US1736915A - Coating of pipes and tubes and like hollow bodies with a bituminous substance in powdered form - Google Patents

Coating of pipes and tubes and like hollow bodies with a bituminous substance in powdered form Download PDF

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Publication number
US1736915A
US1736915A US242006A US24200627A US1736915A US 1736915 A US1736915 A US 1736915A US 242006 A US242006 A US 242006A US 24200627 A US24200627 A US 24200627A US 1736915 A US1736915 A US 1736915A
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US
United States
Prior art keywords
coating
bituminous
pipes
hollow bodies
tubes
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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.)
Expired - Lifetime
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US242006A
Inventor
Illemann Robert
Whitson Ralph Alexander
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Individual
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Publication of US1736915A publication Critical patent/US1736915A/en
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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
    • 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
    • F16L58/12—Coatings characterised by the materials used by tar or bitumen
    • 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
    • Y10S118/00—Coating apparatus
    • Y10S118/10—Pipe and tube inside
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y10T428/2942—Plural coatings

Definitions

  • This invention relates to an improved process for coating concrete and metal pipes, tubes and like hollow bodies with asphalt powder in a hot state.
  • the invention consists in a process for coating concrete and metal pipes, tubes and like hollow bodies with asphalt powder, in which, first, bitumen or a bituminous composition is applied in the form of a film to the surface of the pipe or the like to be coated and, then, a coating of hot asphalt powder is applied on top of the bituminous film and, thereafter, the said coating of asphalt powder is pressed and smoothed, and, finally cooled or allowed to cool.
  • a coating thus prepared is applicable to either the outside or inside surfaces of pipes or the like, and the asphalt powder employed may consist either of powdered natural rock asphalt (that is, limestone naturally impregnated with bitumen) or may consist of pow- :lered asphalt made artificially.
  • any suitable means such as pneumatic rammers may be used and (or) centrifugal force may be utilized.
  • a hollow body such as a concrete pipe
  • manual or power operated means are subsequently used to press and smooth the complete lining.
  • One method of lining a pipe in which the bituminous film and asphalt powder are both applied centrifugally, is as follows
  • the pipe is placed in a horizontal position and rapidly spun round its own aXis.
  • bitumen or bituminous composition is then filled with hot liquid bitumen or bituminous composition and, while the pipe is spinning, the trough is projected into the interior thereof and, when completely inserted, it is tilted to one side so that the bitumen or bituminous composition is discharged and distributed evenly over the interior surface of the pipe by centrifugal force. Thereafter the trough is righted and withdrawn from the interior of the pipe. Hot asphalt powder is then introduced into the trough which is thereupon inserted once more into the pipe and tilted over gradually so that the powder can be distributed evenly over the adhesive film of bitumen or bituminous composition by centrifugal action.
  • the trough is or may be fitted with a ramming or smoothing device capable of being brought to bear on the lining by movement of the trough transversely of the pipe.
  • the pressure of the ramn'iing or smoothing device is variable, and to ensure that the said pressure is applied normal to the lining, the device may com prise a roller or the like. If desired, a separate trough may be used for the introduction of the asphalt'powder.
  • bituminous film acts as a key between the surface of the pipe or the like and the asphalt powder and enables a coating of asphalt powder to be applied more effectively, particularly by centrifugal means, than hitherto.
  • the asphalt powder generally consists mainly of limestone, silica or similar mineral matters containing from 9% to 25% bitumen and, while being heated, it is agitated by mechanical or other stirrers.
  • the powder is preferably heated to a temperature of from 90 F. to 180 F. according to the melting point of the bitumen which the powder may contain.
  • the body itself is preferably heated before the application of the bituminous film and asphalt powder.
  • Hollow bodies having a coating which comprises a coat of adhesive bituminous sub stance spread over the surface of the body, and an outer coat of asphalt powder consolidated on said adhesive coat.
  • Hollow bodies having a coating which 5 comprises a coat of adhesive bituminous substance spread over the surface of the body, and an outer coat of powdered natural rock asphalt consolidated on said adhesive coat. 3.
  • the steps of heating asphalt powder superimposing on the bituminous oo'ating of the body a coat of said heated asphalt powder, and consolidating said asphalt powder on said bituminous coating by pressure so as to provide a coating which does not creep or flow in hot climates. 4.
  • bituminously lined hollow bodies such as pipes and the like

