The difference between precision steel pipe and seamless steel pipe

1. The main feature of seamless steel pipe is that it has no welded seams and can withstand greater pressure. Products can be very rough as-cast or cold drawn.

2. Precision steel pipes are products that have 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). The outer diameter is smaller.

2). High precision and 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 complicated.

5). The performance of the steel pipe is better and the metal is denser.

The difference after hot-rolled precision steel pipe

The hot-rolled precision steel pipe is made of continuous casting round tube billet slab or pre-rolled slab as raw material, heated in a walking furnace, descaled by high-pressure water, and then enters the rough rolling mill. , implement computer-controlled rolling, and after final rolling, it is coiled by laminar flow cooling and coiling machine to become straight hair rolls. The head and tail of the straight hair curler are often tongue-shaped and fish-tail-shaped, with poor thickness and width accuracy, and the edges often have defects such as wave shape, folded edge, 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 cutting head, tail cutting, edge trimming and multi-pass straightening, leveling and other finishing lines, it is then cut or re-coiled to become: hot-rolled steel plate, flat hot-rolled steel coil, longitudinal Tape and other products. If the hot-rolled finishing coil is pickled to remove the oxide scale and oiled, it becomes a hot-rolled acid-washed coil.

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Production of seamless steel pipes

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