GB2573769A - Protecting sleeve for pipework - Google Patents

Protecting sleeve for pipework Download PDF

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Publication number
GB2573769A
GB2573769A GB1807868.3A GB201807868A GB2573769A GB 2573769 A GB2573769 A GB 2573769A GB 201807868 A GB201807868 A GB 201807868A GB 2573769 A GB2573769 A GB 2573769A
Authority
GB
United Kingdom
Prior art keywords
pipework
plastic
pipe
sleeve
layer
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.)
Granted
Application number
GB1807868.3A
Other versions
GB2573769B (en
GB201807868D0 (en
Inventor
Alfred Ward Derek
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.)
Intumescent Systems Ltd
Original Assignee
Intumescent Systems 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 Intumescent Systems Ltd filed Critical Intumescent Systems Ltd
Priority to GB1807868.3A priority Critical patent/GB2573769B/en
Publication of GB201807868D0 publication Critical patent/GB201807868D0/en
Publication of GB2573769A publication Critical patent/GB2573769A/en
Application granted granted Critical
Publication of GB2573769B publication Critical patent/GB2573769B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F16L9/00—Rigid pipes
    • F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/065—Physical fire-barriers having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent
    • 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
    • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • F16L5/02—Sealing
    • F16L5/04—Sealing to form a firebreak device
    • 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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F16L55/1026—Fire protection devices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0263—Insulation for air ducts

Abstract

A protective sleeve to be fitted over plastic pipework 2B comprises a hollow plastic pipe 4 of larger diameter than the plastic pipework over which it is to be fitted. The outer surface of the plastic pipe having a layer of fiberglass 6 secured to it, the fiberglass being coated or impregnated with an intumescent material. The fiberglass layer can have a thickness of about 4mm, and the plastic pipe can also have a wall thickness of about 4mm. Plastic pipework to which the sleeve can be fitted can comprise a pipe with a wall thickness of about 4mm.

Description

Protecting sleeve for pipework
Field of invention
The present invention relates a protecting sleeve for pipework. More especially the invention relates to a sleeve for protecting large pipework, the sleeve including a fibreglass layer.
Background to the invention
It is common practice to coat large plastic pipework with an intumescent coating to provide some protection to the
pipework in the event of fire and to stop the fire
spreading along the pipework and through wall or floor
apertures through which the pipework extends •
For the intumescent layer to provide the desired
protection, the structural integrity of the pipework must remain in place for a sufficient period of time to allow the intumescent material to expand.
Up until fairly recently, standard plastic pipework with a diameter of up to 250mm had a wall thickness of approximately 8 to 10mm. Pipework with a diameter of over 250mm would typically have a thickness of 18 to 23mm.
However, new ventilated pipework on the market have wall thicknesses of typically around 4 mm. Extensive tests by the applicant have found that a plastic wall of only 4mm thickness melts rapidly and does retain its structural integrity long enough for the intumescent material to take effect.
The applicant has therefore sought ways to preserve the structural integrity of pipework of 4mm thickness long enough for the intumescent layer to expand and stop the fire spreading.
The present invention seeks to provide a solution to the problem with new pipework of reduced thickness by providing a protective sleeve to fit over and around the pipework.
Statement of invention
According to a first embodiment of the invention there is provided a protective sleeve to be fitted over plastic pipework, the sleeve comprising a hollow plastic pipe of larger diameter than the plastic pipework over which it is to be fitted, the outer surface of the plastic pipe having a layer of fibreglass secured thereto, the fibreglass being coated or impregnated with an intumescent material.
Preferably, the plastic pipe has a wall thickness of around 4mm.
Preferably the fibreglass layer has a wall thickness of around 4mm.
Brief description of the drawings
One embodiment of the invention will now be described by way of example only, with reference to the accompanying figures in which:3
Figure 1 is a plan view of circular pipe with a protective sleeve according to the invention; and
Figure 2 is a plan view of a square cross-section pipe with a protective sleeve according to the invention.
Detailed description of preferred embodiments
Referring to figures, a protective for pipework 2 comprises a plastic pipe 4 with an outer layer of fibreglass
The pipe 4 is made from PVC or similar plastics material and has wall thickness of around 4mm (a thickness that has become conventional in ventilation pipework). The pipe 4 is shown in the figures as having a circular cross section. It can though be of any suitable cross-sectional shape .
The fibre glass layer around 4mm in thickness and is coated, otherwise impregnated with an intumescent material.
The fibre glass 6 is adhered or otherwise secured or fixed to the outer surface of the pipe 4. The adhesive may be an intumescent adhesive such as one marketed and distributed by the applicant, and the coating may be an intumescent paint or liquid coating, such as one marketed and distributed by the applicant.
Figure 1 shows the sleeve fitted over ventilation pipework
2A having a square cross section.
Figure 2 shows the fitted over a ventilation pipework 2B having a circular cross section. The ventilation pipework 2 could though be of any cross-sectional shape and dimension suitable to receive a protective sleeve.
In the event of a fire, the inner pipework 2 rapidly melts losing all its structural integrity.
However, during this time the structural integrity of the outer pipe 4 is maintained, due to it having the fibreglass layer 6, for sufficient time to allow the intumescent material to expand.
As the outer pipe 4 softens and melts, the expansion of the intumescent material crushes the fibreglass 6 in on itself to close the hole in the floor or wall through which the pipework 2 extends thereby stopping the spread of the fire along the pipework and through the apertures into neighbouring areas.
It will be understood, that the various embodiments described herein have been described by way of example only and that modifications may be made thereto without departing from the spirit and scope of the present invention as defined in the accompanying claims.

