High temperature fire sleeve
View Patent ↗A flexible hose for conveying fluids and suitable for high temperature environments, the hose comprising a core tube, a thermal insulating layer surrounding the core tube, a metal 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 metal layer may also be a chemical resistant layer and be thermally stable up to at least about 550° F. The vented jacket may be a wire braid having interstices therein and formed from a corrosion resistant material.
1. A flexible hose assembly comprising:
a core tube;
a thermally insulating layer surrounding the core tube;
a chemical resistant layer surrounding the insulating layer, the chemical resistant layer comprising a metal layer; and
a vented jacket surrounding the chemical resistant layer.
2. The hose assembly of claim 1 , wherein the metal layer is a metal foil.
3. The hose assembly of claim 1 , wherein the metal layer is a metal film deposited on the insulating layer.
4. The hose assembly of claim 1 , wherein the metal layer comprises aluminum, stainless steel, nickel, iron, or a combination of two or more thereof.
5. The hose assembly of claim 1 , wherein the insulating layer comprises a material chosen from a silica fiber, a fiberglass, a ceramic fiber, or a combination of two or more thereof.
6. The hose assembly of claim 1 , wherein the vented jacket comprises a corrosion resistant material chosen from a stainless steel, a nickel alloy, or combinations thereof.
7. The hose assembly of claim 6 , wherein the vented jacket comprises a CRES or nickel alloy wire braid having interstices therein.
8. The hose assembly of claim 7 , wherein the wire braid is formed from a type 321 stainless steel, a type 347 stainless steel, or combinations thereof.
9. The hose assembly of claim 6 , wherein the vented jacket comprises a corrugated tube comprising at least one vent hole disposed through a wall thereof.
10. The hose assembly of claim 1 , further comprising a fitting and a sleeve attached to each end of the hose.
11. The hose assembly of claim 10 , wherein an exterior surface of a nipple portion of the fitting is coated.
12. The hose assembly of claim 1 , wherein the insulating layer is non-ablative when the hose is subjected to a fire at 2000° F. for a period of fifteen minutes.