ms erw pipe 1.Certification:BSI 2.OD:20mm-325mm 3. ... .Material:Q195,Q235,Q345 etc ms erw pipe1.Application of ms erw pipe:structure pipe2.OD of ms erw pipes:21.3mm -219 ... ,Q235,Q345,carbon steel pipeerw steel pipems erw pipems pipe ms erw pipeO.DO.D toleranceW.TThickness Tolerance20M--325MM±0.10 ...