1, hot spinning method
        It is the plate blank or pre blank forming is fixed to the rotating core rod and the pressure with the rotary wheel blank, wheel rotation and axial feeding, after one or multiple processing and processing method for various hollow thin-wall revolving products. The utility model has the advantages of high product precision, good mechanical performance and wide size range. Tool mold is simple, easy to replace, production cost is lower than other methods. The main disadvantage is that the production time is long, the output is low, and the length of the pipe is limited by the length of the equipment, and the size is short.
        2, hot extrusion method
        Before extrusion, the billet is need to be processed, and the equipment is small, the material is waste, and the technology is more mature when the pipe fittings with less than 100mm diameter are pressed. But once the pipe diameter increases, the use of hot extrusion method requires large tonnage and large power equipment, the corresponding control system to upgrade.
        3, hot rolling method
        Hot rolling with longitudinal and cross rolling. Longitudinal rolling elongation rolling main Co. mandrel pipe mill rolling, fewer stand mandrel mandrel pipe mill rolling, and limit moving mandrel continuous tube rolling and floating mandrel pipe mill. These methods are of high production efficiency, low metal consumption, good product quality, advanced control system, more and more extensive application. The rolling method with low investment, short process, suitable for small batch, multi variety, multi specification and high precision, the production of thick wall seamless pipe has been widely used.