LSAW Steel Pipe Is A Single Plate As Raw Material

  LSAW steel pipe is a professional expression term for straight seam submerged arc welded steel pipe. LSAW steel pipe is a single plate as raw material, the steel plate in the mold or molding machine in the pressure (volume) into a tube, the use of double-sided submerged arc welding and expansion from the production. Its finished product range is wide, the toughness, plasticity, uniformity and compactness of the weld are better, and it has the advantages of large diameter, thick wall, high pressure resistance and low corrosion resistance. In the construction of high-strength, high-quality long-distance oil and gas pipelines, the required steel pipe is mostly large diameter thick-walled submerged arc welded pipe. According to the API standard, in the large oil and gas transmission pipeline, when through the alpine zone, the seabed, the urban population density area 1 class, 2 type area, straight seam submerged arc welded pipe is the only designated tube type.

  According to the different molding methods can be divided into:

  UOE steel pipe: single sheet in the edge of the pre-bending, the U molding, O molding, welding, external welding, mechanical cold expansion and other processes.

  JCOE steel pipe: that is, according to "J-C-O-E" pre-welding, forming, after welding by cold expansion process

  HME steel pipe: by the mandrel rolling method according to "C-C-O" molding, after welding by cold expansion and other processes.