welded pipe, there are two points the first high-frequency welded pipe production caliber is relatively small, so to expand. The second is the mechanical properties of high-frequency welded in all respects better than the submerged arc welding and the welding is a fusion of fluid through the tubular body itself, instead of through the wire, the possibility of cracking in the process of thermal expansion is small. Thermal expansion of straight seam steel pipe standard GB/T3091-2008, GB/T9711-2008. [1]