Q355 seamless steel pipe

Q355 seamless steel pipe

　　Seamless steel pipe is widely used.

　　1. General purpose seamless steel pipe is rolled by ordinary carbon structural steel, low alloy structural steel or alloy structural steel, with the largest output. It is mainly used as pipeline or structural parts for conveying fluid.

　　2. There are three types of supply according to different purposes:

　　a. Supply according to chemical composition and mechanical properties;

　　b. Supply according to mechanical properties;

　　c. Supplied as per hydrostatic test. If the steel pipe supplied according to class A and B is used to bear liquid pressure, it shall also be subject to hydrostatic test.

　　3. Seamless pipes for special purposes include seamless pipes for boilers, chemical and electric power, seamless steel pipes for geology and seamless pipes for petroleum.

　　Seamless steel pipe has hollow section and is widely used as pipeline for conveying fluid, such as pipeline for conveying oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe has the same flexural and torsional strength and lighter weight. It is an economic section steel.

　　It is widely used to manufacture structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffold used in construction. It can improve material utilization, simplify manufacturing process, save materials and processing hours. It has been widely manufactured with steel pipe.