The knowledge of precision steel pipe and the difference between seamless steel pipe

Precision steel pipe is a kind of high-precision steel pipe material processed by cold drawing or hot rolling. Due to the fact that the inner and outer walls of the precision steel pipe are free of oxide layers, withstand high pressure, no leakage, high precision, high gloss, no deformation due to cold bending, no flaring, no flat cracks, etc., they are mainly used for the production of pneumatic or hydraulic components such as cylinders or The cylinder can be seamless or welded. The chemical composition of precision steel tubes is carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, and chromium Cr.
The difference between precision steel pipe and seamless steel pipe 1. The main feature of seamless steel pipe is that it has no welding seam and can withstand greater pressure. The product can be very rough cast or cold dial. 2. Precise steel pipe is a product that has emerged in recent years. It mainly has strict tolerances and roughness on the inner hole and outer wall dimensions.
Characteristics of cold drawn precision steel pipe 1. Smaller outside diameter. 2. High precision can be done in small batches. 3. Cold drawn high precision of the finished product, good surface quality. 4. The transverse area of ​​the steel tube is more complicated. 5. The steel pipe has better performance and the metal is denser.
Differences between hot-rolled precision steel tubes The hot-rolled precision steel tubes are made of continuous-cast round billet blanks or green rolled slabs. They are heated in a step-type heating furnace, descaled after high-pressure water, and then passed into the roughing mill. , tail, and then into the finishing mill, the implementation of computer-controlled rolling, after the final rolling after laminar cooling and coiler coiling, a straight hair roll. The heads and tails of straight hair curls tend to be tongue-shaped and fish-tailed. The accuracy of thickness and width is poor, and there are often defects such as wave-shaped, folded edges, and tower-shaped edges. Its heavier roll weight and coil inner diameter is 760mm. After straightening the hair through the cutting line, cutting tail, trimming and multi-pass straightening, leveling and other finishing lines, and then cutting or re-rolling, it becomes: hot-rolled steel plate, flat hot-rolled steel coil, vertical Cut and other products. Hot rolled finishing rolls, after pickling to remove oxide scales and oiling them, are hot rolled pickled coils.
This information is shared by 51 steel pipe network.

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