Factory direct sales: manufacturers direct delivery, no intermediate links to earn the price difference, save money and worry. Advanced equipment: cutting according to customer requirements, size precision error is small, rich experience. After sale worry-free: our steel is guaranteed quality and quantity, products in accordance with national standards. Strength manufacturers: have their own factory workshop equipment, inexpensive, quality assurance. Strict quality inspection: support material detection, through multiple channels; Strict quality control process, rest assured to use.Shandong Zhongao Steel Co. LTD. to provide you with assured products. Professional production and sales: seamless pipe, flat steel, channel steel, galvanized pipe, square pipe, I-beam, welded pipe, shelf pipe, Angle steel, spiral pipe and other products.Steel pipe shaped pipe can be divided into oval shaped steel pipe, triangular shaped steel pipe, hexagonal shaped steel pipe, diamond shaped steel pipe, octagonal shaped steel pipe, semicircular shaped steel pipe, unequal hexagonal shaped steel pipe, five valve plum shaped steel pipe, double convex shaped steel pipe, double concave shaped steel pipe, melon shaped shaped steel pipe, conical shaped steel pipe, corrugated shaped steel pipe.Special-shaped seamless steel pipe is widely used in various structural parts, tools and mechanical parts. Compared with the round tube, the special-shaped tube generally has a larger moment of inertia and section modulus, a larger bending and torsional resistance, can greatly reduce the weight of the structure, save steel.