초록 ▼

A lightweight conduit for fluid conveyance, having an outer conduit portion formed of rigid insulation material, an inner conduit portion formed of rigid insulation material, the inner conduit portion having an outer surface and an inner surface and first and second ends, the inner and outer conduit

A lightweight conduit for fluid conveyance, having an outer conduit portion formed of rigid insulation material, an inner conduit portion formed of rigid insulation material, the inner conduit portion having an outer surface and an inner surface and first and second ends, the inner and outer conduit portions being aligned and adhered together so that one end of the inner conduit portion protrudes outwardly beyond the corresponding end of the outer conduit portion, and the second end of the inner conduit portion is recessed into the second end of the outer conduit portion, and a resin coating is applied over the outer surface of the outer conduit portion and over the inner surface of the inner conduit portion so that the lightweight conduit is both corrosion-resistant and flame-resistant.

대표청구항 ▼

1. A lightweight conduit for fluid conveyance, comprising:(a) an outer conduit portion formed of rigid foam material, the outer conduit portion having an outer surface and an inner surface and first and second ends;(b) an inner conduit portion formed of rigid foam material, the inner conduit portion

1. A lightweight conduit for fluid conveyance, comprising:(a) an outer conduit portion formed of rigid foam material, the outer conduit portion having an outer surface and an inner surface and first and second ends;(b) an inner conduit portion formed of rigid foam material, the inner conduit portion having an outer surface and an inner surface and first and second ends, the outer surface substantially conforming to the inner surface of the outer conduit portion;(c) the inner and outer conduit portions being aligned and adhered together wherein the first end of the inner conduit portion protrudes outwardly beyond the first end of the outer conduit portion, and the second end of the inner conduit portion is recessed into the second end of the outer conduit portion; and(d) a protective coating on the inner surface of the inner conduit portion wherein the coated inner surface defines an interface for fluid conveyance. 2. The conduit of claim 1 further including a corrosion-resistant and flame-resistant coating on the outer surface of the outer conduit portion. 3. The conduit of claim 1 wherein the rigid foam is selected from the group of materials consisting of polymerized polyurethane, modified polyisocyanurate, and rigid cellular plastic. 4. The conduit of claim 1 wherein the conduit is substantially round in cross-section. 5. The conduit of claim 1 wherein the conduit is substantially rectangular in cross-section. 6. The conduit of claim 1 wherein the inner and outer portions of the conduit are attached with an adhesive selected from the group of adhesives consisting of mastic and vinyl ester resin. 7. The conduit of claim 1 wherein the coating applied to the inner surface of the inner panel is vinyl ester resin. 8. The conduit of claim 7 wherein the vinyl ester resin minimizes moisture migration and corrosive intrusion through the inner and outer portions of the conduit. 9. A lighlweighlt conduit for fluid conveyance, comprising:(a) two conduit half sections, each of said half sections having:(i) an outer portion formed of rigid foam, the outer portion having an outer surface and an inner surface and first and second ends;(ii) an inner portion formed of rigid foam, the inner portion having an outer surface and an inner surface and first and second ends, the outer surface substantially conforming in dimension to the inner surface of the outer portion;(iii) the inner surface of the outer portion and the outer surface of the inner portion being aligned and adhered together, and wherein the first end of the inner conduit portion protrudes outwardly beyond the first end of the outer conduit portion, the second end of the inner conduit portion being recessed into the second end of the outer conduit portion;(iv) a protective coating on the inner surface of the inner conduit portion wherein the coated inner surface defines an interface for fluid conveyance; and(b) wherein the two half sections are attached together to form a complete conduit. 10. The conduit of claim 9 further including a corrosion-resistant and flame-resistant coating on the outer surface of the outer conduit portion. 11. The conduit of claim 9 wherein the rigid foam is selected from the group of materials consisting of polymerized polyurethane, modified polyisocyanurate, and rigid cellular plastic. 12. The conduit of claim 9 wherein the conduit is substantially round in cross-section. 13. The conduit of claim 9 wherein the conduit is substantially rectangular in cross-section. 14. The conduit of claim 9 wherein the inner and outer portions of the conduit are attached with an adhesive selected from the group of adhesives consisting of mastic and vinyl ester resin. 15. The conduit of claim 9 wherein the coating applied to the inner surface of the inner conduit portion is vinyl ester resin. 