... GB 5310-1995, GB 3087-1999, ...Grade: 10#-45#, Mn-V alloy, 15NiCuMoNb5, 16Mn, ...Grade: 10#, 20#, 15MnV, 09Mn2V, ... -secondaryApplication: Structure PipeTechnique: ERWCertification: ISO9001, CESurface Treatment: GalvanizedSpecial Pipe: EMT PipeAlloy Or Not: Non-alloyquality: superior qualityPackaging & ... Material: Q195,Q215,Q235,Q345, GR.A, GR.B, API J55, API K55, 10#,20#, etc.Length: 3-12m or ...