Special-shaped steel pipe manufacturers include Shanghai Tianyang Steel Pipe Co., Ltd., Shanxi special-shaped steel pipe manufacturer, etc.

Special-shaped seamless steel pipe is a general term for seamless steel pipes with other cross-sectional shapes except round pipes. According to the different cross-sectional shape and size of the steel pipe, it can be divided into special-shaped seamless steel pipes with equal wall thickness (code-named D), special-shaped seamless steel pipes with unequal wall thickness (code-named BD), and variable-diameter special-shaped seamless steel pipes (code-named BJ).

It is an economical cross-section steel pipe. Including non-circular cross-sectional profiles, constant wall thickness, variable wall thickness, variable diameter and wall thickness along the length direction, symmetrical and asymmetrical cross-sections, etc. Such as square, rectangle, cone, trapezoid, spiral, etc.

Special-shaped steel pipes can better adapt to the particularities of use conditions, save metal and improve labor productivity in parts manufacturing. It is widely used in aviation, automobiles, shipbuilding, mining machinery, agricultural machinery, construction, textiles and boiler manufacturing. Methods for producing special-shaped pipes include cold drawing, electric welding, extrusion, hot rolling, etc. Among them, the cold drawing method has been widely used.