1. The main feature of seamless steel pipe is that it has no welded joints and can withstand greater pressure. The product can be very rough castings or cold-drawn parts.

2. Precision steel pipe is a product that has appeared in recent years, mainly due to strict dimensional tolerances and roughness of the inner hole and outer wall.

The characteristics of cold-drawn precision steel pipe :1) The outer diameter is small. High precision can be done in small batches. High precision cold drawing finished products, good surface quality. The transverse area of the steel pipe is more complex. 5) Steel pipe performance is better, the metal is denser.

The difference after hot rolled precision steel pipe

Hot rolled precision steel pipes are made of continuous casting round tube billet or first rolled steel billet as raw material, heated by stepping furnace, descaled by high pressure water into roughing mill, roughing mill cutting head, tail and finishing mill control rolling, and finally rolled into straight coils by laminar cooling and rolling mill. The head and tail of the straight hair curl are often tongue and fishtail, the thickness and width accuracy are poor, and the edge often has defects such as wave shape, fold edge and tower shape. The coil weight is heavy, the inner diameter of the steel coil is 760mm. After cutting the end, trimming, straightening, leveling and other fine line treatment, and then cutting plate or rewinding, it becomes hot rolled steel plate, flat hot rolled steel coil, longitudinal cutting strip and other products.