Standard: BS 1387, BS 1139, BS 6363, JIS G3101, JIS G3466, GB/T8163, GB/T3901 Grade: 10#-45#, 16Mn, A53-A369, ST35-ST52, Q195-Q345 Grade: 10#, 20#, 45#, 16Mn, A53(A,B), A106(B,C), St37, St52, St42, St45, Q235, Q345, Q195, Q215 Thickness: 0.5 - 30 mm Section Shape: Round Outer Diameter: 21.3 - 323.9 mm Place of Origin: Tianjin, China (Mainland) Secondary Or Not: Non-secondary Application: Fluid Pipe Technique: ERW Certification: ISO9001-2000,BV,SGS Surface Treatment: Galvanized Special Pipe: API Pipe Alloy Or Not: Non-alloy zinc coating: 200-400g/m2 Material: Q195 Q215 Q235 Q345 Special Pipe: Thick Wall Pipe End protector: Plastic pipe cap,Iron protector