What Are The Manufacturing Methods For Line Pipe?

Line pipe can be manufactured in two main ways: seamless steel pipe (SMLS) and welded steel pipe (Welded). Welded steel pipes are divided into resistance welding (ERW/HFW) and submerged arc welding (SAW), and the latter is further divided into longitudinal submerged arc welding (LSAW) and spiral submerged arc welding (SSAW).