LSAW Steel Pipe

The product investigated in this EPD is the LSAW steel pipe manufactured by TianJin HuiLai International Trade Co., Ltd at the company’s plant located in China. The materials used in the production are steel, solder wire, and scaling powder. According to the manufacturer, the steel used in the product is manufactured through EAF route.

The welding process of submerged arc welded straight seam steel pipe is submerged arc welding technology, which uses filler welding and particle shielded flux submerged arc welding. LSAW is the abbreviation of submerged arc welding straight seam steel pipe. The production process of submerged arc welding straight seam steel pipe includes JCOE forming technology and roll forming submerged arc welding technology. When the diameter is large, two steel plates may be used for rolling, which will form the phenomenon of double welds.

Applicable standards: EN10210/EN10219,GB/T3091, GB/T9711.1-2-1997 material: S355J0H, S355J2H, L245-L485. The pressure parameters mainly include 2ST/T, where S is the yield strength, and T is the wall thickness. Submerged arc welding has developed into double-wire submerged arc welding and multi-wire submerged arc welding, with further improvement in efficiency.