Seamless pipe mills introduce oil cracking pipes to furnace pipes, heat exchanger pipes and seamless pipes for petroleum refining plants. Commonly used high-quality carbon steel (10,20), alloy steel (12CrMo, 15CrMo), heat-resistant steel (12Cr2Mo, 15Cr5Mo), stainless steel (1Cr18Ni9, 1Cr18Ni9Ti) manufacturing. In addition to the chemical composition and various mechanical properties of the steel pipe, it is also necessary to ensure that the water pressure, flattening, flaring and other tests, as well as the surface quality and non-destructive testing. Steel pipes are delivered under heat treatment. Learn more about pipe related knowledge, go to http://?id=3