US3415287A - Protective covering and article - Google Patents

Protective covering and article Download PDF

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Publication number
US3415287A
US3415287A US391090A US39109064A US3415287A US 3415287 A US3415287 A US 3415287A US 391090 A US391090 A US 391090A US 39109064 A US39109064 A US 39109064A US 3415287 A US3415287 A US 3415287A
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United States
Prior art keywords
mastic
coating
pipe
present
antitack
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US391090A
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English (en)
Inventor
Heslop William Rosse
Vincent L Lanza
Edward C Stivers
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Raychem Corp
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Raychem Corp
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Publication date
Application filed by Raychem Corp filed Critical Raychem Corp
Priority to US391090A priority Critical patent/US3415287A/en
Priority to SE10722/65A priority patent/SE335081B/xx
Priority to GB35850/65A priority patent/GB1116879A/en
Priority to BE668616A priority patent/BE668616A/xx
Priority to DE19651504803 priority patent/DE1504803A1/de
Priority to NL656510948A priority patent/NL141811B/xx
Priority to CH1175065A priority patent/CH450236A/de
Priority to FR29062A priority patent/FR1469479A/fr
Priority to US720004A priority patent/US3539411A/en
Application granted granted Critical
Publication of US3415287A publication Critical patent/US3415287A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/1806—Heat shrinkable sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/0608—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
    • B29C61/0616—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms layered or partially layered preforms, e.g. preforms with layers of adhesive or sealing compositions
    • 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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints
    • F16L13/0254—Welded joints the pipes having an internal or external coating
    • F16L13/0272—Welded joints the pipes having an internal or external coating having an external coating
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/20—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
    • F16L47/22—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics using shrink-down material
    • 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
    • F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
    • F16L58/1063—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being a sheet wrapped around 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
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
    • F16L58/181—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for non-disconnectible pipe joints
    • 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
    • F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00—Electricity: conductors and insulators
    • Y10S174/08—Shrinkable tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/915—Mastic

