PSL Limited manufactures Steel Pipes with Diameter 406 to 3175 mm. PSL Limited, an ISO 9001:2000 & ISO 14001:2004 certified company also manufactures various types of steel pipes, pipe mills and machinery as well as anticorrosive coating of steel pipes. The Steel Pipes with Diameter 406 to 3175 mm has wall thickness up to 25 mm. The Steel Pipes with Diameter 406 to 3175 mm has length up to 12.5 meter. These pipes are spiral welded. After spiral welding, these pipes are discharged from the Spiral mill for processing of the pipe ends.