Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1972-10-26
1976-04-13
Shore, Ronald J.
Metal working
Method of mechanical manufacture
Assembling or joining
285 47, 285297, F16L 5916
Patent
active
039494616
ABSTRACT:
A method of providing insulated joints between consecutive lengths of insulated pipes each consisting of at least one fluid conducting pipe surrounded by a layer of heat insulating material and an outer protective tube from which the ends of the conductor pipe or pipes project, whereby two aligned pipe lengths are joined by joining the protruding conductor pipe ends by welding or otherwise, thereafter mounting a tube casing around the space between the adjacent ends of the insulating material, said casing being sealed against the end portions of the protective tubes, then letting a foam producing substance foam up inside the tube casing until the foam flows out through an upper hole in the tube casing, and thereafter closing this hole by means of a stopper, characterised in that the stopper is mounted in the hole before the foam appears therein, the stopper used being adapted so as to close the hole only partially in the first instance and having means operable to completely close the hole, these closing means being actuated for complete and permanent sealing of the hole after the foam having appeared at the outside of the partly closed hole. Further a tube casing having a hole and a stopper to be mounted in this hole, said stopper being of the expansion type and having a through going channel which is closed by the final tightening of the stopper so as to allow a small amount of foam material to be pressed out through the channel after the stopper being mounted in the hole, but before the final tightening of the stopper.
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patent: 3711124 (1973-01-01), Gerholt et al.
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A/S E. Rasmussen
Shore Ronald J.
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