Seamless steel billet piercing is the production of steel products, so there is no presence of welds on the pipe, welded pipe prices compared to some high. Seamless pipe widely used. So how do you distinguish it welded tube and seamless tubes, welded steel pipes in appearance generally has a straight or spiral weld, and seamless pipe production process will be carried out at high temperatures, so the general was red-brown.

Also welded steel with steel or steel production, so it's uniform wall thickness, and there will be partial wall phenomenon. In fact, the use of seamless tube is a steel tube welded pipe reprocessing of production, it is not only close to the appearance of seamless steel tubes, and its mechanical properties are close to seamless pipe, of which future will be good alternative products. Micro-structure is welded tubing thermal expansion further processing, it is close to the weld base metal product prices were lower than seamless pipe, therefore the domestic market in recent years the widespread popularity. Different seamless tube and welded piping is mainly different molding process.

Ordinary steel, such as water tubing, usually after a flat plate by welding together by folding, you can find a seam in the above; diameter spiral weld is generally thicker.

The seamless steel pipe is generally the molten state through an annular slit backlog stretching out after the treatment process by forming, so there is no seam. In performance, seamless steel pipe, especially compared with ordinary steel has greatly improved the bearing capacity, it is often being used for high-voltage equipment.

Hydraulic equipment such as piping connections. While the ordinary steel tube weld area is its weak link, weld quality is also a major factor in its overall performance impact. People who lived in the north generally have had water pipes or heating piping burst in the winter cold experience explosive place are generally weld. Seamless pipe production process is mainly accomplished by reducing the tension, the diameter of the rolling process is a continuous process of reducing tension hollow base material without mandrel.

In ensuring the quality of the premise of the mother pipeline welding, pipe tension reducing the overall process is the pipe is heated to 950 degrees Celsius, and then stretch reducing mill (tension reducing Machine has 24 times) rolled into a variety of outside diameter and wall thickness of the finished tube produced using this process with the ordinary hot-rolled steel are essentially different frequency welded tube through the furnace after the micro-structure and mechanical properties of heating the weld and the parent can reach exactly the same addition, through multi-channel times of tension reducer rolling steel and automatic control makes the dimensional accuracy (especially the tube wall thickness and roundness accuracy) than similar seamless.

Developed countries produced fluid pipe, boiler tubes have been widely adopted in the process seamless pipe, with the development of society, domestic hot-rolled seamless pipe gradually replace the situation has been formed.

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