Seamless steel pipe is a kind of hollow section, and the peripheral no joint circular, square, rectangular steel. Seamless steel pipe is to use steel ingot or solid shell made by perforation capillary and then by hot rolling and cold rolling or cold made dial. Seamless steel pipe is hollow section, a large number of used for conveying fluid pipe, steel pipe and round steel and solid steel, compared to the bending torsional strength phase at the same time, the weight is light, it is a kind of economic cross section steel, widely used in the manufacture of structure and mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle frame and construction of steel used in construction scaffolding, etc.http://www.steeltube-china.com htp://www.dagangpipe.com
