Sealing mechanical tube joints

Details Sealing mechanical tube joints Sealing mechanical tube joints

1983-12-09

1984-11-13

Dawson, Robert

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

291573C, 156294, B32B 3116, B32B 704

Patent

active

044824157

ABSTRACT:
A method of making leak-tight tube joints, in a non-brazed tubular heat exchanger or the like, including the steps of expanding tube ends out into mechanical contact with a header plate in which they are received, and, in conjunction with this step, introducing a sealant into tube joints. According to one invention aspect, the sealant has the form of a relatively ductile elastomeric or metallic material and is introduced into a joint as a coating on a tube end. In another invention aspect, the sealant has the form of an anaerobic adhesive and is introduced into the joint as a liquid by a capillary action for subsequent curing in the hidden crevices and voids of the joint.

REFERENCES:
patent: 3471178 (1969-10-01), Roe
patent: 4152818 (1979-05-01), Mort et al.
patent: 4295522 (1981-10-01), Frei
patent: 4421160 (1983-12-01), Stafford et al.

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