F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
F28F 11/00 (2006.01) F16L 55/165 (2006.01) F28F 1/00 (2006.01) F28F 13/18 (2006.01)
Patent
CA 2150316
A method of installing a liner in a dry parent tube of a heat exchanger includes inserting a continuous tubular liner into the parent tube, sealing one end of the continuous tubular liner and sealingly attaching the other end to a source of pressurized fluid and injecting fluid under pressure into the continuous tubular liner to hydraulically expand the tubular liner substantially into contact with the parent tube. The interior of the parent tube may be cleaned beforehand, preferably to a white metal finish. Opposed ends of the continuous tubular liner are milled to conform to the opposed ends of the parent tube, and the opposed ends of the continuous tubular liner are roller expanded into a compression fit with the parent tube. The opposed ends of the continuous tubular liner may be flared into contact with flared ends of the parent tube. An apparatus for expanding a continuous tubular liner into a compression fit with a parent tube of a heat exchanger has a first tube sealing chuck attachable to one end of the continuous tubular liner; a second tube sealing chuck attachable to the other end of the continuous tubular liner; and a pump for supplying fluid to the interior of the continuous tubular liner through one of the tube sealing chucks. The pump has a liquid inlet and a gas inlet and a switching valve to select one or both of the inlets.
Bories Thomas D.
Lambert Anthony R.
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