Process for the sealing and internal repair of systems of laid conduits
OwnerWerner Nafinventor
Life of this patent
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Abstract
A process for the sealing and internal repair of systems of laid conduits in which a sealant is introduced into the leaky conduit by means of air, the sealant being dry, finely ground, water-swellable bentonite; a dry, hydraulically disintegratable plastic dispersion preparation; or a mixture thereof. The conduit is then filled with a fluid, the fluid being either water or a mixture of steam and air. Alternatively, the sealant is introduced into the leaky conduit by means of water, the sealant being a finely divided, inert material. The conduit is emptied and compressed air charged with particles of an abrasive substance is blown through it. The conduit is then internally coated by blowing into it a solvent-free epoxy resin containing a hardener and fibers.
Claims24
A process for the sealing and internal repair of at least one leak in a system of laid conduits, the process comprising the following steps:
- (a) introducing a sealant into the conduit by means of air;
- (b) filling the conduit with a fluid., the fluid cooperating with the sealant to seal the leak;
- (c) emptying the fluid from the conduit;
- (d) blowing through the emptied conduit compressed air that is charged with particles of an abrasive substance;
- and
- (e) then internally coating the conduit by introducing and blowing into it a solvent-free epoxy resin containing a hardener and fibers, the fibers being selected from the group consisting of cellulose fibers, glass fibers, and a mixture of cellulose fibers and glass fibers.
Dependencies are inferred from the claim text.