A DEVICE FOR REPAIR OF DAMAGES OR PROVISION OF BRANCHINGS ON EXISTING PIPE INSTALLATIONS

摘要

A device for repairing damages or providing branchings on pipes, especially in existing underwater pipe installations, comprises a cylindrical, longitudinally divided muff (1) which is dimensioned to be placed around and clamped to the topical pipe (4) by a clamping means (6), a sealing means (18) being provided between the muff (1) and the surface of the pipe (4). At least one of the muff members (2, 3) is composed of a strong outer layer (10) and a less strong inner layer (11) which layers are joined so as to form an intermediate closed volume (14 and 15), said muff member (2 or 3) being provided with a means (17) for supplying a hydraulic pressure medium (19) to said volume, so that the volume when pressurized expands and the inner layer (11) and the sealing means (18) thereby are pressed to sealing engagement with the adjacent surface of the pipe (4).