CA2784649C - Insulation system and method of application thereof - Google Patents

Insulation system and method of application thereof Download PDF

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Publication number
CA2784649C
CA2784649C CA2784649A CA2784649A CA2784649C CA 2784649 C CA2784649 C CA 2784649C CA 2784649 A CA2784649 A CA 2784649A CA 2784649 A CA2784649 A CA 2784649A CA 2784649 C CA2784649 C CA 2784649C
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CA
Canada
Prior art keywords
layer
insulation
jacketing
group
millimeters
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Expired - Fee Related
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CA2784649A
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French (fr)
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CA2784649A1 (en
Inventor
Calvin D. Heyden
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Individual
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Individual
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Priority to CA2784649A priority Critical patent/CA2784649C/en
Priority to PCT/CA2012/001094 priority patent/WO2014019058A1/en
Publication of CA2784649A1 publication Critical patent/CA2784649A1/en
Application granted granted Critical
Publication of CA2784649C publication Critical patent/CA2784649C/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/14Arrangements for the insulation of pipes or pipe systems
    • F16L59/143Pre-insulated pipes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00Layered products having a general shape other than plane
    • B32B1/08Tubular products
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00Tubular articles, e.g. hoses, pipes

Abstract

A system of insulation and jacketing of industrial equipment is provided. The system comprises an insulation layer comprising one or more layers of insulation, applied to an outer surface of the equipment and a jacketing layer applied and adhered to an outer surface of the insulation layer. An outer surface of an outermost layer of insulation is conditioned to form a smooth outer surface and promote adhesion of the jacketing layer to the insulation layer. A method of insulating and jacketing industrial equipment is also provided. The method comprises the steps of applying an insulation layer comprising one or more layers of insulation, to an outer surface of the equipment, conditioning an outer surface of an outermost layer of insulation and applying and adhering a jacketing layer to an outer surface of the insulation layer. Conditioning the insulation layer serves to smoothen the outer surface and promote adhesion of the jacketing layer to the insulation layer.

