It is impossible to bend a thick-walled large-diameter pipe with a manual pipe bender. This is done in another accessible way. It is suitable in cases where the pipe will not be used for a gas pipeline or water supply, but only as a load-bearing structure.
What you need:
- welding machine;
Pipe bending process
A rectangle is cut out of paper, the length of which is equal to the circumference of the pipe, and its width is two diameters. It folds in half. A line is drawn at the bend, parallels are also drawn on the left and right with an indent of 1 cm.
The sheet is wrapped around the pipe with lines outward, and its edges are connected with tape. Then the pipe is drawn around its edges. Labels are placed on it along the lateral parallels and the sheet joint line. These points are connected.
Along the lines, you need to put transverse marks with a step of 5 mm. Circles are drawn along them. The space between the parallels is left clear.
A cut is made along each circle with a grinder.
After that, the pipe can bend, depending on the section of the grinder’s disc, up to 45 °. To bend it even more, you need to remove the centers of the strips one by one.
The side parts remaining from them should be pressed into the pipe. After that, she will bend at a right angle.
Further along the bend, several longitudinal welds are applied.
Grinding the seams.
Everything is cleaned and putty.
The resulting knee will look perfect after painting.
Watch the video