1/2'' -14" carbon Cold drawn seamless steel pipe ... .B, O.D.: 13.7-355mm W.T.: 2-30mm length:7-9m rand StandardASTM, BS, JIS, ... A53-A369,DIN ST35-ST52, BS 1387O.D.1/4"--30",samll diameter OD:13.7-141mmW.T ... ,Electricity,Machine building industy,Chemical industy,Petroleum,Traffic.Tolerance OD :+1% / -1% WT: +12.5% / -10% Main marketAsia, India, ... 20~0.551.20~1.60≤0.035≤0.035≤0.25≤0.25/≤0.25 1/2'' -14" carbon ...