Description

Insulation System and Method of Application Thereof Field of the Invention The present invention relates to a method of insulating and jacketing a pipe or vessel and to a resulting system of insulation and jacketing for a pipe or vessel.
Background In almost all chemical and industrial applications, vessels and piping carrying process materials need to be insulated or otherwise protected against outside environment. Safety and environmental regulations are also stringent in their requirements that industrial fluids, petrochemicals and waste fluids be stored and transported in complete isolation from the surrounding ecosystems.
The problem of oil or other fluid leakage into surrounding soil, water tables or rivers and lakes is a significant one that results in loss of product, ecosystem damage, loss of reputation in the public eye, fines and even criminal charges.
Vessel jacketing and piping insulation have been used for years for the purposes of insulation and containment.
Such insulation typically involves either a spray or fibre-based insulation applied to a vessel or pipe, optionally with some form of cladding applied overtop.
Very often however, insulation materials are necessarily rough with many air pockets and an uneven surface. Such texture is advantageous for trapping air and insulating, but does not allow for satisfactory adhesion of the cladding. Cladding is required to ensure containment against leaks and must be applied evenly and securely.
The use of spray foam insulations produces a less uneven surface than fibre-based insulation, however it is not suitable for all applications. Conversely, fibre-based insulation result in a very uneven surface and results in poor adhesion for cladding or jacketing or the like.
A need and interest therefore exists in the art to develop improved methods of insulating and jacketing vessels and pipes and for improved systems of insulation and E1397694 DOC,1 1 jacketing.
Summary A system of insulation and jacketing of industrial equipment is provided. The system comprises an insulation layer comprising one or more layers of fiber based insulation applied to an outer surface of the equipment,; an intermediate layer applied to an outer surface of the insulation layer, said intermediate layer selected from the group consisting of a polymer plastic film, a polymer layer and webbing material and a jacketing layer applied and adhered to an outer surface of the intermediate layer. The intermediate layer forms a smooth outer surface and promotes adhesion of the jacketing layer to the insulation layer.
A method of insulating and jacketing industrial equipment is also provided.
The method comprises the steps of applying an insulation layer comprising one or more layers of fiber based insulation to an outer surface of the equipmentõ applying an intermediate layer to an outer surface of the insulation layer; said intermediate layer selected from the group consisting of a polymer plastic film, a polymer layer and webbing material and applying and adhering a jacketing layer to an outer surface of the intermediate layer. Application of the intermediate layer serves to smoothen the outer surface of the insulation layer and promote adhesion of the jacketing layer to the insulation layer.
Brief Description of the Drawings The present invention will now be described in greater detail, with reference to the following drawings, in which:
Figure 1 is perspective view of one embodiment of the present system;
Figure 2 is cross sectional view of one example of the present system;
Figure 3 is a cross-sectional view of one example of an insulated pipe of the present system;
Figure 4 is a cross sectional view of another example of an insulated pipe of the present system;
and E1938842 DOCX,1 E1918704 DOCX,1 2 Figure 5 is schematic diagram of one embodiment of a method of the present invention.
Description of the Invention The present invention relates to a method of insulating and cladding industrial equipment, such as piping and vessels and to an insulation and cladding system for such industrial equipment. More specifically, the present invention relates to a method of cladding or jacketing over fiber-based insulation on industrial equipment such as pipes and vessels. The present method and system provide improved leak resistance and sealing of the industrial equipment body.
For the purposes of the present invention, piping can be any process piping found in industrial facilities, as well as pipelines for transporting process fluids, petroleum and other materials across great distances. Vessels can include storage vessels, reactors, heating and cooling vessels and the like.
Figures Ito 4 have been illustrated with a pipe as one example of the present system, however it would be understood by a skilled person in the art that any type of industrial equipment, including but not limited to pipes and vessels, can be insulated and clad using the systems and methods of the present invention. The insulated and clad system of the invention is generally indicated as 2 in Figure 1. The method of the present invention is generally depicted in Figure 5.
Insulation associated with the present invention can be spray foam insulations, fiber-based insulations and chemical insulations such, for example calcium silicate insulations.
More preferably the present invention relates to methods of jacketing a pipe or vessels covered with a fiber-based insulation. Such fiber-based insulations can include those made with wood fiber, glass fiber, mineral fiber and fibers composed of recycled materials.
Further preferably, the insulating material can be an aerogel. Aerogels are porous solid material made by removing the liquid component of a gel in such a way as to preserve the framework's pore structure. Aerogels can be made from a number of E1397694 DOC,1 3 substances including but not limited to gels of silica, metal oxides, metals, carbon and metal chalcogenide. Most preferably, the insulating material is a silica aerogel.
It is also possible to use pyrogel based insulations, which are high-temperature insulation blankets formed of silica aerogel and reinforced with a fiber batting.
