The manufacturing process of steel pipe:

(1) pull the dial; which Is already rolled metal billet (type, pipe, products, etc.) through the die hole to pull the section to reduce the length of the increase of processing method mostly used for cold processing.

(2) forging; A pressure process that uses the reciprocating force of the hammer or the pressure of the press to change the blank into the desired shape and size. Generally divided into free forging and die forging, commonly used for the production of the large profile, blank and other sections of the size of the steel pipe larger material.

(3) extrusion; the steel pipe will be placed in a closed extrusion Jane, one end of the pressure, so that the metal from the specified die hole extrusion and have the same shape and size as the finished product processing method, mostly used in the production of non-ferrous metal steel pipe.

(4) rolling; The steel pipe metal blank passes through the gap of a pair of rotating rollers (of various shapes), and the section of the material is reduced and the length is increased due to the compression of the roller. This is a commonly used production method of steel pipe, which is mainly used to produce steel pipe profiles, plates, and pipes. Divided cold rolling, hot rolling.

The quality of the steel pipe is not only related to its service life but also related to its use rate. When we buy steel pipe, we can distinguish the quality of the steel pipe by its appearance. If the surface of the steel pipe is pockmarked and not smooth, then the quality of the steel pipe is relatively poor. And pay attention to observe whether there are scratches or cracks on the surface of the steel pipe when choosing, if there is such a case, then the steel pipe is the corresponding inferior product. And shoddy steel pipes do not have a metallic luster, its color will be light red or similar to pig iron color. Secondly, we can also look at the cross-section of the steel pipe. If the cross-section is uneven, it is in the inferior steel pipe.

Cangzhou Shenlong Pipe mainly produces seamless steel pipe, straight seam steel pipe, and spiral steel pipe, but also can process galvanized, anti-corrosion coating, has more than 20 years of production history, reliable quality, is a qualified supplier of BP oil, PetroChina.