Seamless hollow section tube

In the current steel pipe market, whether to use a seamless or welded steel pipe depends principally on the wall thickness, diameter ratio and the specified pipe tolerances. As a rule, seamless steel pipe is manufactured based on the diameter or the ration of diameter to wall thickness. The normal raw material is a round spool section preheated in a rotary furnace, or for larger diameters a hollow section preshaped in a perforation press, which is then prerolled in a rotary rolling mill. In the manufacturing of longitudinally welded steel pipes, either individual steel plates or coils are used as raw material. And welded pipes are produced in a series of different, sequenced process stages, including cold forming, welding, heat treatment, calibration and non-destructive testing.

Generally speaking, the condition of the surface of seamless pipes is usually determined by the hot forming, while the manufacturing process for welded pipes allows for a wide variety of surface types in the raw material (e.g. cold rolled). In addition, a further enhancement of the surface condition can be achieved by supplementary processing of the pipe, including grinding the pipe surface. In that regard, on the whole, the seamless pipe has relatively high steel pipe price in comparison with welded steel pipe due to the high costs of pipe manufacturing in a mill. Besides, the surface of the welded steel pipe is able to be checked out before they are released for sale to ensure they are going to work out for your needs. This is something which is not available with the seamless options.

In our actual applications, seamless steel pipe has the distinct advantage of no welding seam in the base pipe, which is usually viewed as a weak spot, vulnerable to failure and corrosion. Seamless steel pipe tends towards round steel pipe or oval shape in the steel pipe market. It is widely used in construction field today. Furthermore, when you consider cost-effectiveness, seamless pipes have the distinct advantage of small and medium-sized outside diameters with higher wall thicknesses. However, thickness in welded pipe tends to have more consistent wall thickness when compared to the seamless options.

DongPengBoDa Steel Pipe Group is a professional Tianjin steel pipe manufacturer in China. We are committed to producing various types of steel pipes based on your project in the market. If you have any further question, please contact us at your convenience.