Fire protective hose assembly
View Patent ↗A flexible hose for conveying fluids and suitable for high temperature environments, in one embodiment the hose assembly comprises a thermal paint coated nipple, a core tube, a thermal insulating layer surrounding the core tube, a cover layer surrounding the thermal insulating layer, and a vented jacket surrounding the cover layer. The thermal insulating layer may be a fibrous material such as a silica fiber. The cover layer may be thermally stable up to 750° F. or higher. The vented jacket may be a wire braid having interstices therein and formed from a corrosion resistant material.
1. A hose assembly comprising:
a core tube;
an insulating layer surrounding the core tube;
a vented anti-chafing jacket surrounding the insulating layer; and
a chemical resistant polyimide layer interposed between the insulating layer and the vented anti-chafing jacket;
wherein the vented anti-chafing jacket is the outermost layer of the hose; and
wherein the insulating layer is non-ablative at least when the hose is subjected to a fire at 2000° F. for a period of 15 minutes.
2. A hose assembly comprising:
a core tube;
an insulating layer surrounding the core tube; and
a vented anti-chafing jacket surrounding the insulating layer, the vented anti-chafing jacket comprises a corrosion resistant material chosen from a stainless steel, a nickel alloy, or combinations thereof;
anti-chafing jacket is the outermost layer of the hose; and
wherein the insulating layer is non-ablative at least when the hose is subjected to a fire at 2000° F. for a period of 15 minutes.
3. The hose assembly of claim 2 , wherein the insulating layer comprises a material chosen from a silica fiber, a fiberglass, a ceramic fiber, or combinations thereof.
4. The hose assembly of claim 2 , wherein the vented jacket comprises a CRES or nickel alloy wire braid having interstices therein.
5. The hose assembly of claim 4 , wherein the wire braid is formed from a type 321 stainless steel, a type 347 stainless steel, or combinations thereof.
6. The hose assembly of claim 2 , wherein the vented jacket comprises a corrugated tube comprising at least one vent hole disposed through a wall thereof.
7. The hose assembly of claim 2 further comprising a fitting and a sleeve attached to each end of the hose.
8. The hose assembly of claim 7 , wherein an exterior surface of a nipple portion of the fitting is coated with a thermal paint.
9. A hose assembly comprising:
a PTFE tube;
a reinforcing layer surrounding the PTFE tube;
an insulation layer comprising silica fiber, the insulation layer surrounding the reinforcing layer;
a cover layer comprising a polyimide film, the cover layer surrounding the insulation layer; and
a corrosion resistant braid positioned about the polyimide layer and forming an outer layer of the hose.
10. The hose assembly of claim 9 further comprising a steel sleeve on each end of the hose, the steel sleeve positioned about the outer layer of the hose.
11. The hose assembly of claim 9 further comprising a fitting attached to each end of the hose, wherein an exterior surface of a nipple portion of each fitting is coated with a thermal paint.
12. A hose assembly comprising:
a core tube;
a fitting attached to each end of the core tube, wherein an exterior surface of a nipple portion of each fitting is coated with a thermal paint and inserted into the core tube.
13. The hose assembly of claim 12 further comprising:
an insulating layer surrounding the core tube;
a chemical resistant layer surrounding the insulating layer; and
a vented anti-chafing jacket surrounding the chemical resistant layer.
14. The hose assembly of claim 13 , wherein the insulating layer comprises a material chosen from a silica fiber, a fiberglass, a ceramic fiber, or combinations thereof.
15. The hose assembly of claim 13 , wherein the chemical resistant layer comprises a polyimide film.
16. The hose assembly of claim 13 , wherein the vented anti-chafing jacket comprises a CRES or nickel alloy wire braid having interstices therein.
17. The hose assembly of claim 9 , wherein the insulating layer is non-ablative at least when the hose is subjected to a fire at 2000° F. for a period of 15 minutes.
18. The hose assembly of claim 13 , wherein the insulating layer is non-ablative at least when the hose is subjected to a fire at 2000° F. for a period of 15 minutes.