Definitions

  • ABSTRACT OF THE DISCLOSURE Means for covering pipes or other substrates comprising a heat recoverable member having an adhesive material which is tacky at normal temperature on one side thereof and an anti-tack coating which is soluble in the adhesive at the recovery temperature of the heat recoverable member and covering said tacky adhesive so that the non-tacky surface is exposed.
  • This covering means may be used to cover pipes or other substrates by positioning the covering means adjacent to the substrate and applying heat such that the heat recoverable member changes dimension and forces the adhesive and dissolved anti-tack coating into contact with the substrate to produce a covered article in which the forces exerted on the adhesive by the heat recoverable member and the substrate will cause the adhesive to till any holes or abrasions which may be made in the outer surface of the covering.
  • the present invention relates to a means and process for protecting pipe and similar articles against corrosion and other damage by applying a protective coating thereto.
  • the present invention relates to a means and process which are particularly suitable for protecting pipe joints and the like, but which have a wide variety of other applications.
  • this coating is a hard, abrasion resistant, electrically insulative plastic, e.g., vinyl polymers such as polyvinyl chloride, polyethylene, cellulose esters such as cellulose acetate or cellulose acetate butyrate, copolymers such as copolymers of ethylene and alkyl acrylates, etc.
  • It is a further object of the present invention to provide a means for applying protective coating to pipes and pipe joints comprising a heat dimensionally unstable article, a owable viscous material and an antitack coating over the viscous material, the antitack coating going into solution in the viscous material under the temperature conditions at which the dimensionally heat unstable article can be caused to change dimension and the use thereof.
  • Still another object of the present invention is to provide a means for applying a protective coating to pipes and pipe joints comprising an elastic memory material, a mastic-type coating on at least one surface of the elastic memory material and a wax antitack coating covering the mastic-type material, the Wax going into solution in the mastic-type material under the temperature conditions at which the elastic memory material undergoes recovery and the use thereof.
  • the present invention comprises a means suitable for functioning as a protective coating for pipes and pipe joints comprising a dimensionally heat unstable member, a mastic-type viscous material which is fiowable at ordinary temperatures under the pressure exerted by the dimensionally heat unstable member on at least one surface of the dimensionally heat unstable member, and an antitack coating covering the mastic-type material which antitack coating goes into solution in the mastictype material under the temperature conditions at which the dimensionally heat unstable member undergoes recovery and remains in solution at service temperature.
  • This means may be applied to a pipe joint which it is desired to protect by sliding the means along the pipe until it is positioned adjacent to the exposed joint.
  • the body of the pipe will, of course, already have been provided with a protective coating, usually an extruded coating.
  • Heat is then applied to the means of the present invention to cause the dimensionally heat unstable member to change dimension in such a manner as to urige the mastic-type material toward the pipe joint
  • the pipe is preheated immediately before the means of the present invention is applied, particularly when external coverings are applied to large diameter pipes, eg., on the order of three feet.
  • the antitack coating goes into solution in the mastic-type material under these temperature conditions and will dissolve into the mastic-type material without substantially affecting the properties thereof and remain-s in solution at service temperature.
  • the means of the present invention will often be tubular in shape with the mastic-type coating being provided on the inner surface thereof and the antitack coating covering the mastic-type coating. However, it may also Ibe a tape capable of being wound around the article to be protected or may have any other suitable shape.
  • the means of the present invention is also preferably provided with a longitudinal dimension lsufficient to cause it to overlap with the -protective covering already present on the pipe in Such a manner as to effectively bond the means of the present invention to a portion of the existing protective coating as well as the exposed metal portion of the pipe and joint.
  • the dimensionally heat unstable member of the means of the present invention continues to apply pressure to the mastic-type material after the means of the present invention has been installed due to residual internal stresses generated by phase change to the crystalline state caused by the recovery process and to the difference in coefficient of thermal expansion between the dimensionally heat unstable member and the pipe,
  • This continued application of pressure imparts a highly effective self-sealing capability to the means of the present invention after it has been installed since it causes the mastic-type material to flow into any puncture or hole which may be made in the protective covering.
  • the mastic-type material is selected so as to be capable of -owing at service temperatures such as room temperature and substantially lower temperature as llow as C. and lower under the pressure exerted by the dimensionally heat unstable member after installation of the means of the present invention on a pipe or pipe joint. In this regard, it has been found desirable to use mastictype materials which are thixotropic.
  • FIGURE l is a transverse cross section of the means of the present invention.
  • FIGURE 2 illustrates the manner in which the means of the present invention may be positioned over a pipe joint preparatory to providing a protective covering thereon.
  • FIGURE 3 illustrates a pipe joint after a protective covering has been applied according to the present invention.
  • FIGURE 4 illustrates a pipe which has been provided with an internal protective covering according to the present invention.
  • the means of the present invention comprises a dimensionally heat unstable member 11, the inner Isurface of which is provided with mastictype material 12.
  • Antitack coating 13 is provided over mastic-type material 12.
