Process for sealing damaged pipes

Details Process for sealing damaged pipes Process for sealing damaged pipes

B - Operations, Transporting

05

C

117/71, 32/22.5

B05C 7/02 (2006.01) F16L 55/1645 (2006.01)

Patent

CA 1336663

According to the process, in a pipe to be lined, is firstly applied an insulating intermediate layer and to the latter is applied the mechanically and chemically stable layer to be sealed. For the sealing resin system, the inter- mediate layer forms the thermally and chemically correct substrate to which, despite dirt and wet in the sewer pipe, the desired coating can be applied in such a way that correct hardening is possible and the service life corresponds to the material used. In an also preferred manner, the process provides for the direct application of a resin layer to the inner face of the pipe to be lined. For eliminating the moisture, the resin system component reacting with the water is sprayed onto the pipe inner face, so that the water is bound or combined. The resin mixture is then applied by a centrifugal process. Optionally it is possible to apply a final coating with a harder resin system and greater mechanical strength to the resin coating already formed, the lower, first resin coating offering the correct medium for a more sensitive resin system, such as e.g. an epoxy resin.

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