16. The conduit of claim 15 wherein the vinyl ester resin minimizes moisture migration and corrosive intrusion through the inner and outer portions of the conduit. 17. A lightweigh t conduit for fluid conveyance, comprising:(a) two conduit half sections, each half section formed of rigid foam and having:(i) an outer surface and an inner surface, and first and second ends;(ii) a male portion extending outward from the first end, the male portion having an inner surface and an outer surface;(iii) a female portion recessed inward from the second end, the female portion having an inner surface and an outer surface, and wherein the inner surface of the female portion conforms in dimension to the outer surface of the male portion;(iv) a protective coating on the inner surface of each conduit half section wherein the coated inner surface defines an interface for fluid conveyance; and(b) wherein the two half sections are attached together to form a complete conduit. 18. The conduit of claim 17 further including a resin coating on the outer surface of each conduit half section, wherein the lightweight conduit is flame-resistant and minimizes moisture migration and corrosive intrusion through the outer surface. 19. The conduit of claim 17 wherein the rigid foam is selected from the group of materials consisting of polymerized polyurethane, modified polyisocyanurate, and rigid cellular plastic. 20. The conduit of claim 17 wherein the conduit is substantially round in cross-section. 21. The conduit of claim 17 wherein the conduit is substantially rectangular in cross-section. 22. The conduit of claim 17 wherein the resin coating minimizes moisture migration and corrosive intrusion through the inner surface of each conduit half section. 23. A lightweight conduit for fluid conveyance, comprising:(a) an outer conduit portion formed from a plurality of pieces of rigid foam material assembled together, the outer conduit portion having an outer surface and an inner surface and first and second ends;(b) an inner conduit portion formed from a plurality of pieces of rigid foam material assembled together, the inner conduit portion having an outer surface and inner surface and first and second ends, the outer surface substantially conforming to the inner surface of the outer conduit portion;(c) the inner and outer conduit portions being aligned and adhered together wherein the first end of the inner conduit portion protrudes outwardly beyond the first end of the outer conduit portion, and the second end of the inner conduit portion is recessed into the second end of the outer conduit portion; andd) a protective coating on the inner surface of the inner conduit portion wherein the coated inner surface defines an interface for fluid conveyance. 24. The conduit of claim 23 further including a corrosion-resistant and flame-resistant coating on the outer surface of the outer conduit portion, wherein the coating further minimizes moisture migration and corrosive intrusion through the conduit surfaces. 25. The conduit of claim 23 wherein the rigid foam is selected from the group of materials consisting of polymerized polyurethane, modified polyisocyanurate, and rigid cellular plastic. 26. The conduit of claim 23 wherein the conduit is substantially round in cross-section. 27. The conduit of claim 23 wherein the inner and outer portions of the conduit are assembled and attached with an adhesive selected from the group of adhesives consisting of mastic and vinyl ester resin. 28. The conduit of claim 23 wherein the coating applied to the inner surface of the inner panel is vinyl ester resin. 29. A lightweight conduit for fluid conveyance, comprising:(a) an outer conduit portion formed of rigid foam material, the outer conduit portion having an outer surface and an inner surface and first and second ends;(b) an inner liner portion formed of corrosion-resistant and flame-resistant resin, the inner liner portion having an outer surface and an inner surface and first and second ends, the outer surface substantially conforming to the inner surface of the outer conduit portion, wherein the inner surface of the inner liner portion defines an interface for fluid conveyance; and(c) the inner liner and outer conduit portions being aligned and adhered together wherein the first end of the inner liner portion protrudes outwardly beyond the first end of the outer conduit portion, and the second end of the inner conduit portion is recessed into the second end of the outer conduit portion. 30. The conduit of claim 29 further including a flame-resistant resin coating on the outer surface of the outer conduit portion, wherein the coating further minimizes moisture migration and corrosive intrusion through the outer surface. 31. The conduit of claim 29 wherein the rigid foam is selected from the group of materials consisting of polymerized polyurethane, modified polyisocyanurate, and rigid cellular plastic. 32. The conduit of claim 29 wherein the conduit is substantially round in cross-section. 33. The conduit of claim 29 wherein the inner liner and outer portion of the conduit are attached with an adhesive selected from the group of adhesives consisting of mastic and vinyl ester resin.