EP0502908A1 - Feuergeschütztes rohr und rohrleitung - Google Patents

Feuergeschütztes rohr und rohrleitung

Info

Publication number
EP0502908A1
EP0502908A1 EP19900917573 EP90917573A EP0502908A1 EP 0502908 A1 EP0502908 A1 EP 0502908A1 EP 19900917573 EP19900917573 EP 19900917573 EP 90917573 A EP90917573 A EP 90917573A EP 0502908 A1 EP0502908 A1 EP 0502908A1
Authority
EP
European Patent Office
Prior art keywords
pipe
fire
covering
coating
fire protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19900917573
Other languages
English (en)
French (fr)
Inventor
Thomas Christopher 2 Smithfield Road Arnott
Iain Stephen Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Pipe Coaters Ltd
Original Assignee
British Pipe Coaters Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Pipe Coaters Ltd filed Critical British Pipe Coaters Ltd
Publication of EP0502908A1 publication Critical patent/EP0502908A1/de
Withdrawn legal-status Critical Current

Links

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
    • 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

Definitions

  • This invenion relates to fire protected pipelines which carry hazardous materials, particularly inflammable materials, such as risers on off shore installations and crude oil feed pipes at refineries.
  • the invention further relates to a method of forming said pipelines.
  • a protected pipe comprising a pipe having anti- corrosion protection, a fire protection covering around the pipe, and a retaining covering around the fire protection covering, said retaining covering being flexible and substantially water impermeable and including a base matrix material having a dispersion of one or more metal containing compounds therein which fuse together upon exposure to a temperature of about 500°C or more to form a stable coating which in turn retains the fire protection covering in position.
  • a method of pacifying a pipe against fire comprising forming on the pipe anti-corrosion protection, a fire protection covering around said anti-corrosion protection, and forming a retaining covering around said fire protection-covering, said retaining covering being flexible and substantially water impermeable and including a base matrix material having a dispersion of one or more metal containing compounds therein which fuse together upon exposure to a temperature of about 500°C or more to form a stable coating which in turn retains the fire protection covering in position.
  • the metal containing compounds should have a sufficiently low melting point, that they will melt on exposure to the heat of a hydrocarbon fire, which may typically be about 800°C to 1400°C, more particularly 1000°C to 1100°C, to form an inorganic type coating which will be stable in the high temperatures of the fire at least about 10 to 15 minutes preferably 1 to 4 hours. In this way even though the base matrix material may char the fused metal containing coating will hold the outer retaining coating together and thereby retain the fire protection covering on the pipe long enough to prevent an immediate blow out, and thereby allow time to evacuate the danger area.
  • the inventor has therefore achieved a method of applying and modifying materials in such a way that the combined protection of anti-corrosion and passive fire protection is achieved for steel pipelines. Furthermore for risers and like structures on both off-shore and on-shore installations, the invention can be used both above and below the water line.
  • a ceramic-type or glass-type coating which is sufficiently flame resistant to retain the fire protection material in place and thereby delay a blow out of the hydrocarbons in the pipe.
  • ceramic-type we mean a crystalline, inorganic metal and by glass-type we mean a non-crystalline solid.
  • the metal containing compounds can be one or more of metals, metal oxides, borates, hydrates, amines and similar compounds which will melt and fuse and remain stable in a hydrocarbon fire, .
  • the metals of said compounds can be zinc, aluminium, magnanese, magnesium, calcium and iron.
  • the preferred metal containing compounds have been aluminium trihydrate, zinc borate, calcium oxide, zinc oxide, manganese oxide, or a combination thereof.
  • the outer retaining coating should in normal operating conditions provide a water impermeable barrier and should be sufficiently flexible to allow both thermal and mechanical movement of the pipe, and protect it again abrasion or impact such as from wave loadings.
  • Suitable base matrix material which have been found to date to display the desired properties comprise one or more of an ethylene acrylic polymer, copolymer based on vinyl acetate, polychloroprene, and polyurethane. Preferably a smaller amount of said copolymer is mixed with a major amount of an ethylene acrylic polymer as a viscosity modifier.
  • Conventional fire protection material is suitable for use in the invention and could be applied in a number of forms.
  • several connected slabs of such material could be striated and wound around the pipe. This would allow a thick and flexible covering of fire resistant material to be easily applied to the pipe.
  • relatively thin sheets of fire protection material could be wrapped round the pipe. In this manner thin layers of fire protection material are built up, which could be different grades.
  • the fire protection material should typically be able to withstand temperatures of about 1400°C for a minimum of about 10 to 15 minutes, preferably one to four hours.
  • Fig. 1 - is a longitudinal section through a riser pipe having various protective coverings (which includes a field joint) , in accordance with the invention
  • Fig. 2 - is a plan view of the pipe shown in Fig. 1 but having the protective coverings partially cut away for clarity;
  • Fig. 3 - is a plan view of a pipe being formed with protective coverings in accordance with the invention.
  • Fig. 4 - is a cross-sectional view through the field joint shown in Fig. 1.
  • a riser carries the crude oil from the well onto the oil rig.
  • the well is sub-sea and that the rig is off-shore. If there is a fire on the oil rig the riser above the water line will be liable to damage by the fire and this may lead to a blow out.
  • the length of riser pipe illustrated in Figs. 1 and 2 is pacified against fire in accordance with the invention and mitigates this problem.
  • the protected pipes are factory-prepared and then transported to the oil rig where they are welded together and set vertically in place.
  • Each pipe 1 is coated with an anti-corrosion covering 2, a fire protection covering 3, and retaining covering 4 as follows.
  • uncured polychloroprene (neoprene) and bonding agents are extruded onto its outer surface apart from about 50 to 70cm at either end la of the pipe 1. This extrudate is cured to form the anti-corrosion covering 2.
  • the fire protection covering 3 which comprises a plurality of flat blocks each of which is formed from a conventional fibrous fire protection material such as discussed in the aforementioned PCT application, and has a width of about 30 to 50cm and a depth of about 5cm.
  • One major face of each block (not shown) is deeply grooved (striated) across the width to form a plurality of parallel spaced bars interconnected by webs.
  • the blocks are then joined end to end by webbing to form a continuous strip which, because of the imparted flexibility, of the striations can be spirally wound round the pipe 1, as shown in Fig. 3, to form a continuous relatively thick fire resistant covering 3.
  • this latter covering stops just short of either end of the anti- corrosion covering 2.
  • thin sheets of fire protection material can be applied in a cigarette wrap type fashion.
  • the whole pipe 1 apart from the exposed ends la are then encapsulated (by e.g. extrusion, hand layup or casting) in the outer retaining covering 4 which tapers over the exposed ends of the anti-corrosion 2 and fire protection coverings 3.
  • the retaining covering 4 is formed from a base matrix material of modified elastomer containing inorganic fillers. Other materials are employed to convert the base polymer into a synthetic rubber with a range of desired properties.
  • the retaining covering 4 is also extruded. Both these coverings 2 and 4 are then cured to form the finished pipe.
  • the retaining covering 4 is impermeable to water and due to its elastomeric properties will also lend some abrasion and impact resistance to the system.
  • the outer retaining covering is prepared as follows (all parts are by weight) . 80 parts of Vamac (trade mark of Dupont) which is an ethylene acrylic polymer is mixed with 20 parts of Elvax (trade mark of Dupont) which is a copolymer based on vinyl acetate.
  • the outer coating was modified by substituting the aluminium trihydrate and zinc borate with a mixture of calcium oxide, zinc oxide, and manganese oxide at from 10 to 60 parts. These oxides melt/fuse at about 450°C.
  • the finished protected pipes are connected by welding at their exposed ends la and then a field joint 5 applied (see Figs. 1 and 4) , again in accordance with the invention. Therefore an anti-corrosion covering 2, fire protection covering 3 and retaining covering 4 will be applied, generally diverging outwardly to conform with the coverings of the two adjacent pipe ends and thereby form a fire protected encapsulated pipeline.
  • the high temperatures of the fire will burn away the elastomeric retaining covering 4 and fuse the inorganic fillers to form a brittle ceramic-type fibrous coating which does not disintegrate and retains the fire protection material in place.
  • the riser can therefore be protected against serious damage from the external fire for about one to four hours depending on the type and thickness of the fire protection covering 3. This short period could be critical in the evacuation of the oil rig.
  • the ceramic-type retaining covering will also provide additional mechanical strength and flame protection.
  • the fire protected pipe of the invention could also be used as crude oil feed pipe to refineries.
  • the invention would be applicable for any conduit carrying hazardous materials, not necessarily inflammable materials, which may be exposed to an external fire either on shore or off-shore.
  • the fire protection covering is also acting as a heat insulator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Thermal Insulation (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
EP19900917573 1989-11-29 1990-11-28 Feuergeschütztes rohr und rohrleitung Withdrawn EP0502908A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8926967 1989-11-29
GB898926967A GB8926967D0 (en) 1989-11-29 1989-11-29 Fire protected pipe and pipeline