  • Antitack coating 13 is an essential part of the present invention because in the absence of this coating it has been ⁇ found that the extremely strong adhesive properties of mastic-type coating 12 result in making it almost impossible to slide a tubular member having a mastic coating on its inner surface along a pipe of any substantial length without the mastic sticking to the outer surface of the pipe and causing the mastic to be removed from the inner surface of the tubular member and/ or causing the tubular member to adhere to the outer surface of the pipe at a location where such adhesion is not desired.
  • the primary difficulty presented by any attempt to provide the mastic-type material 12 with an antitack coating is that such a coating, by its very nature, would be expected to interfere with the adhesive properties of the mastic-type material -at the time when it is desired to cause the mastic-type material to adhere to a pipe joint or the like.
  • the antitack coating must effectively prevent the mastic material from adhering to other objects while the protection means is in storage and while the protection means is ⁇ being positioned over the joint by sliding it along the length of the pipe and at the same time must not interfere with the adhesion of the mastic to the pipe joint when the protective covering is actually applied.
  • One of the primary contributions of the present invention is the use of suitable waxes as an antitack coating. lt has been found that Some waxes will provide eective antitack properties at ordinary temperatures and also go into solution in mastic under the temperature conditions at which dimensionally heat unstable materials undergo recovery. Thus, there is a unique and unexpected threeway c-oaction between the dimensionally heat unstable member, mastic-type material and wax antitack coating of the means of the present invention.
  • a material having the property of elastic memory such as that disclosed in United States Patent Number 3,086,242 as the dimensionally heat unstable member 11.
  • materials having the property of elastic memory are dimensionally heat unstable and may be caused to change shape and/ or dimension simply by the application of heat.
  • Elastic memory may be imparted to polymeric materials by first extruding or otherwise molding the polymer into a desired shape.
  • the polymer is then cross-linked or given the properties of a cross-linked material by exposure to high energy radiation, eg., a high energy electron beam, initiation of cross-linking by exposure to ultra-violet irradiation, or by chemical means, eg., peroxides ⁇ when polyolefins are used.
  • high energy radiation eg., a high energy electron beam
  • initiation of cross-linking by exposure to ultra-violet irradiation or by chemical means, eg., peroxides ⁇ when polyolefins are used.
  • the cross-linked polymeric material is then heated and deformed and then locked in the deformed condition by quenching or -other suitable cooling or, in the alternative, the same process can be accomplished at room temperature by using greater force to deform the polymer.
  • the deformed material will retain its shape almost indefinitely until exposed to a temperature sufficient to cause recovery, e.g., approximately 250 F. in the case of polyethylene.
  • polymers which may be so processed are polyoleiins such as polyethylene and polypropylene, polyamides, polyurethanes, polyvinylchloride, polyvinylideneuoride, and elastomeric materials such as elastomeric polyurethanes and those disclosed in copending application Ser. No. 65,953, tiled Oct. 31, 1960, the disclosure of which is incorporated by reference herein.
  • the property of elastic memory may also be imparted to materials having the properties of cross-linked polymers such as polytetrauoroethylene and very high molecular weight polyolens or vinyl polymers such as polyvinyl chloride. While elastic memory materials such as those described above are preferred for use in the present invention, it is to be understood that other dimensionally heat unstable materials such as those disclosed in United States Patent No. 2,027,962 may be used.
  • Example I A protection means of the present invention was prepared by providing the inner surface of an irradiated polyethylene tube having an inside diameter of 1.55 inches with a coating of mastic (67l8-31F manufactured by Farboil Company) having a thickness of 20 mils.
  • the irradiated polyethylene possessed the property of elastic memory such that it would decrease in diameter upon the application of suicient heat and had a recovery temperature of 275 F.
  • a coating of approximately 0.0005 inch of wax was applied over the mastic.
  • the resultant wax lm was virtually invisible, tack free and imparted an even gloss to the mastic.
  • the wax used was Trewax-nonslip liquid floor wax and contained carnauba wax as 70% of the total solids.
  • this protective means comprising polyethylene 11, mastic 12 and wax 13 was positioned over a joint between pipes 14 and 15. As shown in FIGURE 2, there is a clearance between the protective means and the pipe to permit easy positioning of Ithe protective means.
  • Pipes 14 and 15 were standard commercial pipes which had been provided with protective coatings 16 and 17, respectively, yby extruding polyethylene over an initial mastic coating l(not shown) on the pipe.
  • Such protected pipe is available commercially as X-Tru-Coat pipe (manufactured by Republic Steel Corporation) and is believed to be the most economically satisfactory protected pipe presently avail-able.
  • Polyethylene tube 11 was one foot long while the exposed metal pipe surface had an axial length of four inches.
  • the pipe was preheated to approximately 220 F. for 45 seconds before the protective sleeve was positioned in the manner illustrated in FIGURE 2.
  • the assembly illustrated in FIGURE 2 was then exposed to a temperature of 275 F'. thereby causing polyethylene tube 11 to recover around pipes 14 and 15, and around weld 18. Under these temperature conditions, wax 13 was completely dissolved by mastic 12.
  • the recovered polyethylene t-ube tightly gripped existing protective coverings 16 ⁇ and 17 and the exposed portions of pipes 14 and 15 with mastic 12 ⁇ lilling all spaces between polyethylene tube 11 and the remaining elements of the assembly.
  • the protected pipe joint prepared as described immediately above was then subjected to a comparison test with Ia length of X-Tru-Coat pipe without any splice and a length of such pipe in which the joint was protected with a mastic coated polyethylene tape wound around the joint, such tape being available commercially as X-Tru- Tape.
  • a mastic coated polyethylene tape wound around the joint such tape being available commercially as X-Tru- Tape.
  • a 0.04 inch diameter hole and a 1/32 inch wide slit two inches long were made in each specimen so that bare metal was exposed.
  • the pipe ends were then sealed with rubber Stoppers and dipped in hot wax to form an electrically insulative coating and the specimens were immersed in tap Water.
