1. The main feature of seamless steel pipe
is that it has no welds and can withstand greater pressure. The product can be a rough cast or cold drawn part.
2. Precision steel pipe
is a product that has appeared in recent years, mainly because the inner hole and outer wall dimensions have strict tolerances and roughness.
Features of cold drawn precision steel pipe: 1). Smaller outer diameter. 2). High precision and small batch production. 3). The cold-drawn finished product has high precision and good surface quality. 4). The horizontal area of steel pipe is more complicated. 5). The performance of the steel pipe is superior, and the metal is denser.
Features of hot rolled precision steel pipe:
Hot-rolled precision steel pipes use continuous casting round tube billet slabs or blooming slabs as raw materials, heated by a walking heating furnace, high-pressure water descaling, and then enter the rough rolling mill, and the rough rolling materials enter the finishing mill after cutting the head, tail, and , Implementation of computer-controlled rolling, after the final rolling, it will go through laminar cooling and coiling by a coiler to become a straight hair coil. The head and tail of straight hair curlers are often tongue-shaped and fish-tail-shaped, with poor thickness and width accuracy, and the edges often have defects such as wave shape, hemming, and tower shape. The coil weight is heavier and the inner diameter of the steel coil is 760mm. After the straight hair coil is processed by a finishing line such as head-cutting, tail-cutting, trimming, and multi-pass straightening and leveling, then it is cut or re-coiled to become: hot-rolled steel plate, flattened hot-rolled steel coil, longitudinal Cut tape and other products. If the hot-rolled finished coil is pickled to remove the oxide scale and coated with oil, it becomes a hot-rolled pickled coil.