... steel seamless pipes GB/Tl4976-02 for liquids, stainless steel seamless pipes GB/T14975-02, ASTM, A269, A312 ... Q390, 10MoVNb, 12CrMo, 15CrMo and 12Cr2Mo; Pipes for oil cracking GB9948-86 of 10, 20, 12CrMo, 15CrMo, 1Cr2Mo ... of 10, 20, Q295, Q345Oil pipes for oil well and hoop pipe API SPEC 5CT of J55 and ... in valves, angle-steel, groove-steel and other well-known profiles, and will provide swift and high ...