An induction coil is placed around a small section of the pipe at the bend point. It is then induction heated to between 800 and 2,200 degrees Fahrenheit (430 and 1,200 C). While the pipe is hot, pressure is placed on the pipe to bend it. The pipe can then be quenched with either air or water spray or be cooled against ambient air.
Induction bending is used to produce bends for a wide range of applications, such as (thin walled) pipe lines for both the upstream and down stream and on- and off shore segments of the petrochemical industry, large radius structural parts for the construction industry, thick walled, short radius bends for the power generating industry and city heating systems.
Big advantages of induction bending are:
* no need for mandrels
*  bend radii and angles (1°-180°) can be freely selected
*  highly accurate bend radii and angles
*  accurate pipe spools can easily be produced
*  significant savings can be obtained on field welds
*  wide range of pipe sizes can be accommodated in one machine (1” OD thru 80”OD)
*  excellent wall thinning and ovality values