HYPNOTIC Video Inside ¦¦ Hot Pipe bending ¦¦ Гибка труб в горячем состоянии

In the hot state, pipes with a diameter of up to 100 mm and more are bent, when there are no special pipe bending mechanical machines for bending in the cold state.

Pipes are hot bent with filler, this process is laborious. River sand sifted through a sieve with holes about 2 mm in size is used as a filler. Too fine sand is unsuitable for bending pipes, since at high temperatures it sinters and burns to the pipe walls. Do not use wet river sand either; moisture, turning into steam when the sand is heated, creates a large pressure inside the pipe, as a result of which plugs clogged at the ends of the pipes can fly out with force and lead to an accident. Therefore, for bending pipes, the sand is first dried, then calcined in furnaces to remove organic impurities and, finally, sieved in drum-type driven screens.