... to Spain, Germany, France, Turkey, USA, Canada, Taiwan, Korea, Vietnam, India , Pakistan, Iran, and so on.Steel pipematerialGB10#,20#,45#,20G.16Mn ... #), Hairline,aid pickling and so onProduction technologySeamless steel pipeWelded steel pipeSurface treatmentPolishing or notThe stainless steel barstandardASTM,GBmaterial201,202,301,304,316,316L ...