Claims (5)

1. A protective sleeve to be fitted over plastic pipework, the sleeve comprising a hollow plastic pipe of larger diameter than the plastic pipework over which it is to be fitted, the outer surface of the plastic pipe having a layer of fibreglass secured thereto, the fibreglass being coated or impregnated with an intumescent material.
2. A sleeve according to claim 1 wherein the fibreglass layer has a thickness of around 4 mm.
3. A sleeve according to claim 1 or claim 2, wherein the plastic pipe has a wall thickness of around 4 mm.
4. Plastic pipework having a protective sleeve according to any one of claims 1 to 3.
5. Plastic pipework according to claim 4, wherein the pipework comprises at least one pipe having a wall thickness of around 4 mm.
GB1807868.3A 2018-05-15 2018-05-15 Protecting sleeve for pipework Active GB2573769B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1807868.3A GB2573769B (en) 2018-05-15 2018-05-15 Protecting sleeve for pipework

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1807868.3A GB2573769B (en) 2018-05-15 2018-05-15 Protecting sleeve for pipework

Publications (3)

Publication Number Publication Date
GB201807868D0 GB201807868D0 (en) 2018-06-27
GB2573769A true GB2573769A (en) 2019-11-20
GB2573769B GB2573769B (en) 2020-09-09

Family

ID=62623359

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1807868.3A Active GB2573769B (en) 2018-05-15 2018-05-15 Protecting sleeve for pipework

Country Status (1)

Country Link
GB (1) GB2573769B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018983A (en) * 1975-04-09 1977-04-19 Pedlow J Watson Electrical arc and fire protective sheath, boot or the like
US5413828A (en) * 1991-11-07 1995-05-09 Monsanto Europe S.A./N.V. Plastic article having flame retardant properties
US6610399B1 (en) * 2000-11-17 2003-08-26 Structural Technologies, Llc Multi-layer, thermal protection and corrosion protection coating system for metallic tendons, especially for external post-tensioning systems
GB2404232A (en) * 2003-07-23 2005-01-26 Andrew Caselli Internally mounted intumescent sleeve inside pipe section
DE202006008496U1 (en) * 2005-06-01 2006-11-23 J. Van Walraven B.V. Air conditioning duct is fitted with fire-resistant connecting section where it passes through wall which consists of plastic pipe with integral collars, between which sleeve is fitted, which has intumescent material on its inner surface
US20090081435A1 (en) * 2007-09-25 2009-03-26 Samuel Gottfried Fire, heat and high voltage cable protection wrap
CN106352170A (en) * 2016-08-30 2017-01-25 中材金晶玻纤有限公司 Pressure-resistant and high-temperature-resistant glass fiber reinforced plastic pipeline

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018983A (en) * 1975-04-09 1977-04-19 Pedlow J Watson Electrical arc and fire protective sheath, boot or the like
US5413828A (en) * 1991-11-07 1995-05-09 Monsanto Europe S.A./N.V. Plastic article having flame retardant properties
US6610399B1 (en) * 2000-11-17 2003-08-26 Structural Technologies, Llc Multi-layer, thermal protection and corrosion protection coating system for metallic tendons, especially for external post-tensioning systems
GB2404232A (en) * 2003-07-23 2005-01-26 Andrew Caselli Internally mounted intumescent sleeve inside pipe section
DE202006008496U1 (en) * 2005-06-01 2006-11-23 J. Van Walraven B.V. Air conditioning duct is fitted with fire-resistant connecting section where it passes through wall which consists of plastic pipe with integral collars, between which sleeve is fitted, which has intumescent material on its inner surface
US20090081435A1 (en) * 2007-09-25 2009-03-26 Samuel Gottfried Fire, heat and high voltage cable protection wrap
CN106352170A (en) * 2016-08-30 2017-01-25 中材金晶玻纤有限公司 Pressure-resistant and high-temperature-resistant glass fiber reinforced plastic pipeline

Also Published As

Publication number Publication date
GB2573769B (en) 2020-09-09
GB201807868D0 (en) 2018-06-27

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