The oldest welding pipe process is bend the material and connect its edges in order to manufacture tube and pipe.
Then the welded pipes process consisted of forging individual metal plates over a mandrel to produce an open-seam pipe, and then heating the mating edges of the open seam and welding them by pressing them together mechanically in a draw bench.
And following the far-reaching developments which have occurred in the energy sector in the last 30 years, and the resultant construction of large-capacity long-distance pipelines, the submerged-arc welding pipes process has gained a position of pre-eminence for the welding of line pipe of diameters upward of approx.
welded pipe manufacturing process main include tow process that pressure welding processes and Fusion welding processes.
The test of Welded Pipes include Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT.
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this article is published by China Welding Pipes manufacturer and supplier – SHENGYI INDUSTRY CO.,LTD.