Stainless steel has good comprehensive performance and good appearance surface characteristics, and is widely used in all walks of life. Similarly, stainless steel pipes are no exception. Stainless steel pipe is a kind of steel with a hollow cross-section, generally divided into stainless steel seamless pipe and welded pipe. So what's the difference between these two kinds of tubes?

1, the molding process is different

Welded pipes are made by rolling steel plates or strips through molds and sets into pipe shapes, and then using a welding process, the edges are welded together to form pipes. The seamless pipe is made by heating the billet to a high temperature and then directly into the pipe through a process such as perforation and rolling, without welding.

2. Internal structure

Due to different production processes, welded pipes and seamless pipes have differences in the internal structure, and the weld of the welded pipe will form a connection line inside the pipe, which may have a certain impact in some special occasions. The seamless pipe has a more uniform internal structure because it has no weld, which is conducive to the transmission of fluid and the reduction of resistance.

3. Performance characteristics

The strength and pressure resistance of welded pipe are relatively low due to the thermal effect and the presence of weld during welding. The seamless pipe has high strength and pressure resistance due to the absence of welding seams in the manufacturing process, and is usually used in occasions with high requirements for strength and sealing.

4. Scope of application

Welded pipe is usually suitable for low pressure fluid transport, as decorative pipe, product pipe, semiconductor and so on. The seamless pipe is suitable for working conditions under high pressure, high temperature and special environment due to its high strength and pressure resistance. For example, oil, gas, chemical and other industries. However, with the continuous updating and optimization of industrial welded pipe manufacturing processes, welded pipes have replaced seamless pipes in many fields.

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