... stainless steel pipeSeamless (SMLS) steel Pipe is made from a solid round steel ‘billet’ which is heated and pushed ... or pulled over a form until the steel is shaped into a hollow tube. The seamless pipe is then ... DB685,16Mn,20G,65Mn,510l,ASTMA299,ASTMA515,ASTM A 572,ASTM A 709,ASTMA302,ASTMA537,API X52,API X 42 ... 309S,310,310S,430,409specificationRoundSquarerectangle 304l stainless steel tube