US3607516A - Methods of coating pipe - Google Patents

Methods of coating pipe Download PDF

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Publication number
US3607516A
US3607516A US881365A US3607516DA US3607516A US 3607516 A US3607516 A US 3607516A US 881365 A US881365 A US 881365A US 3607516D A US3607516D A US 3607516DA US 3607516 A US3607516 A US 3607516A
Authority
US
United States
Prior art keywords
pipe
adhesive
wrapper
rubber
coating
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.)
Expired - Lifetime
Application number
US881365A
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English (en)
Inventor
John H Royston
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.)
Chase Corp
Royston Laboratories Inc
Original Assignee
Royston Laboratories Inc
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 Royston Laboratories Inc filed Critical Royston Laboratories Inc
Application granted granted Critical
Publication of US3607516A publication Critical patent/US3607516A/en
Anticipated expiration legal-status Critical
Assigned to CHASE CORPORATION reassignment CHASE CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE: MARCH 16, 1988, MASSACHUSETTS Assignors: COLUMBIA CHASE CORPORATION (MERGED INTO)
Assigned to SOUTH SHORE BANK reassignment SOUTH SHORE BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHASE CORPORATION
Expired - Lifetime legal-status Critical Current

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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
    • F16L58/16—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings the coating being in the form of a bandage

Definitions

  • a method for forming an electrically insulative pipe by the steps of assembling an elongated wrapper having an inner band of self-adhering adhesive and an outer band of a mechanically strong material and wrapping said wrapper about a pipe to be protected with one side edge being bent upon itself so as to form an exposed edge of adhesive engaging the adhesive on the opposite edges of the wrap whereby to form an adhesive-to-adhesive bond at the overlap.
  • This invention relates to methods of coating pipe and particularly to a method of coating pipe using a tape having a selfadhesive, self-sealing or pressure-sensitive layer.
  • pressuresensitive tapes which can be unrolled from their coils by readily unwinding, do not possess sufi'icient bonding strength between the pressure-sensitive adhesive and the backing of the tape or it would not unroll.
  • a pressure-sensitive tape that can be so easily unrolled will possess no greater ability to bond to its own backing at the overlap when applied to the pipe, and therefore, will not provide a sufficient watertight seal at the overlap area, thus permitting moisture to enter under the insulation at this point.
  • an electrically insulative wrapped pipe by the steps of assembling an elongated wrapper having an inner band of a self-adhering adhesive material and an outer band of a mechanically strong material, wrapping said elongated wrapper about a pipe to be coated with one side edge being bent back upon itself so as to form an exposed edge of adhesive engaging the adhesive on the opposite edge of the wrap whereby to form an adhesive to adhesive bond at the overlap of such wrap.
  • the tension will be increased at the lap area due to the increased thickness, thus affecting a greater fusion of the pressure-sensitive or self-sealing adhesive within the fold.
  • the wrap is applied in helical form so as to form a continuous helical rib extending around the pipe from end to end.
  • a Dillon Universal Testing Machine one typical grade of pressure-sensitive pipeline tape identified as No. 43, manufactured by Minnesota Mining & Manufacturing Company, it can be seen that the bond strength of adhesive to adhesive is three times greater than the bond strength between the adhesive and the backing of this tape.
  • This test was conducted by using -inch strips of tape as follows: l Place the pressure-sensitive adhesive side of two strips face to face for a total of 3 inches in length, leaving two of the 2-inch ends unattached. Place these 2-inch tabs in the jaws of the Dillon Universal Testing Machine and record the pounds pull required to separate the 3-inch area.
  • the adhesive may be any of the pressure-sensitive and self-sealing materials used in the present forms of pressure-sensitive and self-sealing wrappers. It may be for example natural rubber, styrene butadiene rubber, butyl rubber, neoprene, nitrile rubber, polysulfide rubber, ethylene propylene copolymer or terpolymer and the like.
  • the outer band or layer is preferably a strong resilient material such as a film of polyvinyl chloride, polypropylene, cellulose acetate, polyolefins, polycarbonates, polyesters and the like material.
  • the band or wrapper may be applied to a pipe or over a wet or dry primer.
  • FIG. 1 is an isometric view of a pipe having a coating applied according to my invention
  • FIG. 2 is a cross section of a coated pipe according to my invention.
  • a pipe 10 having applied thereto a wrapper made up of a band 11 of polyethylene having a layer 12 of adhesive elastomer on one side thereof.
  • One edge 13 of the wrapper is turned over upon itself as it is applied to the pipe 10 so that an exposed face of adhesive 12 engages the adhesive layer 12 of the opposite edge 14 of the next succeeding wrap of the wrapper on the pipe.
  • the wrapper is drawn tight the adhesive layers flow together forming a complete seal and at the same time a helical rib 15 which extends from one end of the pipe to the other and on which the pipe will rest, raising the balance of the coating away from the surface on which the pipe rests.
  • a method of forming an electrically insulative wrapped pipe comprising the steps of:
  • the outer layer is a member from the group consisting of ethylene-vinyl acetate, polypropylene, polyvinyl chloride, polycarbonates, cellulose acetate, cellulose butyrate, polyesters, polystyrene, polyethylene copolymer and polyolefins.
  • the inner layer is -a member from the group consisting of natural rubber, styrene butadiene rubber, butyl rubber, neoprene, nitrile rubber, ethylene propylene copolymer or terpolymer, polyvinyl chloride and polysulfide rubber.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Adhesive Tapes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US881365A 1969-12-02 1969-12-02 Methods of coating pipe Expired - Lifetime US3607516A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88136569A 1969-12-02 1969-12-02

