Cold drawn shaped pipe technology has shaped steel, welded shaped steel pipes, extrusion shaped steel, hot-rolled steel and other special-shaped, shaped to better adapt to the particularity of the conditions of use, saving and improving labor productivity metal parts manufacturing. Shaped seamless steel tubes are widely used in various structural parts, tools and mechanical parts. And tube compared Pipes generally have a greater moment of inertia and section modulus, flexural torsional greater ability, can greatly reduce the structural weight, saving steel. Pipes are generally based off the cross-section to distinguish, according to the material is divided into seamless steel Pipes, Aluminum Pipes, Plastic Pipes. Pipes can be divided into oval shaped pipe, triangular shaped steel, hexagonal shaped steel, diamond shaped steel, octagonal shaped steel, semi-circular shaped steel circle, equilateral hexagonal shaped pipe, five plum-shaped shaped pipe, double convex shaped pipe, double concave shaped pipe, oval-shaped shaped steel tubes, conical shaped steel, corrugated special steel pipe.