Which way of bending pipes is the most economical

question:

There was a one-time need to bend the pipe in diameter 34 mm and with a wall thickness 2 mm in a semicircular segment with a radius of curvature 1100 mm. How to do it cheaply and correctly?

reply:

The cheapest way would be to bend such a pipe on a wooden template. To do this, make a template (it is possible from a chipboard) with a radius of curvature 1000 mm. Take the pipe longer, than you really need, fix one end of the pipe in any convenient way, and other firesє pattern. Cut off the extra ends of the pipe after bending. A template with a smaller rounding radius is therefore necessary, that the residual stresses in the pipe will slightly unbend it after bending the pattern.