Seamless steel pipe is widely used. General purpose seamless steel tubes are rolled from ordinary carbon structural steels, low alloy structural steels or alloy structural steels with the highest yield, and are mainly used as pipes or structural parts for conveying fluids. .2, depending on the use of three different types of supply: a, according to chemical composition and mechanical properties of the supply; b, according to the mechanical performance of the supply; c, according to the water pressure test supply. Pipes supplied by Types a and b, if used to withstand liquid pressure, are also subject to hydrostatic testing. 3. The special-purpose seamless pipes include seamless pipes for boilers, chemical power, seamless pipes for geological use and seamless pipes for petroleum.
Seamless steel tubes have a hollow cross-section and are used in large quantities as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, steel pipes have a lighter weight when subjected to the same flexural and torsional strength and are economical cross-section steels.
Widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle frame, and steel scaffolding used in construction, etc. The manufacture of ring-shaped parts using steel pipes can increase the material utilization, simplify the manufacturing process, save materials and processing Working hours have been extensively manufactured with steel pipes.