Classifications

• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
  • E21B17/01—Risers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/06—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
  • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
  • B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
  • B32B25/16—Layered products comprising a layer of natural or synthetic rubber comprising polydienes homopolymers or poly-halodienes homopolymers
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B35/00—Methods or apparatus for preventing or extinguishing fires
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
  • F16L57/04—Protection of pipes or objects of similar shape against external or internal damage or wear against fire or other external sources of extreme heat
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
  • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
  • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
  • F16L58/04—Coatings characterised by the materials used
  • F16L58/10—Coatings characterised by the materials used by rubber or plastics
  • F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L59/00—Thermal insulation in general
  • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
  • F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L59/00—Thermal insulation in general
  • F16L59/14—Arrangements for the insulation of pipes or pipe systems
  • F16L59/145—Arrangements for the insulation of pipes or pipe systems providing fire-resistance
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
  • B32B2262/10—Inorganic fibres
  • B32B2262/101—Glass fibres
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/30—Properties of the layers or laminate having particular thermal properties
  • B32B2307/304—Insulating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/30—Properties of the layers or laminate having particular thermal properties
  • B32B2307/306—Resistant to heat
  • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/71—Resistive to light or to UV
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/726—Permeability to liquids, absorption
  • B32B2307/7265—Non-permeable
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/752—Corrosion inhibitor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

• the present invention relates to fire safety coatings for structures, particularly for steel line pipes for hydrocarbons in offshore activities, possibly for plastic material conduits for e.g. fire extinguishing installations in the oil industry, but also as a coating on e.g. flat or profiled structures of steel or other materials.
• the risers mentioned are constructed of steel, and are often provided with a rubber cladding vulcanized thereon for corrosion protection and mechanical protection in the splash zone.
• a rubber cladding vulcanized thereon for corrosion protection and mechanical protection in the splash zone.
• Fire protecting combination coatings i.e. multilayer coatings, are per se previously known.
• the outer layer is a composite material with a mineral matrix surrounding structural reinforcement elements.
• the outer layer may be inorganic, since the mineral matrix can be a material similar to a ceramic, and the reinforcement elements are metal fibres or mineral fibres.
• the function of the outer layer is to provide structural solidity for the coating, and to provide resistance against flames and "thermal shocks".
• An intermediate layer consists of a felt of refractory fibres, and this layer is intended to constitute a fire-retarding shield for the material inside.
• the inner layer is a thermally insulating layer with a cell structure, preferably of an organic type, i.e. cork or resin of a heat curable or thermoplastic type.
• EP 283.385 corresponds to the particular fire safety functions for the inner and outer layers in accordance with the present invention in its general form, even though these functions are preferably obtained using other types of materials than in EP 283.385.
• the intermediate layer of EP 283.385 suffers from the substantial drawback that oxygen may find its way therethrough, and hence lead to oxidation of the inner layer, thereafter leading to alteration of properties in an unfavourable direction, i.e. the thermal insulating property of the inner layer may in such a case be substantially impaired.
• the present invention provides a coating where the drawbacks of the prior art regarding mechanical strength, corrosion retarding effect and oxygen barrier effect are remedied.
• Steel pipe 1 which conducts hydrocarbons (not shown) in the center thereof, is to be protected.
• a layer 5 of natural rubber, synthetic rubber or plastic to constitute a mechanical protection layer.
• An inside layer 4 is provided to stop flame attacks, and is of an inorganic type.
• layer 4 consists of inorganic fibres, e.g. wound glass fibre ribbons.
• a layer 3 of a thermally highly insulating material preferably of rubber or plastic, and with great mechanical '* strength.
• This layer 3 provides delay of the heat transport in toward steel pipe 1.
• a corrosion inhibiting layer 2 of rubber or plastic which possibly also may exhibit good heat insula-tion properties.
• a specially developed neoprene rubber material may constitute this layer 2 which has special corrosion inhibiting properties and is a mechanically strong layer 2 which is vulcanized directly on to steel pipe 1.
• Thermally insulating layer 3 has special qualities in connection with a fire.
• this material which preferably is made of a special rubber compound or of a special type of plastic, works as a heat insulator.
• the layer 3 When this layer 3 is heated due to the fire, the layer develops reactive gases which draw outwards and react with the outside layers 4 and 5, converting these layers to a hard shell during the fire. The surplus thereafter remaining of the gases is combustible, and causes a counterfire on the outer surface of layer 5, against the actual fire.
• intermediate layer 3 Due to the overpressure from the gases formed, or actually due to the outwards migration of the gases, oxygen wil not be able to penetrate from the outside to cause a combustion of intermediate layer 3 itself. However, intermediate layer 3 will all the time be subject to pyrolysis, i.e. degradation without any supply of oxygen. This pyrolysis process leads to the formation of a new material structure inside layer 3, but this new structure also exhibits very good heat insulating characteristics, and takes care of keeping away the fire heat from the underlying structure 1 to be protected.
• inorganic layer 4 works as a flame shield, consisting of a non-combustible material, which thus prevents the flames from reaching the underlying rubber or plastic.
• the material of layer 5 shall also be a rubber or plastic material which is impervious to water, and additio ⁇ nally it protects the rest of the materials from degradation due to influence from the sun or chemical substances like e.g. ozone.
• layer 9 is a mechanically protective layer, preferably of chloroprene rubber
• layer 8 i ⁇ an inorganic flame inhibiting/flame stopping layer, preferably of inorganic fibres
• layer 7 is a new mechanically protecting layer of chloroprene rubber and layer 6 an inorganic fibre layer.
• the gas barrier which is formed has the effect that no undesired oxidation occurs in the insulating intermediate layer 3, which therefore maintains its favourable properties for a long time during a fire.
• the coating i ⁇ not in any manner intended to be used merely for protecting pipes, but also other constructions situated in a harsh climatic milieu, for instance construction parts, profile ⁇ and walls.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Geology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Fluid Mechanics (AREA)
• Physics & Mathematics (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Environmental & Geological Engineering (AREA)
• Laminated Bodies (AREA)
• Building Environments (AREA)
• Thermal Insulation (AREA)
• Rigid Pipes And Flexible Pipes (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19894129

Family Applications (1)

Country Status (2)

Cited By (7)

Families Citing this family (1)

Citations (3)

• 1991
  • 1991-05-06 NO NO911764A patent/NO175391C/no not_active IP Right Cessation
• 1992
  • 1992-05-06 WO PCT/NO1992/000087 patent/WO1992019903A1/en active Application Filing

Patent Citations (3)

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