Publications (1)

Publication Number Publication Date
US3607516A true US3607516A (en) 1971-09-21

Family

ID=25378335

Family Applications (1)

Application Number Title Priority Date Filing Date
US881365A Expired - Lifetime US3607516A (en) 1969-12-02 1969-12-02 Methods of coating pipe

Country Status (3)

Country Link
US (1) US3607516A (fr)
BE (1) BE759781A (fr)
FR (1) FR2072810A5 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181298A1 (fr) * 1984-11-02 1986-05-14 AB AKERLUND & RAUSING Méthode et dispositif pour attacher une enveloppe autour d'un corps tubulaire
US5174846A (en) * 1989-03-18 1992-12-29 Carrs Paper Limited Wrapping elongate articles
US5364677A (en) * 1993-02-03 1994-11-15 Gexco Ent. A Division Of Tennis Ball Saver, Inc. Self-adhesive wrap-on grip for sports racquets and other equipment handles
US5516584A (en) * 1994-08-03 1996-05-14 T C Manufacturing Co., Inc. Primerless pipeline coating tape
US5795623A (en) * 1993-10-29 1998-08-18 Mcguire Manufacturing Co., Inc. Cover assembly and method for covering undersink piping
WO2002014732A1 (fr) * 2000-08-15 2002-02-21 Arnt Skinnes Procede et moyens de protection et d'entretien de cables, conduites et autres, et utilisation d'une gaine enveloppante
US20110056170A1 (en) * 2009-09-09 2011-03-10 Harry Lowe Protective covering for wooden utility poles and method of installation
US20150136310A1 (en) * 2012-03-23 2015-05-21 Gunze Limited Method for producing composite member

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181298A1 (fr) * 1984-11-02 1986-05-14 AB AKERLUND & RAUSING Méthode et dispositif pour attacher une enveloppe autour d'un corps tubulaire
US5174846A (en) * 1989-03-18 1992-12-29 Carrs Paper Limited Wrapping elongate articles
US5364677A (en) * 1993-02-03 1994-11-15 Gexco Ent. A Division Of Tennis Ball Saver, Inc. Self-adhesive wrap-on grip for sports racquets and other equipment handles
US5795623A (en) * 1993-10-29 1998-08-18 Mcguire Manufacturing Co., Inc. Cover assembly and method for covering undersink piping
US5516584A (en) * 1994-08-03 1996-05-14 T C Manufacturing Co., Inc. Primerless pipeline coating tape
WO2002014732A1 (fr) * 2000-08-15 2002-02-21 Arnt Skinnes Procede et moyens de protection et d'entretien de cables, conduites et autres, et utilisation d'une gaine enveloppante
US20110056170A1 (en) * 2009-09-09 2011-03-10 Harry Lowe Protective covering for wooden utility poles and method of installation
US8256184B2 (en) * 2009-09-09 2012-09-04 Harry Lowe Protective covering for wooden utility poles and method of installation
US20150136310A1 (en) * 2012-03-23 2015-05-21 Gunze Limited Method for producing composite member
US9944018B2 (en) * 2012-03-23 2018-04-17 Gunze Limited Method for producing composite member

Also Published As

Publication number Publication date
BE759781A (fr) 1971-05-17
FR2072810A5 (fr) 1971-09-24

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CHASE CORPORATION

Free format text: MERGER;ASSIGNOR:COLUMBIA CHASE CORPORATION (MERGED INTO);REEL/FRAME:004988/0788

Effective date: 19881014

AS Assignment

Owner name: SOUTH SHORE BANK, MASSACHUSETTS

Free format text: SECURITY INTEREST;ASSIGNOR:CHASE CORPORATION;REEL/FRAME:005178/0114

Effective date: 19890421