Steel pipe is a hollow strip of steel that is used extensively for transporting fluids such as oil, gas,
Water, gas, steam, etc., in addition, in bending, torsional strength at the same time, lighter weight, so it is also widely used
To manufacture mechanical parts and engineering structures. Also commonly used for the production of conventional weapons, gun barrels, shells and so on.
Classification of steel tubes: steel tubes are divided into seamless steel tubes and welded steel tubes (with crimson tube). According to the section shape and
Can be divided into round pipe and special-shaped pipe, widely used is round steel pipe, but there are some square, rectangular, semicircle,
Hexagonal, equilateral triangle, octagonal and other special-shaped steel pipes