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CREDIT STEEL INDUSTRIAL has 4 factorys, which located in Tianjin city and Heibei province, boasts its more than 500 staffs; professional technicians more than 100 people; owned 12 advanced production lines, full of inspection equipments and supporting energy saving facilities.
Large diameter spiral steel pipe production process: the spiral seam steel pipe is made of steel coiled plate as the raw material, often hot extruded, welded by the automatic double-wire double-sided submerged arc welding process.
The straight seam welded pipe production process is simple, high production efficiency, low cost, and rapid development.
Welded steel saw spiral pipe adopts double-sided submerged arc spiral welding technology, which is continuous welding of narrow strip (plate) coil.