With reference to Figure 3, in a preferred first step of the present method, a pipe or vessel 4 is covered with one or more layers of insulation 6. The layers of insulation 6 may be of the same thickness or of varying thicknesses. The layers of insulation 6 can be sealed along their longitudinal seam 14 using any well-known adhesive in the art, including but not limited to adhesives like Nashua 357 TM adhesive tape. In the case of more than one layer of insulation 6 being applied to the pipe or vessel, sections of insulation bats or blankets are preferably applied in a brickwork pattern, such that the longitudinal seam 14 of inner layers are in misalignment with the longitudinal seams 14 of subsequent layers. Most preferably the seam14 of inner layers is directly opposite to the seams 14 of subsequent layers of insulation.
In an alternate application depicted in Figure 4, insulation 6 can be applied to a pipe or vessel that comprises one or more heat traced lines 16 thereupon. In such cases, the insulation 6 tends to form a void 18 next to the heat trace lines 16. It is preferred in such applications to apply the one or more layers of insulation 6 in such an orientation that the seam 14 of an innermost layer, adjacent the pipe, does not align with the heat trace line 16.
In a most preferred embodiment using aerogel insulation 6, the pipe or vessel can first be coated with a protective seal (not shown) prior to application of the one or more insulation layers 6. As indicated above, any combination of insulation layer thicknesses may be applied in any order to achieve a final desired insulation thickness.
For example, in the case of aerogel or of pyrogel insulation 6 applications, the insulation 6 is applied as a 15 mm layer comprising an innermost insulation layer of 5 mm thickness, covered by an outer insulation layer of 10 mm thickness.
Alternatively, a total 20 mm layer of insulation 6 can be applied by applying two 10 mm thick insulation layers. Further alternatively, a total 30 mm layer of insulation 6 can be applied by E1397694 DOC,1 4 applying three 10 mm layers to the pipe or vessel.
In all cases of applying more than one layer of insulation 6, the longitudinal seam 14 of an inner layer of insulation is preferably misaligned with the longitudinal seam 14 of a subsequent outer layer of insulation. Most preferably the seam 14 of a subsequent outer layer lies diametrically opposite to the longitudinal seam 14 of an inner layer of insulation, to thereby follow a 'brickwork' pattern of application.
Once the one or more layers of insulation 6 have been applied, an outer surface of the outermost insulating layer is treated, coated or otherwise conditioned to provide a smooth surface upon which cladding or jacketing can be applied and adhered.
In one preferred embodiment, an intermediate layer 8 is applied overtop the outermost insulation layer 6. The intermediate layer 8 provides a smooth surface and serves to even out and eliminate surface irregularities 12 typically found in the insulation layer, such as fabric nests. The intermediate layer 8 is preferably in the form of a high temperature tolerant polymer plastic film including but not limited to cross-linked or non-cross-linked polyolefin, cross-linked or non-cross-linked PVC. Such polymer plastic films are often commercially called shrink wrap. More preferably such polymer plastic film can be applied in a thickness ranging from about 0.05 millimeters to about 0.10 millimeters and is most preferably 0.08 millimeters in thickness.
Alternatively, a layer of polymer layer can be applied as the intermediate layer 8 to the outermost insulation layer 6 to smoothen the insulation surface. The polymer layer can be glued or applied and affixed by any suitable means known in the art. Such polymer layer is more preferably similar to those used in the construction industries as vapour barriers and the like. Polymer layer is preferred in cases where pipes or vessels 4 are not easily accessible, for example in cases when lower surfaces of the pipes or vessels are close to the ground or other equipment.
In another embodiment, a webbing material or tape can be applied and then El 938842 DOCX,1 El 91 8704 DOCX,1 sprayed with a suitable polymer spray to form the intermediate layer 8. Such webbing material, can be, for example a fiberglass cross-linked tape or web sprayed with a polymer-based spray. In a most preferred example, such a webbing material is drywall tape.
In a further alternate embodiment, particularly in the case of the use of spray foam insulation as the insulation layer 6, the outermost layer of insulation 6 can be re-surfaced, treated, trimmed or otherwise conditioned to smoothen its outer surface. In one preferred embodiment, the outer surface of the insulation is run through a lathe to produce a smooth outer surface and even insulation thickness along the length of pipe The surface smoothening provided by the intermediate layer 8 allows for a cladding or jacketing 10 to be applied to the insulated pipe or vessel 4, to protect the insulation layer 6 and to provide containment in the case of leaks. The intermediate layer 8 advantageously provides a smooth surface for better adhesion of a jacketing or Alternatively, a blanket comprising polyurea with a fabric backing can also be applied over the intermediate layer 8 and sealed in place by any suitable adhesive known in the art and most preferable by a spray adhesive into a longitudinal seam 14 of lower surface of the pipes or vessels are close to the ground or other equipment.
The thickness of the jacket 10 is preferably in the range of about 60 to about mm, and is most preferably about 120 mm in thickness for piping and vessels.
E1397694 DOC,1 6 The thickness of the jacket 10 can be verified by any known means in the art.
Commonly, thickness is tested by a destructive test of cutting the jacket 10 at varying locations along the pipe or vessel 4 and use of a thickness gauge, such as for example a dry film thickness or ultrasound gauge, to measure thickness of the jacketing layer 10. A
visual or other suitable inspection technique can also be used to inspect for pinholes or undercuts in the jacketing layer. Should imperfections exist or if the jacket does not meet a minimum desired thickness, further layers of jacketing material can be sprayed or otherwise applied to the existing jacketing layer.
Preferably, the insulated, wrapped and jacketed equipment is cured for between 1 to 2 hours without disturbance.
In the foregoing specification, the invention has been described with a specific embodiment thereof; however, it will be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention.
E1397694 DOC,1 7