  • Example II A length of polyethylene tubing which had been irradicated to a dose of 15 megarads and which had been given the property of elastic memory such that it would increase in diameter upon the application of sufficient heat was provided with an outer coating of mastic (Johns-Manville Asbestos Fibrous Roof and Foundation Coating).
  • polyethylene tubing had an outside diameter of 2.015 inches and the mastic layer was 20-30 mils thick.
  • the mastic coating was provided with an outer coating of approximately 0.0005 inch of wax which imparted a tack-free surface on the mastic.
  • the wax used was Trewax-nonslip liquid oor wax.
  • the coated polyethylene tubing was then inserted into a length of aluminum pipe having an inside diameter of 2.082 inches. This assembly was then heated such that the tubing was exposed to a temperature of 575 F. until the tubing expanded and forced the Wax was completely dissolved by the mastic. As illusof the aluminum pipe. Under these temperature conditions, the was was completely dissolved by the mastic.
  • the pipe 18 was thus provided with an effective protective lining comprising mastic 19 which had wax dissolved therein and expanded polyethylene tube 20.
  • Example III The protection means of the present invention is most suitable for protecting pipes and the like having large diameters as well as small diameters.
  • a steel pipe having an outside diameter of 36 inches was provided with a protective covering.
  • the protection means used in this example comprised an irradiated polyethylene tube having an inside diameter of 38 inches with a coating of mastic (6718-3113, manufactured by Farboil Company).
  • the irradiated polyethylene possessed the property of elastic memory such that it would decrease in diameter upon the application of suicient heat and had a recovery temperature of 275 F.
  • a coating of appropriately 0.0005 inch of wax was applied over the mastic.
  • the resultant wax coated mastic was tack free.
  • the wax used was Trewax-non-slip liquid lloor wax.
  • This protection means was six inches wide and was positioned over a section of bare pipe.
  • the pipe was preheated for 45 seconds to a temperature of approximately 220 F. before the protective sleeve was positioned and the assembly was then exposed to a temperature of 275 F. thereby causing the polyethylene tube to recover around the pipe. Under these temperature conditions, the wax was completely dissolved by the mastic.
  • the recovered polyethylene tube tightly gripped the pipe with the mastic filling all of the spaces between the inner surface of the polyethylene tube and the outer surface of the pipe.
  • the present invention possesses other advantages in addition to those already discussed herein.
  • One such advantage is the function of the Wax coating 13 to inhibit oxidation of mastic 12 during storage. It has been found that exposure of mastic to the atmosphere for substantial periods of time results in oxidation of the mastic which in turn has an adverse effect on the properties of the mastic, particularly the adhesive properties thereof. This deterioration due to oxidation is particularly acute when storage is at moderately elevated temperatures as often occurs in conventional industrial practice. Wax coatings such as that described in the preceding examples which are stable at temperatures up to F. and higher, effectively inhibit this oxidative deterioration.
  • the present invention may be used to to provide protective coverings on internal surfaces as described in Example II.
  • the means of the present invention may be used to provide a protective covering over the internal surface of a pipe or pipe joint in those instances where a protective covering is desirable, e.g., where the entire internal surface of a pipe is provided with a protective covering to render it suitable for conveying corrosive liquids which would attack exposed metal surfaces.
  • the difference in coefficient of thermal expansion between the recoverable member and the pipe tends to cause the pipe and lining to separate but the mastic performs the highly desirable function of maintaining an effective bond between the two.
  • the mastic preferred for use in the present invention is a mixture of reclaimed rubber and asphaltic-based material made from the distillation of coal or petroleum products.
  • the -mastics used should be thermoplastic, and should be thixotropic such that the viscosity thereof decreases with increases in shear. Mastics having viscosities of up to about 1013 centipoise at 25 C. have been found suitable for use in the present invention, but even more viscous materials could be used if they were suiciently thixotropic such that they would flow at ordinary temperatures under the pressure exerted by the dimensionally heat unstable member which forms a part of the protection means of the present invention.
  • the viscosity of the mastic at the recovery temperature of the dimensionally heat unstable member is preferably in the range of 103 to 106 centipoise.
  • the softening point of the mastic, as measured by the ring and ball technique, is preferably in the range of 40 to 80 C.
  • the interfacial tension of the mastic should be low and preferably on the order of to 40 ergs per square centimeter.
  • the water absorption of the mastic should be low.
  • the mastic-type substances which are most satisfactory for the present invention are materials which are quite tacky and sticky at room temperature. This stickiness or tackiness at room temperature is highly desirable since it enhances adhesion of the protection covering to the pipe.
  • the sticky or tacky nat-ure of the mastic-type material represents a major problem in the fabrication, shipping and installation of articles of the type of those of the present invention. It often occurs that long periods of time must elapse between the coating of a dimensionally heat unstable member with mastic and the eventual installation of the dimensionally heat unstable member on a pipe, pipe joint or the like.
  • a major contribution of the present invention is therefore to place an antitack coating over the mastic-type material.
  • This antitack coating must have several properties. Perhaps the most important of these properties is that of going into solution in the mastic material under the temper-ature conditions at which the dimensionally heat unstable member undergoes recovery remaining in solution at service temperatures.
  • the antitack coating hrnust be miscible with the mastic material, and yet yat or near room temperature its rate of solubi'ltiy into the mastic must be extremely low so as to assure a long effective life for the antitack coating.
  • the antitack material is ⁇ dissolved into the mastic during recovery, it must not interfere with the adhesive properties of the mastic.
  • wax-rosin mixtures particularly beeswax-rosin mixtures are effective.
