Induction pipe bending technology was first introduced in the metal bending market in the 1960s, using high frequency induction heating.

Induction bending uses inductors to locally heat steel by induction, resulting in a narrow heat band in the shape to be bent. The shape is pushed through the inductor by an accurate drive system causing the hot section to form the bend at the set radius. The resulting bent component is then cooled by water, forced or still air to fix the bend shape.

Induction bending delivers several advantages in pipe bending applications including precision control of conditions for heating and cooling narrow sections of steel pipe ensuring consistent quality and shape; and continuous and highly automated bending process from start to finish.

Induction bending technology has evolved since the 1960s, with improvements in shape and dimensions as well as the ability to undertake small-radius bending.

Induction pipe bending is widely used in a number of applications including marine, power generation, petroleum, gas and chemical exploration plants, line pipes for LNG and gas as well as steel materials utilised in building and civil construction.

Thanks to CAD advances, Bendpro Durabend bends support the free design and creation of a wide range of structures and applications including pedestrian bridges, roof beams for stadiums, bridge footing arches, train stations, sports pavilions and community facilities among many others.

Durabend’s induction bending offers several advantages over cold bending including extremely accurate processing minimising any spring-back affecting the bend radius and angle to assure stable dimensional accuracy; free-shape processing with no bending die needed to process any bending radius or angle; small-radius bending of heavy walled steel pipes for high-pressure steam piping; and bending for even mechanical properties such as strength and robustness.

Bendpro stocks the full range of Durabend products including 3D and 5D radius pipe bends in 100NB to 400NB sizes as well as 1.5D butt-weld elbows in STD and XS gauge.

Bendpro’s induction bending also reduces labour costs in plant piping construction by using bends instead of elbows. The reduction in the number of welds means reduced welding and inspection costs, and higher piping quality. Induction bending is also delivering critical specification accuracy, strength stability and robustness to meet customers’ requirements.

Bendpro serves petrochemical, mining and energy among many other industries with its weldless piping system technology.