the method of the present invention comprises providing a pipe made of a metallic material selected form the group consisting of carbon steel copper and its alloys stainless steel low alloy steel aluminum etc and of the type selected from the group consisting of conventional or seamless extruded ribbed splined within a thickness ranging from schedule 40 to schedule xxs defining a tangency point where a bend will occur pre heating the pipe by means of the flame of an oxi gas torch at the tangency point plus approximately 2 u2033 at a temperature of between 570 u00b0 f to 2200 u00b0 f for a time of between 30 seconds to 60 minutes and at a distance between the torch tip and the pipe that depends on the pipe material and thickness an adequate pre heating allows the material to yield when carrying out subsequent bending steps minimizing deformations pre bending the pipe 180 u00b0 using as reference the tangency point as bending point in order to obtain a u201c u u201d shaped piece having two straight sections depending of a bent section using conventional means which may comprise any bending tool until a bending radius r d of 1.