Patent ID: 9039854
Filing Date: 2015-05-26
Classification: C09J,F16B,F16L

Abstract:
1. A method for joining a first tube with a second tube, the tubes being joined together in an overlap zone using an adhesive which fills a gap in the overlap zone between the tubes, comprising: providing a first tube with an overlap zone adjacent one end, the first tube inner surface in the overlap zone being cylindrical, providing a second tube with an overlap zone adjacent one end, the second tube outer surface in the overlap zone being cylindrical, the adhesive is applied onto the overlap zone of at least one of the tubes, the adhesive being selected such that, after application onto the overlap zone and before joining the tubes, it is solid at temperatures of below 30° C. and does not cure without thermal activation and the adhesive volume increases irreversibly by at least 0.5% on thermal activation, the tube with the adhesive applied in the overlap zone is placed on the other tube or inserted therein, the tubes are fixed relative to one another in the overlap zone using a heatable clamp, the clamp being designed such that it is capable of heating the tubes in the overlap zone, the adhesive is thermally activated by heating the overlap zone with the assistance of the heatable clamp, such that it cures and joins the two tubes in the overlap zone, and, once the adhesive has cured, the heatable clamp is removed, wherein an inner surface of the first tube is bonded to an outer surface of the second tube by the cured adhesive, an outer surface of the first tube forms an exterior surface of the joined overlap zone and an inner surface of the second tube forms an interior surface of the overlap zone.