HSAW (Helical Submerged Arc Welded)
/glossary/hsawSpiral-welded pipe formed by helical winding of steel coil with submerged arc welding.
In detail
Helical Submerged Arc Welded (HSAW) or Spiral SAW pipe is manufactured by forming steel coil into a helical (spiral) cylinder and welding the seam using submerged arc welding. The spiral weld allows efficient production of large-diameter pipes (400 mm to 3000 mm+) from narrow coil. HSAW pipes are economical for water transmission, piling, and low-pressure applications, though the helical weld seam limits them to lower pressure classes compared to LSAW. IS 3589 and API 5L govern large-diameter HSAW pipes.
Where you'll meet this in procurement
You will meet HSAW (Helical Submerged Arc Welded) when choosing process route and product family. Match HSAW (Helical 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.