bright steel welded pipe 1.material:300 series 2.standard:GBI9001 3.O.D:3/8"-16" 4.W.T:SCH10S-SCH80S bright steel welded pipe,bright steel pipe,bright welded pipe1.standard:GBI9001,GB/T18705-20022.certification:ISO90013.material:304,3164.O.D:16mm,18mm,19mm,22mm,25mm,28mm,32mm,34mm,38mm,39mm,45mm,48mm,51mm,54mm,57mm,60mm,63mm,70mm,76mm,85mm,89mm,101.6mm,104mm,108mm,114mm,and 114mm-219mm ...