Patent EA-001409-B1 (EA)
Title: Corrosion and fire-resistant pipeline
Inventor: SJOTUN KYRRE
IPC: A62C35/68
Filed: 1998-08-28
Abstract: 1. A corrosion-resistant and fire-resistant pipeline suitable for sprinkler systems and the like in the offshore industry and also on military and civilian seagoing vessels, and generally as sprinkler systems in official buildings and in industrial buildings, characterised in that the pipe system includes rigid and cold-formable pipe sections (10) that have one or more tubular rubber layers (11, 13, 15) and reinforcement layers (12, 14) that surround or embrace one or more of said tubular rubber layers (11, 13, 15), where said reinforcement layers are comprised of wires or ribbons that are wound, braided, knitted or formed in some other way so as to cross each other, and wherein each of said wires or ribbons defines with the longitudinal axis of the pipe section (10) a winding or spiralising angle that imparts the greatest possible strength to said reinforced, tubular rubber layers (11, 13, 15), and, when applicable, branch connections (18) for connecting a pipe section (10) to another pipe section in a multi-path coupling. 2. A corrosion-resistant and fire-resistant pipeline according to claim 1, characterised in that the reinforcement (12, 14) is encapsulated in one or more rubber layers (11, 13, 15). 3. A corrosion-resistant and fire-resistant pipelineline according to claim l, characterised in that the reinforcement (12, 14) lies as one or more separate layers between said rubber layers (11, 13, 15). 4. A corrosion-resistant and fire-resistant pipeline according to claim 1, characterised in that the reinforcement material is comprised of metal wire or carbon-fibre based composite wire. 5. A corrosion-resistant and fire-resistant pipeline according to claims 1-4, characterised in that at least one outer rubber layer (13, 15) is comprised of a rubber material or rubber type that has properties adapted for the specific application of the pipe material. 6. A corrosion-resistant and fire-resistant pipeline according to claims 1-5, characterised by a perforated casing that surrounds the inner rubber layer (11) in contact therewith, wherein said perforated casing may be comprised of one of said reinforcement layers (12) or may be a separate layer, and wherein said perforations have a smallest cross-sectional area chosen to provide a nozzle effect with respect to pressurised liquid in said pipe section (10), and also to impart to the pipe material self sealing properties even at extreme heat flux densities. 7. A branch connection (18) for connecting a pipe section (10) to another pipe section in the pipeline according to claims 1-6, characterised in that said branch connection includes a metal or plastic pipe-piece (17), a flange (12) mounted on the outside of said pipe-piece (17), a first semi-circular calliper (19) having a pipe-piece receiving hole (21) and an outwardly extending part (20) for supporting the flange (22), and an opposing, second semi-circular calliper (23), wherein said first and said second callipers (19, 23) together form a ring shaped join around the pipe section (10), with the aid of suitable coupling means (24), such as to hold the pipe-piece (17) sealingly in place in a hole (16) provided in the pipe section (10) when said pipe-piece is fitted. 8. A branch connection according to claim 7, characterised in that the pipe-piece (17) includes a sealing coating (25) on its outer surface downwards on the flange (22). 9. A branch connection according to claims 7 and 8, characterised in that the flange (22) has the form of a nut screwed onto said pipe-piece, therewith enabling the position of the flange on said pipe-piece (17) to be adjusted and preventing rotation of said pipe-piece (17).