Seamless steel pipe is perforated by the whole round steel, the surface of the steel pipe without weld, called seamless steel pipe.
Seamless steel pipe with hollow section, a large number of used for conveying fluid pipeline, such as conveying oil, natural gas,gas, water and some solid material pipeline. Compared with solid steel such as round steel, steel tube has the same bending and
torsional strength and lighter weight, so it is a kind of economic section steel.