Intrados induction heating for tight radius rotary draw bend

Details Intrados induction heating for tight radius rotary draw bend Intrados induction heating for tight radius rotary draw bend

B - Operations, Transporting

21

D

B21D 7/16 (2006.01) B21D 7/025 (2006.01)

Patent

CA 2259731

A boost bend method of making tight radius bends in boiler tubes, such as bends having a radius of lxD or less, in which a selected portion of the intrados of the tube is heated in a controlled manner thereby reducing the necessary tube wall thickness relative to the diameter of the tube for 180° bends. Tubes bent using the method may have wall thicknesses of about 6.6% of the tube diameter and suffer less than about 7% thinning of the extrados tube wall.

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