  • Other waxes which are contemplated for use in the present invention are ouricury, candelil'la and palm waxes.
  • the wax is applied to the mastic in the 4form of an emulsion.
  • the wax emulsion will form a clear, transparent lm upon drying.
  • the antitack coating must of itself yand in combination with the mastic be noncorrosive.
  • the melting point of the antitack material may be chosen at will, the choice depending upon the shelf life requirement of the antitack coating and the time and temperature conditions which will be used to cause the dimensionally heat unstable member to undergo recovery. In general, since the time for recovery of many dimensionally heat unstable members will lbe quite short, antitack materials of relatively low molecular -weight are preferred.
  • an emulsion vcomprising parts water, three parts polyvinyl alcohol, 0.5 part sodium lauryl sulphate and 50 parts beeswaxrosin mixture, all parts being by weight, is most suitable for use in the present invention.
  • the proportions of beeswax and rosin may be varied with increasing amounts of beeswax tending to reduce the shelf life at F. of the antitack coating.
  • a beeswax-rosin mixture comprising 60% beeswax and 40% rosin has been found to provide excellent shelf life characteristics and good adhesion characteristics of the mastic after recovery.
  • the adhesion characteristics after recovery improve with increasing amounts of beeswax and a 70-30 mixture has been found to give fair shelf life (slight tackiness 'after one week) at 120 F. and excellent adhesion after recovery.
  • the thickness of the antitack coating should be at least about 0.0001 inch and for most purposes, coatings of more than 0.02 .inch are not required. HOW- ever,'even thicker wax coatings may be required for particular uses or for particularly large articles for asymmetrical or oddly shaped articles.
  • the thickness of the mastic coating on the protection means of the present invention may vary within wide limits depending upon the s ize of the article which it is desired to protect. For example, an inside mastic coating having a thickness of 0015-0020 inch has been found preferable for recoverable members having an expanded inside. diameter of about 1.5 inches while a thickness of 002-0025 inch has been found preferable for recoverable members having expanded inside diameters of about 2-3 inches. Outside mastic coatings on expandable articles of the same size may be substantially thicker. However, even very thin coatings of mastic have been found to function in a reasonably satisfactory manner. For example, in certain circumstances coatings as thin as 0.003 inch have been effective.
  • a tubular article suitable for functioning as a protective covering comprising a dimensionally heat unstable member comprising a memory material, at least one surface of said dimensionally heat unstable member being provided with a coating of mastic, said mastic being covered over its entire exposed surface by an antitack coating said antitack coating comprising a wax which goes into solution in said mastic under the temperature conditions at which said dimensionally heat unstable member will undergo a change in dimension.
  • a tubular article suitable for functioning as a protective covering comprising a dimensionally heat unstable member, said dimensionally heat unstable member comprising an elastic memory material, said dimensionally heat unstable member being provided with a coating of mastic on at least one surface thereof, said mastic being covered over its entire exposed surface with an antitack coating, said antitack coating comprising a wax which goes into solution in said mastic under the temperature conditions at which said dimensionally heat unstable member may be ⁇ caused to undergo a change in dimension.
  • An article su-itable for functioning as a protective coating comprising a dimensionally heat unstable member, said member comprising a memory material tubular and .being capable of contracting radially inwardly upon being exposed to heat at its recovery temperature, the internal surface of said member being provided with a mastic coating, said mastic coating being covered over its entire exposed surface with an antitack coating, said antitack coating comprising a wax which goes rinto solution in said mastic under the temperature conditions at which said dimensionally heat vunstable member undergoes recovery.
  • a tubular article suitable for functioning as -a protective covering comprising a dimensionally heat unstable member, said member comprising an irradiated polyoleiin having the property of elastic memory, at least one surface of said dimensionally heaty unstable member being provided with a mastic coating, said mastic coating being covered over its entire exposed surface with an antitack coating, said antitack coating comprising a wax capable of going into solution in said mastic under the temperature conditions at which said dimensionally heat unstable member will undergo a change in dimension.
  • said elastic memory material comprises a copolymer of ethylene and an alkyl acrylate.
  • An article suitable for functioning as a protective coating comprising a dimensionally heat unstable member comprising a memory material, said member being tubular and being capable of expanding radially outwardly upon being exposed to heat at its recovery temperature, the external surface of said member being provided with a mastic coating, said mastic coating being covered over .its entire exposed surface with an antitack coating, said antitack coating comprising a wax which goes into solution in said mastic under the temperature conditions at which said dimensionally heat unstable member undergoes recovery.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
US391090A 1964-08-21 1964-08-21 Protective covering and article Expired - Lifetime US3415287A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US391090A US3415287A (en) 1964-08-21 1964-08-21 Protective covering and article
SE10722/65A SE335081B (fr) 1964-08-21 1965-08-17
BE668616A BE668616A (fr) 1964-08-21 1965-08-20
DE19651504803 DE1504803A1 (de) 1964-08-21 1965-08-20 Material und Verfahren zum Schutz von Rohrleitungen von Korrosion
GB35850/65A GB1116879A (en) 1964-08-21 1965-08-20 Protective covering and article
NL656510948A NL141811B (nl) 1964-08-21 1965-08-20 Bekledingsmateriaal en tegen corrosie beschermde pijp.
CH1175065A CH450236A (de) 1964-08-21 1965-08-20 Ueberzugsmanschette und ihre Verwendung
FR29062A FR1469479A (fr) 1964-08-21 1965-08-21 Pièce de recouvrement et procédé de protection d'objets métalliques enterrés contre la corrosion
US720004A US3539411A (en) 1964-08-21 1967-12-07 Process for protectively covering substrate articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US391090A US3415287A (en) 1964-08-21 1964-08-21 Protective covering and article

