Brand Name: Ark Steel Place of Origin: China Model Number: ASTM A556 / ASME SA556 Steel Grade: 300 Series Application: Boiler/ heat exchanger Certification: ISO Welding Line Type: Seamless/Welded Shape: Round Pipe Tube Outside Diameter: 3.0-608mm Wall Thickness: 0.05-120mm Length: Customers' Requirement Payment Term: T/T Price term: FOB CIF CFR Market: Global Package Wooden cases with the water-proof package, etc. Process Method Cold drawn Surface treatment AP, BA, Polished, according to the customer's requirements.