Pipes and tubular conduits – Distinct layers – Bonded to each other
Patent
1998-09-18
1999-12-07
Brinson, Patrick
Pipes and tubular conduits
Distinct layers
Bonded to each other
138148, 138113, 138109, 138149, F16L 914
Patent
active
059966432
ABSTRACT:
Pipes used for carrying hot fluids such as steam and process liquids and gases, often above 212.degree. F., and pipes for carrying cold fluids such as for refrigeration and air conditioning systems, are usually insulated where they extend for any appreciable distance in areas of different temperatures, for reducing heat transfers. Such pipes are used in central heating and cooling distribution systems for cities, schools, universities, prisons, military bases, in industrial processing plants, and the like, whether installed above ground or underground. Polyisocyanurate and similar foamed insulation materials including polyurethane are better insulators than those now commonly used, such as foamglass, fiberglass, mineral wool, and calcium silicate; polyisocyanurate has a very low K factor and is stable at up to 400.degree. F. for sustained temperatures and up to 450.degree. F. peak temperatures. Foaming the polyisocyanurate about the pipe and within a thin, waterproof sleeve provides a well insulated pipe that is protected from water. Support members are applied to the thin waterproof sleeve and are spaced apart in an outer conduit to provide an air space so the pipe and sleeve can expand and contract within that conduit. This system provides a long-lived, highly efficient, insulated pipe wherein the chances of the insulation breaking down in the presence of water within the conduit or under thermal movement stresses is reduced to virtually nil. Vents and drains in the outer conduit as assembled allow for testing the integrity of the system and for purging the conduit of ground water and water vapor that may enter the conduit, as upon floods, high water tables, cooling and condensation, and the like.
REFERENCES:
patent: 3126918 (1964-03-01), Eaton
patent: 3213889 (1965-10-01), Cotman, Jr.
patent: 3467143 (1969-09-01), Croft
patent: 3677303 (1972-07-01), Martin
patent: 3932727 (1976-01-01), True
patent: 4124040 (1978-11-01), Miller
patent: 4233816 (1980-11-01), Hensley
patent: 4246057 (1981-01-01), Janowski et al.
patent: 4287245 (1981-09-01), Kikuchi
patent: 4303105 (1981-12-01), Rohner
patent: 4581804 (1986-04-01), McLaughlin
patent: 5732742 (1998-03-01), Mentzer et al.
LandOfFree
Foam insulation system for pipes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Foam insulation system for pipes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Foam insulation system for pipes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-813316