sanitary welded pipes and tubes 1.OD:16mm-219mm 2.WT:0.8mm-3. ... :304,304L,306,306L 4.type:welde sanitary welded pipes and tubes,sanitary welded pipes,sanitary welded tubes1.standard:GB/T18705-20022.Sizes ... ,85mm,89mm,101.6mm,104mm,108mm,and 114mm to 219mm3.Surface finish: blank,black, bright and galvanized4.Longth of each pipe:6m ...