Publications (1)

Publication Number Publication Date
US3415287A true US3415287A (en) 1968-12-10

Family

ID=23545192

Family Applications (1)

Application Number Title Priority Date Filing Date
US391090A Expired - Lifetime US3415287A (en) 1964-08-21 1964-08-21 Protective covering and article

Country Status (8)

Country Link
US (1) US3415287A (fr)
BE (1) BE668616A (fr)
CH (1) CH450236A (fr)
DE (1) DE1504803A1 (fr)
FR (1) FR1469479A (fr)
GB (1) GB1116879A (fr)
NL (1) NL141811B (fr)
SE (1) SE335081B (fr)

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631898A (en) * 1970-01-13 1972-01-04 Alfred H Harley Insulating pipe joint fitting and method of making same
US3744823A (en) * 1971-03-01 1973-07-10 Shaw Pipe Ind Ltd High temperature pipeline joints
US3814139A (en) * 1972-08-23 1974-06-04 Stone Ind Corp Insulating connector
US3877490A (en) * 1972-07-25 1975-04-15 Nippon Kokan Kk Steel pipes provided with plastic coatings
US3908267A (en) * 1972-08-23 1975-09-30 Stone Ind Corp Method of applying an insulating connector
US3957382A (en) * 1973-06-11 1976-05-18 Raychem Corporation Method of processing fusible inserts
US4035534A (en) * 1972-09-01 1977-07-12 Raychem Corporation Heat-shrinkable laminate
US4070044A (en) * 1976-01-22 1978-01-24 Phillips Petroleum Company Polymer pipe connection and method to make it
US4075752A (en) * 1971-11-20 1978-02-28 Robert Bosch Gmbh Method of making distributor assembly bearing structures and the like
DE2647122A1 (de) * 1975-06-16 1978-04-27 Raychem Corp Rueckstellbare muffe sowie ihre verwendung und herstellung
US4135553A (en) * 1975-06-16 1979-01-23 Raychem Corporation Recoverable sleeve
US4168192A (en) * 1972-09-01 1979-09-18 Raychem Corporation Process for making recoverable tubular article
US4188979A (en) * 1975-08-26 1980-02-19 Nitto Denki Kogyo Kabushiki Kaisha Protective cover for a thermoresponsive tube
US4207364A (en) * 1972-09-01 1980-06-10 Raychem Corporation Heat-shrinkable laminate
USRE30447E (en) * 1972-08-23 1980-12-16 J. L. Clark Manufacturing Co. Insulating connector
USRE30817E (en) * 1972-08-23 1981-12-08 J. L. Clark Manufacturing Co. Method of applying an insulating connector
US4374881A (en) * 1981-03-24 1983-02-22 Eaton Corporation Heat recoverable connector
EP0079610A1 (fr) * 1981-11-18 1983-05-25 Ube Industries, Ltd. Procédé pour former une couche protectrice à la jonction entre tubes d'acier noir couverts
US4424990A (en) 1980-01-30 1984-01-10 Raychem Corporation Thermochromic compositions
US4450871A (en) * 1981-04-21 1984-05-29 Sumitomo Electric Industries, Ltd. Heat-shrinkable tubes
US4465309A (en) * 1981-08-13 1984-08-14 Umac, Inc. Connecting or repair device
US4549752A (en) * 1981-08-13 1985-10-29 Umac, Inc. Connector for tubular members
EP0172039A2 (fr) * 1984-08-17 1986-02-19 Raychem Limited Article polymère renforcé par fibres
EP0173541A2 (fr) * 1984-08-22 1986-03-05 Raychem Gmbh Procédé pour la production d'un dispositif d'étanchéité d'un conduit
US4693501A (en) * 1986-07-23 1987-09-15 American Standard Inc. Refrigeration tubing joint
US4709948A (en) * 1985-08-19 1987-12-01 Raychem Limited Fibre reinforced polymeric article
US4731273A (en) * 1985-07-08 1988-03-15 Minnesota Mining And Manufacturing Company Heat-recoverable closure with crosslinked pressure-sensitive adhesive
US4732412A (en) * 1981-10-27 1988-03-22 Nv Raychem S.A. Coated recoverable articles
US4756781A (en) * 1986-09-29 1988-07-12 Etheridge David R Method of connecting non-contaminating fluid heating element to a power source
US4790544A (en) * 1983-12-19 1988-12-13 Raychem Gmbh Expansible seal
US4835365A (en) * 1986-09-29 1989-05-30 Etheridge David R De-ionized fluid heater and control system
US4875957A (en) * 1986-09-29 1989-10-24 Etheridge David R Method of connecting a non-contaminating fluid heating element to a power source
US5033775A (en) * 1986-03-20 1991-07-23 Caoutchouc Manufacture Et Plastiques Connecting or branching device for flexible hoses
US5302428A (en) * 1992-09-29 1994-04-12 Shaw Industries Ltd. Multi-layer wraparound heat shrink sleeve
US5988689A (en) * 1997-12-26 1999-11-23 Central Plastics Company Heat-shrinkable electrofusion fittings and methods
US20030080561A1 (en) * 2001-10-04 2003-05-01 Martin Ronald Allen Ezra Martin Ron Underground couplings
EP1384931A1 (fr) * 2002-07-27 2004-01-28 Walter Stucke Isolation et procédé d'isolation pour la soudure d'un tuyau qui est isolé à l'exception de la zone soudée
US6736430B1 (en) * 1999-03-05 2004-05-18 Tyco Electronics Raychem Nv Method of sealing a joint between two pipes
US20060159942A1 (en) * 2005-01-14 2006-07-20 Mamish Abboud L Corrosion protection system for transport pipe
US7093860B2 (en) * 2003-01-29 2006-08-22 Ncf Industries, Inc. System for joining sections of composite reinforced line pipe
WO2007062871A1 (fr) 2005-12-03 2007-06-07 Skumtech As Protection anticorrosion pour des éléments d’ancrage dans la roche
US20080054629A1 (en) * 2004-09-27 2008-03-06 Bussan Nanotech Research Institute, Inc. Tube End Connector
DE102007038257A1 (de) 2007-07-27 2009-01-29 Stucke, Walter, Dipl.-Ing. Formteil für Rohrleitungen aus Stahl
US20090066038A1 (en) * 2005-08-30 2009-03-12 Daihachi Shojima Sealing structure
US20130113210A1 (en) * 2010-06-09 2013-05-09 Logstor A/S Shrink sleeve for joining insulated pipes
US20130307260A1 (en) * 2011-02-01 2013-11-21 Uponor Innovation Ab Clamping ring
US20150091293A1 (en) * 2011-06-24 2015-04-02 The Boeing Company Apparatus for preventing spark propagation
US20170343149A1 (en) * 2016-05-31 2017-11-30 Berry Plastics Corporation Closure patch
US10633932B1 (en) 2016-12-17 2020-04-28 Daryl Vincent Mazzanti System and method to reduce wellbore annular fluid volumes

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE434564B (sv) * 1975-04-09 1984-07-30 Raychem Corp Anordning for hopkoppling av ror eller andra substrat omfattande ett organ av minnesmetall
SE428596B (sv) * 1975-04-09 1983-07-11 Raychem Corp Anordning for hopkoppling av substrat exv ror omfattande ett organ av minnesmetall
US4092193A (en) * 1975-06-30 1978-05-30 Raychem Corporation Method for joining substrates utilizing coupling means
US4386629A (en) 1980-07-31 1983-06-07 Raychem Corporation Apparatus for internal pipe protection
GB2085111B (en) * 1980-07-31 1984-06-27 Raychem Corp Device for and method of internal pipeline protection
CA1179442A (fr) * 1980-12-03 1984-12-11 James A. Richards Composition de polyamide reticulable a la lumiere
DE3377343D1 (en) * 1982-01-28 1988-08-18 Raychem Pontoise Sa Bonded polymeric article
GB8304027D0 (en) * 1983-02-14 1983-03-16 Raychem Sa Nv Heat-recoverable article
GB2181201B (en) * 1985-09-30 1989-12-20 Hepworth Iron Co Ltd Coupling pipes
DE3775772D1 (de) * 1987-09-05 1992-02-13 Hewing Gmbh Verbindungssystem.
EP0309597A1 (fr) * 1987-09-29 1989-04-05 Blome GmbH & Co. Kommanditgesellschaft Revêtement de la zone de raccordement de tuyaux en acier soudés l'un à l'autre
FI82633C (fi) * 1987-10-12 1991-04-10 Muolon Oy Foerfarande foer framstaellning av en krympande produkt.
EP0680581B1 (fr) * 1993-01-21 1999-06-16 Raychem Corporation Article thermo-reformable
DE102007040683A1 (de) * 2007-08-29 2009-03-05 Evonik Degussa Gmbh Umhüllte Rohrleitung
EP2204427A1 (fr) 2008-12-23 2010-07-07 J. van Beugen Beheer B.V. Composé adhésif
RU2530949C2 (ru) * 2012-03-26 2014-10-20 Открытое акционерное общество "Акционерная компания по транспорту нефти "Трансфнеть" (ОАО "АК "Транснефть") Способ монтажа противопожарных вставок для труб в теплоизоляции
RU2530943C2 (ru) * 2012-03-26 2014-10-20 Открытое акционерное общество "Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") Способ монтажа теплоизоляции сварного стыка труб для надземной прокладки
RU2530946C2 (ru) * 2012-03-26 2014-10-20 Открытое акционерное общество "Акционерная компания по транспорту нефти "ТРАНСНЕФТЬ" Способ монтажа теплоизоляции сварного стыка труб для подземной прокладки

