The state of the art of induction bent pipe

This paper firstly describes trends in induction bending techniques and materials for high strength induction bent pipes up to X80 grade, and then introduces performance of high strength induction bent pipes and corrosion resistant alloy bent pipes. The new bending techniques such as the continuous heating and cooling process and the water cooling method from both inside and outside, and alloy design of the steel and the weld metal suited for the induction bending enabled to manufacture high strength and good toughness microalloyed steel bent pipes with low Ceq and hence good weldability and to improve corrosion resistance of corrosion resistant alloy bent pipes.