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

Patented Nov. 26, 1929 UNITED STATES PATENT OFFICE ROBERT ILLEMANN AND RALPH ALEXANDER WHITSON, OF GLASGOV, SCOTLAND COATING OF PIPES AND TUBES AND LIKE HOLLO'W' BODIES WITH A BITUMINOUS SUBSTANCE IN POWDERED FORM No Drawing. Application filed December 22, 1927, Serial No. 242,006, and in Great Britain January 26, 1927.
This invention relates to an improved process for coating concrete and metal pipes, tubes and like hollow bodies with asphalt powder in a hot state.
The invention consists in a process for coating concrete and metal pipes, tubes and like hollow bodies with asphalt powder, in which, first, bitumen or a bituminous composition is applied in the form of a film to the surface of the pipe or the like to be coated and, then, a coating of hot asphalt powder is applied on top of the bituminous film and, thereafter, the said coating of asphalt powder is pressed and smoothed, and, finally cooled or allowed to cool.
A coating thus prepared is applicable to either the outside or inside surfaces of pipes or the like, and the asphalt powder employed may consist either of powdered natural rock asphalt (that is, limestone naturally impregnated with bitumen) or may consist of pow- :lered asphalt made artificially. For pressing the asphalt powder upon the surface of the pipe or the like, any suitable means such as pneumatic rammers may be used and (or) centrifugal force may be utilized.
In lining the interior surface of a hollow body such as a concrete pipe, we may apply the adhesive film of bitumen or bituminous composition to the surface in any known manner, as, for example, by dipping, spraying, painting or by centrifugal force, and, thereafter, we may apply the hoLa sphalt pgwdeggn top of the said adhesive film centrifugally,orbyother suitable means. Ineach case, manual or power operated means are subsequently used to press and smooth the complete lining.
One method of lining a pipe, in which the bituminous film and asphalt powder are both applied centrifugally, is as follows The pipe is placed in a horizontal position and rapidly spun round its own aXis. A long trough, capable of being tilted to either side,
is then filled with hot liquid bitumen or bituminous composition and, while the pipe is spinning, the trough is projected into the interior thereof and, when completely inserted, it is tilted to one side so that the bitumen or bituminous composition is discharged and distributed evenly over the interior surface of the pipe by centrifugal force. Thereafter the trough is righted and withdrawn from the interior of the pipe. Hot asphalt powder is then introduced into the trough which is thereupon inserted once more into the pipe and tilted over gradually so that the powder can be distributed evenly over the adhesive film of bitumen or bituminous composition by centrifugal action. In order that the lining of asphalt powder may be pressed and (or) smoothed, the trough is or may be fitted with a ramming or smoothing device capable of being brought to bear on the lining by movement of the trough transversely of the pipe. Preferably, the pressure of the ramn'iing or smoothing device is variable, and to ensure that the said pressure is applied normal to the lining, the device may com prise a roller or the like. If desired, a separate trough may be used for the introduction of the asphalt'powder.
It will be understood that the bituminous film acts as a key between the surface of the pipe or the like and the asphalt powder and enables a coating of asphalt powder to be applied more effectively, particularly by centrifugal means, than hitherto. The asphalt powder generally consists mainly of limestone, silica or similar mineral matters containing from 9% to 25% bitumen and, while being heated, it is agitated by mechanical or other stirrers. The powder is preferably heated to a temperature of from 90 F. to 180 F. according to the melting point of the bitumen which the powder may contain. In lining the interior of metal pipes and like bodies, the body itself is preferably heated before the application of the bituminous film and asphalt powder.
By means of the process described a coating is produced which adheres tenaciously to the surface of the pipe or the like and which does not creep or flow in hot climates. In our process, furthermore, asphalt powders having a low percentage of bitumen may be successfully used.
We claim v 1. Hollow bodies having a coating which comprises a coat of adhesive bituminous sub stance spread over the surface of the body, and an outer coat of asphalt powder consolidated on said adhesive coat.
2. Hollow bodies having a coating which 5 comprises a coat of adhesive bituminous substance spread over the surface of the body, and an outer coat of powdered natural rock asphalt consolidated on said adhesive coat. 3. In the manufacture of bituminously coated hollow bodies, the steps of heating asphalt powder, superimposing on the bituminous oo'ating of the body a coat of said heated asphalt powder, and consolidating said asphalt powder on said bituminous coating by pressure so as to provide a coating which does not creep or flow in hot climates. 4. In the manufacture of bituminously lined hollow bodies such as pipes and the like, the steps of heating asphalt powder, distributing a coat of said heated asphalt powder over the bituminous coating of the body by centritugalaction, and consolidating said asphalt powder on said bituminous coating by pressure so as to provide a coating which does not creep 0r flow in hot climates.
In testimony whereof we aflix our signatures.
ROBERT ILLEMANN. RALPH ALEXANDER \VHITSON.
US242006A 1927-01-26 1927-12-22 Coating of pipes and tubes and like hollow bodies with a bituminous substance in powdered form Expired - Lifetime US1736915A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668125A (en) * 1951-07-06 1954-02-02 American Gilsonite Co Method of insulating a metal structure and insulated metal structure
US2688563A (en) * 1951-11-28 1954-09-07 Polykote Inc Process of coating metal strip with polyethylene
US2737461A (en) * 1950-09-16 1956-03-06 Jerome S Heisler Process of forming adherent polyethylene coating on metal surfaces
US2935412A (en) * 1954-12-21 1960-05-03 Atlantic Refining Co Composition for protecting metallic structures

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737461A (en) * 1950-09-16 1956-03-06 Jerome S Heisler Process of forming adherent polyethylene coating on metal surfaces
US2668125A (en) * 1951-07-06 1954-02-02 American Gilsonite Co Method of insulating a metal structure and insulated metal structure
US2688563A (en) * 1951-11-28 1954-09-07 Polykote Inc Process of coating metal strip with polyethylene
US2935412A (en) * 1954-12-21 1960-05-03 Atlantic Refining Co Composition for protecting metallic structures

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