THERMOSETTING COUPLING Russian patent published in 2008 - IPC F16L21/00 

FIELD: mechanics.

SUBSTANCE: invention relates to water proofing of pipeline permanent joints and can be used for protection of welded joints of heat-insulated heat-, oil- and water-pipelines. Thermosetting coupling comprises casing made from cross-linked polyethylene and made up of thermosetting h-thick ends and H-thick central part. Note that the casing is made up of thermosetting sheet layer, the novelty of this invention consisting in that the casing layers are glued together with the casing central part thickness and the casing thermosetting ends length are selected proceeding from the ratios H = (1.5 to 2.0)h, where H is the casing central part thickness, h is the casing thermosetting end thickness, and l=(0.1 to 1)L, where l is the length of casing thermosetting ends, L is the casing central part length.

EFFECT: higher strength of thermosetting coupling, higher reliability of water-proofing of welded joint, lower labor input in coupling mounting.

2 dwg