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984649A (en) * 1929-12-07 1934-12-18 Standard Oil Co California Protective coating and objects coated therewith
US2915413A (en) * 1955-06-13 1959-12-01 United Biscuit Company Of Amer Non-blocking adhesive sheet
US2992457A (en) * 1960-03-28 1961-07-18 Grace W R & Co Method of joining pipe and tubing
US3012585A (en) * 1957-06-06 1961-12-12 Royston Lab Pipe coating with flowable inner layer
US3035113A (en) * 1959-12-07 1962-05-15 Bendix Corp Method and means for terminating braided insulation and shielding of a wire cable
US3184358A (en) * 1961-06-20 1965-05-18 Multifol Patentverwert Ag Method of forming laminated plastic tubing
US3226807A (en) * 1961-06-15 1966-01-04 Hill Hubbell Company Method of constructing a continuous pipeline
US3243211A (en) * 1962-07-23 1966-03-29 Raychem Corp Connector with fusible material
US3297819A (en) * 1964-08-10 1967-01-10 Raychem Corp Heat unstable covering
US3312772A (en) * 1963-08-23 1967-04-04 Raychem Corp Connectors with heat recoverable members

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984649A (en) * 1929-12-07 1934-12-18 Standard Oil Co California Protective coating and objects coated therewith
US2915413A (en) * 1955-06-13 1959-12-01 United Biscuit Company Of Amer Non-blocking adhesive sheet
US3012585A (en) * 1957-06-06 1961-12-12 Royston Lab Pipe coating with flowable inner layer
US3035113A (en) * 1959-12-07 1962-05-15 Bendix Corp Method and means for terminating braided insulation and shielding of a wire cable
US2992457A (en) * 1960-03-28 1961-07-18 Grace W R & Co Method of joining pipe and tubing
US3226807A (en) * 1961-06-15 1966-01-04 Hill Hubbell Company Method of constructing a continuous pipeline
US3184358A (en) * 1961-06-20 1965-05-18 Multifol Patentverwert Ag Method of forming laminated plastic tubing
US3243211A (en) * 1962-07-23 1966-03-29 Raychem Corp Connector with fusible material
US3312772A (en) * 1963-08-23 1967-04-04 Raychem Corp Connectors with heat recoverable members
US3297819A (en) * 1964-08-10 1967-01-10 Raychem Corp Heat unstable covering

