Special shape of steel pipe

Special shape steel pipe which is a kind of economic cross section steel pipe including variable wall thickness, non circular cross section, symmetrical and no-symmetrical section such as square steel tube, rectangular hollow section etc. For the particular condition of use, the special steel pipe is more suitable. Besides it can save raw material, improving the labor productivity of components and parts manufacturing. In automobile, mining machinery, agricultural machinery, construction areas, special shape steel pipe is expansive used. The method of making special pipe is welding, cold drawing which has been more widely used.

A general term of cross section shape steel pipe is special shape square steel pipe with competitive quality. It can be classified into variable diameter seamless steel tube, equal and unequal wall thickness seamless steel pipe on the base of different size of steel tube cross section shape. Comparing with those of circular tube section, in all kinds of parts, tools and machinery parts, we can commonly see the special shape seamless steel pipe and it usually have bigger bending torsional capacity, reducing the structure weight as well as having large moment of inertia and section modulus. Special pipe, which is distinguished to the broken section can be divided into aluminum alloy section tube, plastic tube according to the material. It also has multiple shapes such as oval, triangular, hexagonal and so on.

The forming method is bending which can also be called steel pipe bending forming. The bending of deformed steel tube has two kinds, the one is real bending, the other is empty bending and different methods have different steel pipe prices that will form the different product cost. The real solid curve will be relatively small which is the advantage of rectangular tube bending besides the advantage also includes the production time, roller accuracy and the internal rebound as well. All those can ensure accurate. The instant bending shortcoming is the main stretch of time which will lead to a thin steel tube.

The real bending rectangular tube will lead to the bending line in the direction of the of the length of the deformed steel tube and the metal content will also decrease for stretch. Steel pipe bending line will produce certain compression and the rectangular tube bending of metal will become the thick air bending. These two kinds of production methods including two basic ways. Steel pipe manufacturer should offer high quality products according to the requirements of different customers and should select the appropriate process configuration.