Claims (33)

1. A system of insulation and jacketing of industrial equipment, said system comprising:
a) an insulation layer comprising one or more layers of fiber-based insulation applied to an outer surface of the equipment;
b) an intermediate layer applied to an outer surface of the insulation layer, said intermediate layer selected from the group consisting of a polymer plastic film, a polymer layer and webbing material; and c) a jacketing layer applied and adhered to an outer surface of the intermediate layer, said jacketing layer being selected from the group consisting of polymers and polyelastomers, wherein an outer surface of the intermediate layer forms a smooth outer surface and promote adhesion of the jacketing layer to the insulation layer.
2. The system of claim 1, wherein the industrial equipment is selected from the group consisting of pipes, vessels, heat exchangers, reactors and tanks.
3. The system of claim 1, wherein the fiber-based insulation is selected from the group consisting of wood fiber insulations, glass fiber insulations, mineral fiber insulations, an aerogels and pyrogel based insulations.
4. The system of claim 3, wherein the aerogel insulation is selected from the group consisting of aerogels of silica, aerogels of metal oxides, aerogels of metals, aerogels of carbon and aerogels of metal chalcogenide.
5. The system of claim 4, wherein the aerogel insulation is silica aerogel insulation.
6. The system of claim 1, wherein fiber-based insulation is pyrogel.
7. The system of claim 1, wherein the insulation is applied in more than one layer.
8. The system of claim 7, wherein the more than layer of insulation is applied in a brickwork pattern.
9. The system of claim 1, wherein the insulation layer has a thickness of from 10 millimeters to 30 millimeters
10. The system of claim 1, wherein the polymer plastic film is selected from the group consisting of cross-linked polyolefins, non-cross-linked polyolefins, cross-linked PVC
and non-cross-linked PVC.
11. The system of claim 10, wherein the polymer plastic film has a thickness of from 0.05 millimeters to 0.10 millimeters.
12. The system of claim 1, wherein the webbing material is a fiberglass cross-linked tape or web sprayed with a polymer-based spray.
13. The system of claim 1, wherein the jacketing layers is selected from the group consisting of polyurea and polyurethane.
14. The system of claim 13, wherein the jacketing layer is selected from the group consisting of sprayable liquids, brushable liquids, blankets and bats.
15. The system of claim 14, wherein the jacketing layer is sprayable liquid polyurea.
16. The system of claim 14, wherein the jacketing layer comprises a solid blanket comprising polyurea and a fabric backing.
17. The system of claim 1, wherein the jacket layer has a thickness of from 60 millimeters to 250 millimeters.
18. A method of insulating and jacketing industrial equipment, said method comprising the steps of:
a) applying an insulation layer comprising one or more layers of fiber-based insulation to an outer surface of the equipment;
b) applying an intermediate layer to an outer surface of the insulation layer;
said intermediate layer selected from the group consisting of a polymer plastic film, a polymer layer and webbing material; and c) applying and adhering a jacketing layer to an outer surface of the intermediate layer, said jacketing layer being selected from the group consisting of polymers and polyelastomers, wherein application of the intermediate serves to smoothen the outer surface of the insulation layer and promote adhesion of the jacketing layer to the insulation layer.
19. The method of claim 18, wherein the fiber-based insulation is selected from the group consisting of wood fiber insulations, glass fiber insulations, mineral fiber insulations, an aerogels and pyrogel based insulations.
20. The method of claim 19, wherein the aerogel insulation is selected from the group consisting of aerogels of silica, aerogels of metal oxides, aerogels of metals, aerogels of carbon and aerogels of metal chalcogenide.
21. The method of claim 20, wherein the aerogel insulation is silica aerogel insulation.
22. The method of claim 19, wherein fiber-based insulation is pyrogel.
23. The method of claim 18, wherein the insulation is applied in more than one layer.
24. The method of claim 23, wherein the more than layer of insulation is applied in a brickwork pattern.
25. The method of claim 18, wherein the insulation layer has a thickness of from 10 millimeters to 30 millimeters
26. The method of claim 18, wherein the polymer plastic film is selected from the group consisting of cross-linked polyolefins, non-cross-linked polyolefins, cross-linked PVC and non-cross-linked PVC.
27. The method of claim 26, wherein the polymer plastic film has a thickness of from 0.05 millimeters to 0.10 millimeters.
28. The method of claim 18, wherein the webbing material is a fiberglass cross-linked tape or web sprayed with a polymer-based spray.
29. The method of claim 18, wherein the jacketing layers is selected from the group consisting of polyurea and polyurethane.
30. The method of claim 29, wherein the jacketing layer is selected from the group consisting of sprayable liquids, brushable liquids, blankets and bats.
31. The method of claim 30, wherein the jacketing layer is sprayable liquid polyurea.
32. The method of claim 18, wherein the jacketing layer comprises a solid blanket comprising polyurea and a fabric backing.
33. The method of claim 18, wherein the jacket layer has a thickness of from 60 millimeters to 250 millimeters.
CA2784649A 2012-08-03 2012-08-03 Insulation system and method of application thereof Expired - Fee Related CA2784649C (en)

Priority Applications (2)

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CA2784649A CA2784649C (en) 2012-08-03 2012-08-03 Insulation system and method of application thereof
PCT/CA2012/001094 WO2014019058A1 (en) 2012-08-03 2012-11-23 Insulation system and method of application thereof

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Application Number Priority Date Filing Date Title
CA2784649A CA2784649C (en) 2012-08-03 2012-08-03 Insulation system and method of application thereof

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CA2784649C true CA2784649C (en) 2014-07-08

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Publication number Priority date Publication date Assignee Title
CN104373763A (en) * 2013-08-12 2015-02-25 苏州维艾普新材料股份有限公司 Vacuum insulation panel produced from core material of porous structure and production method of vacuum insulation panel
CN104390100A (en) * 2014-10-31 2015-03-04 无锡同心塑料制品有限公司 Heat-insulating pipeline
CN204493928U (en) * 2015-01-09 2015-07-22 浙江鑫宙竹基复合材料科技有限公司 A kind of thermosetting bamboo wood composite pipe

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