1. Blank preparation.Including the storage of the pipe blank, tube blank view and surface finishing, tube blank blocking and tube blank cold centering.

2. Pipe billet heating.The pipe billet is heated by the annular heating furnace, and the pipe billet is usually sent to the perforation process after being heated.

3. The perforation.Perforation is the threading of a solid pipe blank into a hollow wool pipe.The inner and outer surface quality and wall thickness uniformity of the capillary will directly affect the quality of the product.Therefore, according to the requirements of product skills, considering the possible conditions for the blank, the correct selection of perforation method is very important.The perforated pipe is called a capillary.

4. The pipe mill.Pipe rolling is to thin the perforated capillary wall to achieve the thermal scale and uniformity required by the pipe.Rolling pipe is the primary extension process of pipe making, its shape selection, as well as the reasonable matching of deformation with perforation process, is the key to determine the quality of unit products, output value and technical economic indicators.The pipe after rolling is called dry pipe.

5. Sizing and reducing.Sizing is the post-finishing rolling process of the wool pipe, so that the wool tube can obtain the thermal scale and precision of the outer diameter required by the product pipe.Reducing diameter is to reduce the large pipe diameter to the required standard size and precision, is also the finishing process.In order to reduce the diameter while reducing the wall, it can be reduced under the action of the front and rear tension, namely, tension reduction.After reducing diameter and tension reducing machine generally need to waste pipe reheating.

6. Finishing, viewing, packing and warehousing.