... 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 ... stainless steel barstandardASTM,GBmaterial201,202,301,304,316,316L,316LN,317,317L,309,309S,310,310S,430,409specificationRoundSquarerectangle 304l stainless steel tube