Why are the pipes for industrial boilers all seamless steel tubes?

The pipes for industrial boilers are mainly seamless steel pipes, because the performance indexes of seamless steel pipes can fully meet the requirements of boiler applications. Although the cost is high, its safety and reliability are high. The high-temperature and high-pressure equipment of industrial boilers must use seamless steel tubes, and the thickness of the tube wall also increases accordingly.

Welded steel pipes are now used in low-pressure boilers, thanks to the rapid improvement of welding technology. For example, the pipe joint friction welded steel pipe has no difference in the micro-structure of the joint, and after the tube cluster seam is remelted through butt joint and corner joint, it is difficult to observe the trace of the cluster seam with the naked eye. The micro-structure of its part is exactly the same as that of the clump.