... facilities, stainless steel seamless pipes GBl3296-9l for boiler and heat exchanger, stainless steel seamless ... Q345, Q390, 10MoVNb, 12CrMo, 15CrMo and 12Cr2Mo; Pipes for oil cracking GB9948-86 of 10, 20, 12CrMo, 15CrMo, ... 1999 of 10, 20, Q295, Q345Oil pipes for oil well and hoop pipe API SPEC 5CT of J55 ... valves, angle-steel, groove-steel and other well-known profiles, and will provide swift and high ...