Standard fluid pipes

　　Chinese standard GB/T8163.which is equal to API or ASTM. Mainly Application: Conveying water,gas oil and other fluids.Material grade: 10#, 20#,A106/A53 GrB, Api5l Grb.Chemical composition and mechanical properties：

Standard Steel grade Chemical constituents (%) C Mn Si Cr Ni Cu P.S GB/T8163 10 0.07～0.13 0.35～0.65 0.17～0.37 ≤ 0.15 ≤ 0.30 ≤ 0.25 ≤ 0.030 20 0.17～0.23 0.35～0.65 0.17～0.37 ≤ 0.25 ≤ 0.25 ≤ 0.25 ≤ 0.030 Q345 0.12～0.20 1.20～1.60 0.20～0.55 　 　 　 ≤ 0.030 Mechanical properties Tensile strength (MPa) Yield strength (MPa) Elongation(%) 10 335～475 ≥ 205 ≥ 24 20 410～550 ≥ 245 ≥ 20 Q345 490～665 ≥ 325 ≥ 21