LSAW Pipe

LSAW (Longitudinally Submerged Arc Welded) steel pipe, also known as straight seam submerged arc welded pipe, is manufactured from hot-rolled steel plates that are formed into a cylindrical shape and welded by double-sided submerged arc welding along a single longitudinal seam. The longitudinal weld seam ensures consistent weld quality and full penetration across the entire pipe length. Compared to spiral welded pipes, LSAW pipes offer superior dimensional accuracy, smaller weld deformation, and more uniform mechanical properties. With excellent resistance to high pressure and harsh conditions, they are the preferred choice for high-grade long-distance oil and gas trunk lines and critical offshore pipeline systems.