LSAW (Longitudinal Submerged Arc Welded)
/glossary/lsawPipe with straight longitudinal weld made by submerged arc welding of formed plate.
In detail
Longitudinal Submerged Arc Welded (LSAW) pipe is manufactured by forming steel plate into a cylinder and welding the longitudinal seam using submerged arc welding (SAW). Unlike HSAW, the weld runs straight along the pipe length, providing uniform stress distribution for high-pressure service. LSAW pipes range from 400 mm to 1600 mm OD with wall thicknesses up to 40 mm. They are specified for oil and gas transmission, high-pressure water lines, and structural piles where integrity is critical.
Where you'll meet this in procurement
You will meet LSAW (Longitudinal Submerged Arc Welded) when choosing process route and product family. Match LSAW (Longitudinal Submerged Arc Welded) to pressure, temperature, corrosion duty, and standard (IS, ASTM, ASME, or API) so the mill route and documentation line up with the application.