... , gr122. Standard: ASTM b337, ASTM b338, ASTM b8613. Production description:1) size: Outer diameter: 3-300mm2) shape: Round, square3) length: <=6000mm4 ... , architectural, automotive, biomedical, chemical processing, marine, military, oil, tooling, racing.(1)heat exchangers and condensers(2) all kinds of corrosive fluid transmission ...