... : JINCHUANGModel Number: 13Type: WeldedSteel Grade: 300 SeriesApplication: industrial,Certification: ISOWelding Line Type: ERWThickness: SCH5S-SCH40SOuter Diameter: 1/2 ... Standard:GB,JIS,DIN,ASTM A312,ASTMA269,ASTM268/268M2.Certification:ISO90013.Material:304,304L,316,316L4.O.D:, ... company has gained the ISO9001:2008 and the Lloyd PED Certification and has been strictly conforming to the requirements of ...