1. The main feature of seamless steel pipe is that it has no welding seams and can withstand greater pressure. Products can be very rough as cast or cold drawn parts.
2. Precision steel pipe is a product that has appeared in recent years. It mainly has strict tolerances and roughness in the dimensions of the inner hole and outer wall.
Features of cold drawn precision steel pipe: 1). Smaller outer diameter. 2). High precision and can be used for small batch production. 3). The cold-drawn finished product has high precision and good surface quality. 4).The cross-sectional area of the steel pipe is more complex. 5). The performance of steel pipe is superior and the metal is denser.
The difference between hot-rolled precision steel pipes
Hot-rolled precision steel pipes use continuous cast round tube slabs or rough-rolled slabs as raw materials. They are heated by a walking heating furnace and descaled with high-pressure water before entering the rough rolling mill. The rough rolled material is cut into head and tail and then enters the finishing mill. , computer-controlled rolling is implemented. After the final rolling, it undergoes laminar cooling and coiling by a coiler to become straight coils. The head and tail of straight hair rolls are often tongue-shaped and fish-tail-shaped, with poor thickness and width accuracy, and the edges often have defects such as wavy shapes, folded edges, and tower shapes. The coil weight is heavier and the inner diameter of the steel coil is 760mm. After the straight coils are processed by head cutting, tail cutting, edge trimming and multi-pass straightening, leveling and other finishing lines, they are then cut into plates or re-rolled to become: hot-rolled steel plates, flat hot-rolled steel coils, longitudinal steel coils, etc. Cutting tape and other products. If the hot-rolled finished coils are pickled to remove scale and oiled, they become hot-rolled pickled coils.