Publications (1)

Publication Number Publication Date
EP0502908A1 true EP0502908A1 (de) 1992-09-16

Family

ID=10667114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900917573 Withdrawn EP0502908A1 (de) 1989-11-29 1990-11-28 Feuergeschütztes rohr und rohrleitung

Country Status (5)

Country Link
EP (1) EP0502908A1 (de)
AU (1) AU6881191A (de)
BR (1) BR9007880A (de)
GB (1) GB8926967D0 (de)
WO (1) WO1991008372A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5158397A (en) * 1991-05-03 1992-10-27 Paul-Munroe Hydraulics, Inc Passive fire protective systems for articulating joints and flexible connections
US5169265A (en) * 1991-09-27 1992-12-08 Paul-Munroe Hydraulics, Inc. Passive fire protection system for marine risers
GB0201773D0 (en) * 2002-01-25 2002-03-13 Isis Innovation X-ray diffraction method
ES1108631Y (es) * 2014-04-15 2014-08-04 Espiroflex S A Manguera de recubrimiento de cables y tuberias
CN107654757A (zh) * 2017-09-07 2018-02-02 沪东中华造船(集团)有限公司 一种船用防火软管

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130223B (en) * 1982-05-07 1986-05-29 Norsk Kabelfabrik As Fire resistant material
NO153549C (no) * 1983-04-13 1986-04-09 Norsk Fiberoptikk As Brannsikker fiberkabel.
US4702861A (en) * 1986-05-14 1987-10-27 Certified Technologies Corporation Flame retardant materials
NO167687C (no) * 1987-01-29 1991-11-27 Eb Norsk Kabel As Fremgangsmaate og anordning ved hovedsakelig roer- eller slangeformede brannbeskyttede gjenstander.
DE3730204A1 (de) * 1987-09-09 1989-03-30 Bayer Ag Brandschutzmittel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9108372A1 *

Also Published As

Publication number Publication date
GB8926967D0 (en) 1990-01-17
AU6881191A (en) 1991-06-26
WO1991008372A1 (en) 1991-06-13
BR9007880A (pt) 1992-10-20

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