Patent ID: 6158476
Filing Date: 2000-12-12
Classification: F16L

Abstract:
A pipe or hose intended primarily for fire protection purposes and capable of withstanding high heat flux densities, wherein the pipe or hose has an internal, tubular rubber layer and a perforated casing having holes or perforations, which embraces the tubular rubber layer in close contact therewith, the holes or perforations being situated close together and having a limited cross-sectional area such that liquid transported in the pipe or hose at a liquid pressure above an atmospheric pressure forms a free standing liquid jet, wherein when used as a sprinkler pipe for extinguishing fire, the pipe or hose is imparted self-sealing and self-protecting properties and therewith withstands a heat flux density caused by a jet fire while essentially maintaining liquid pressure and liquid flow in said pipe continuously during the extinguishing process, said jet-fire heat flux density having a heat flux density up to about 500 kW/m.sup.2.