Detail of Straight Seam Steel Pipe

General welded pipe: General welded pipe is used to transport low-pressure fluid. Made of Q195, Q215A, Q235A steel, and Q235B plain carbon. It can also be made of easy-to-weld 0317 standard model 6012 and steel mother 755 mild steel. Steel pipes are subject to hydraulic pressure, bending, flattening and other experiments, and have certain requirements for surface quality. Usually, the delivery length is 4-10m, and delivery of fixed length (or multiple lengths) is often required. The specifications of welded pipes are expressed in nominal diameter (millimeters or inches). The nominal diameter is different from the actual. According to the specified wall thickness, there are two kinds of welded pipes: ordinary steel pipes and thickened steel pipes.

The welding process used in submerged arc welded straight seam steel pipe is submerged arc welding technology, using filler welding and particle-protected flux submerged arc. The diameter of production can reach 1500mm. LSAW is the English abbreviation of submerged arc welded straight seam steel pipe. The production process of submerged arc welded 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 a double weld. The standards that can be implemented are GB/T3091-2008 production standards for low-pressure fluid steel pipes, GB/T9711.1-2-1997 production and use standards for oil and gas steel pipes, and the American API 5L pipeline steel pipe implementation standards. Production materials: Q195A-Q345E; 245R; Q345QA-D; L245-L485; X42-X70. The main pressure-bearing parameters are 2ST/T, 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, and the efficiency has been further improved.