The Making Method of Bend Pipe in Pressure Vessel

Manual bend
Manual bending does not need special equipment and complex process equipment, it can bend all kinds of radius, angle and space to the bend. But this way of bending the labor intensity, low productivity, quality is not stable enough.
Manual bending steel pipe is mostly hot bending, for stainless steel and non-ferrous metals should be cold bending.
Before bending, the pipe is filled with filler, which is generally pure and dry sand. Stainless steel and non-ferrous metal fillers should use rosin, lead and other low melting point substances to prevent wrinkles and reduce ovality. Bend with die
This type of pipe bender uses die bending. The main mold has two kinds of disc-shaped groove wheel and horn core head.
When bending a pipe with a disc-shaped grooved wheel, the bending die is on the outside of the pipe, half of the pipe lies in the groove, and the other half of the pipe in the bending area is pressed by a small roller with a groove (also called a pressure roller).
The end of the pipe is fixed on the disc-shaped bending die by the chuck. If the pressure roller does not move, the disc-shaped bending die will actively rotate to complete the bending, which is called the pull bending type;
If the tube is pushed to make the disc-shaped bending die rotate to complete the bending, it is called push-bending type;