Cited By (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631898A (en) * 1970-01-13 1972-01-04 Alfred H Harley Insulating pipe joint fitting and method of making same
US3744823A (en) * 1971-03-01 1973-07-10 Shaw Pipe Ind Ltd High temperature pipeline joints
US4075752A (en) * 1971-11-20 1978-02-28 Robert Bosch Gmbh Method of making distributor assembly bearing structures and the like
US3877490A (en) * 1972-07-25 1975-04-15 Nippon Kokan Kk Steel pipes provided with plastic coatings
US3814139A (en) * 1972-08-23 1974-06-04 Stone Ind Corp Insulating connector
US3908267A (en) * 1972-08-23 1975-09-30 Stone Ind Corp Method of applying an insulating connector
USRE30447E (en) * 1972-08-23 1980-12-16 J. L. Clark Manufacturing Co. Insulating connector
USRE30817E (en) * 1972-08-23 1981-12-08 J. L. Clark Manufacturing Co. Method of applying an insulating connector
US4035534A (en) * 1972-09-01 1977-07-12 Raychem Corporation Heat-shrinkable laminate
US4168192A (en) * 1972-09-01 1979-09-18 Raychem Corporation Process for making recoverable tubular article
US4207364A (en) * 1972-09-01 1980-06-10 Raychem Corporation Heat-shrinkable laminate
US3957382A (en) * 1973-06-11 1976-05-18 Raychem Corporation Method of processing fusible inserts
DE2647122A1 (de) * 1975-06-16 1978-04-27 Raychem Corp Rueckstellbare muffe sowie ihre verwendung und herstellung
US4135553A (en) * 1975-06-16 1979-01-23 Raychem Corporation Recoverable sleeve
US4188979A (en) * 1975-08-26 1980-02-19 Nitto Denki Kogyo Kabushiki Kaisha Protective cover for a thermoresponsive tube
US4070044A (en) * 1976-01-22 1978-01-24 Phillips Petroleum Company Polymer pipe connection and method to make it
US4424990A (en) 1980-01-30 1984-01-10 Raychem Corporation Thermochromic compositions
US4374881A (en) * 1981-03-24 1983-02-22 Eaton Corporation Heat recoverable connector
US4450871A (en) * 1981-04-21 1984-05-29 Sumitomo Electric Industries, Ltd. Heat-shrinkable tubes
US4465309A (en) * 1981-08-13 1984-08-14 Umac, Inc. Connecting or repair device
US4549752A (en) * 1981-08-13 1985-10-29 Umac, Inc. Connector for tubular members
US4732412A (en) * 1981-10-27 1988-03-22 Nv Raychem S.A. Coated recoverable articles
EP0079610A1 (fr) * 1981-11-18 1983-05-25 Ube Industries, Ltd. Procédé pour former une couche protectrice à la jonction entre tubes d'acier noir couverts
US4790544A (en) * 1983-12-19 1988-12-13 Raychem Gmbh Expansible seal
EP0172039A2 (fr) * 1984-08-17 1986-02-19 Raychem Limited Article polymère renforcé par fibres
EP0172039A3 (en) * 1984-08-17 1987-04-22 Raychem Limited Fibre reinforced polymeric article
EP0173541A2 (fr) * 1984-08-22 1986-03-05 Raychem Gmbh Procédé pour la production d'un dispositif d'étanchéité d'un conduit
EP0173541A3 (en) * 1984-08-22 1987-08-12 Raychem Gmbh Method and means for sealing
US4731273A (en) * 1985-07-08 1988-03-15 Minnesota Mining And Manufacturing Company Heat-recoverable closure with crosslinked pressure-sensitive adhesive
US4709948A (en) * 1985-08-19 1987-12-01 Raychem Limited Fibre reinforced polymeric article
US5033775A (en) * 1986-03-20 1991-07-23 Caoutchouc Manufacture Et Plastiques Connecting or branching device for flexible hoses
US4693501A (en) * 1986-07-23 1987-09-15 American Standard Inc. Refrigeration tubing joint
US4756781A (en) * 1986-09-29 1988-07-12 Etheridge David R Method of connecting non-contaminating fluid heating element to a power source
US4835365A (en) * 1986-09-29 1989-05-30 Etheridge David R De-ionized fluid heater and control system
US4875957A (en) * 1986-09-29 1989-10-24 Etheridge David R Method of connecting a non-contaminating fluid heating element to a power source
US5302428A (en) * 1992-09-29 1994-04-12 Shaw Industries Ltd. Multi-layer wraparound heat shrink sleeve
US5988689A (en) * 1997-12-26 1999-11-23 Central Plastics Company Heat-shrinkable electrofusion fittings and methods
US6736430B1 (en) * 1999-03-05 2004-05-18 Tyco Electronics Raychem Nv Method of sealing a joint between two pipes
US20030080561A1 (en) * 2001-10-04 2003-05-01 Martin Ronald Allen Ezra Martin Ron Underground couplings
EP1384931A1 (fr) * 2002-07-27 2004-01-28 Walter Stucke Isolation et procédé d'isolation pour la soudure d'un tuyau qui est isolé à l'exception de la zone soudée
US7093860B2 (en) * 2003-01-29 2006-08-22 Ncf Industries, Inc. System for joining sections of composite reinforced line pipe
US20080054629A1 (en) * 2004-09-27 2008-03-06 Bussan Nanotech Research Institute, Inc. Tube End Connector
US7361384B2 (en) * 2005-01-14 2008-04-22 Covalence Specialty Materials Corp. Corrosion protection system for transport pipe
US20060159942A1 (en) * 2005-01-14 2006-07-20 Mamish Abboud L Corrosion protection system for transport pipe
US8079600B2 (en) * 2005-08-30 2011-12-20 Nok Corporation Sealing structure
US20090066038A1 (en) * 2005-08-30 2009-03-12 Daihachi Shojima Sealing structure
WO2007062871A1 (fr) 2005-12-03 2007-06-07 Skumtech As Protection anticorrosion pour des éléments d’ancrage dans la roche
DE102007038257A1 (de) 2007-07-27 2009-01-29 Stucke, Walter, Dipl.-Ing. Formteil für Rohrleitungen aus Stahl
US20130113210A1 (en) * 2010-06-09 2013-05-09 Logstor A/S Shrink sleeve for joining insulated pipes
US20130307260A1 (en) * 2011-02-01 2013-11-21 Uponor Innovation Ab Clamping ring
US9869413B2 (en) * 2011-02-01 2018-01-16 Uponor Innovation Ab Clamping ring
US20150091293A1 (en) * 2011-06-24 2015-04-02 The Boeing Company Apparatus for preventing spark propagation
US10112724B2 (en) * 2011-06-24 2018-10-30 The Boeing Company Apparatus for preventing spark propagation
US20170343149A1 (en) * 2016-05-31 2017-11-30 Berry Plastics Corporation Closure patch
US10746342B2 (en) * 2016-05-31 2020-08-18 Seal For Life Industries Us Llc Closure patch
US10633932B1 (en) 2016-12-17 2020-04-28 Daryl Vincent Mazzanti System and method to reduce wellbore annular fluid volumes

Also Published As

Publication number Publication date
SE335081B (fr) 1971-05-10
FR1469479A (fr) 1967-02-17
NL141811B (nl) 1974-04-16
GB1116879A (en) 1968-06-12
BE668616A (fr) 1965-12-16
NL6510948A (fr) 1966-02-22
DE1504803A1 (de) 1971-11-18
CH450236A (de) 1968-01-15

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