Non-metallic hydraulic expansion mandrel

Details Non-metallic hydraulic expansion mandrel Non-metallic hydraulic expansion mandrel

B - Operations, Transporting

21

D

B21D 39/20 (2006.01) B21D 39/08 (2006.01)

Patent

CA 2413912

A hydraulic expansion mandrel for expanding tubes in a heat exchanger tube bundle into a tubesheet is formed from a non-metallic material, such a carbon fiber- reinforced material. The mandrel includes an elongated cylinder having a tip, a fluid supply end and a reduced diameter section. A pair of O-rings separates the reduced diameter section from the tip and fluid supply end of the elongated cylinder. An adjustment shim, located between a threaded collar and a locking stop collar, adjusts the length of the mandrel inserted into a tube.

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