WO1987006959A1 - Concrete ballast block with imbedded or attached anodes for cathodic protection of the bolts and their fittings - Google Patents

Concrete ballast block with imbedded or attached anodes for cathodic protection of the bolts and their fittings Download PDF

Info

Publication number
WO1987006959A1
WO1987006959A1 PCT/DK1987/000049 DK8700049W WO8706959A1 WO 1987006959 A1 WO1987006959 A1 WO 1987006959A1 DK 8700049 W DK8700049 W DK 8700049W WO 8706959 A1 WO8706959 A1 WO 8706959A1
Authority
WO
WIPO (PCT)
Prior art keywords
anodes
imbedded
bolts
ballastblock
cathodic protection
Prior art date
Application number
PCT/DK1987/000049
Other languages
French (fr)
Inventor
Svend Martin Hansen
Original Assignee
Svend Martin Hansen
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 Svend Martin Hansen filed Critical Svend Martin Hansen
Priority to DE8787903275T priority Critical patent/DE3771443D1/en
Priority to AT87903275T priority patent/ATE65268T1/en
Publication of WO1987006959A1 publication Critical patent/WO1987006959A1/en
Priority to FI880039A priority patent/FI86442C/en
Priority to NO880038A priority patent/NO164668C/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • 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
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/12—Laying or reclaiming pipes on or under water
    • F16L1/20—Accessories therefor, e.g. floats, weights
    • F16L1/24—Floats; Weights
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2201/00—Type of materials to be protected by cathodic protection
    • C23F2201/02—Concrete, e.g. reinforced

Definitions

  • ballast block with imbedded or attached anodes for cathodic protection of the bolts and their fittings.
  • the invention concerns a cathodic protection device for the metal bolts/screws which are to be used for attaching and fastening two-parted ballastblocks onto pipelines which pipelines are to be placed on or into the bottom of sea or lakes.
  • ballastblocks Different assembling methods for the two-parted ballastblock, such as clamps, yokes, bows, clips, straps etc. has been tried, but it is acknowledged within this trade, that these methods not makes a sufficiently safe hold (grip) of ballastblocks onto for example plasticpipelines, which are to be floated out and submerged into lake - or seabottom.
  • grip sufficiently safe hold
  • the characteristic feature of my invention is, that the anodes exists of metallic pipes which are to be imbedded in the concrete - ballastblock and this metallic pipes are to be placed where the long boltholes - according to the known technique are placed, and in such a way that the centerlines of the pipeformed anodes, or their symmetrical axes, are identically with the centerlines of the long boltholes in the ballastblock.
  • this feature ensures, that the anodes will not be forgotten at the attaching-/mounting operation of the ballastblocks to the pipeline and the cathodic protection of the bolts become more safe and effective because the galvanic field of stress (galvanic action) becomes minimal by the fact, that the anodes, placed in this way will surround the bolt shanks which bolt shanks etc. the anodes shall protect against corrosion.
  • the anodes By forming the anodes as pipes, which are to be imbedded in the ballastblock, ensures furthermore, that the long boltholes in the ballastblock becomes straight and formstable,which - until now - has been a problem for the manufacturers of the ballastblocks of concrete.
  • a simple performance for the arrangement according to the invention consist in, that the anodes consists of cylindrical pipes.
  • This design gives the simplest and cheapest performance, because the devices for fastening and positioning the anodes in the concrete ballastblock- mould can be made from very simple parts. ( elements).
  • this anodes can, however, be appropriately to make this anodes with any other geometrical cross section shape including profiled bars and the like, which are to be imbedded in the ballastblock close to the bolts or on the bolts itselves so, that the anodes surround the boltshank itself.
  • the drawing shows a two- parted ballastblock with imbedded anodes, for cathodic protection of bolts/screws with washers and nuts according to the invention, by that fig. 1 shows a twoparted ballastblock wiewed from the side in the longitudinal direction of the pipeline and fig. 2 shows the same ballastbloc with a vertical cut through the middle of the block at right angles to the longitudinal direction of the pipeline.
  • the two ballastblock- halfparts 1 are shown attached to a pipe 2 by means of metalbolts 3.
  • the metalbolts 3 are surrounded by metallic anodes 4 , which anodes 4 are imbedded in the ballastblock- halfparts 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

Two-parted ballastblock/counterweight (1) of the known type, round (circular), square as shown on the drawing, hexagonal, octagonal or of any other outer geometrical shape, with imbedded metallic anodes (4) which are to be placed in the immediate vicinity of the metal-bolts (3) which shall be used for attaching and fastening the ballastblocks/counterweights (1) onto a pipeline (2) which pipeline is to be placed on or into the bottom of sea or lake. The imbedded anodes (4) are in this way placed in the longitudinal direction of the bolts (3) and very close to these bolts (3) which bolts the anodes (4) shall protect against corrosion in such a way, that the galvanic field of stress becomes minimal. By forming the anodes (4) as pipes, which are to be imbedded in the ballastblock (1), ensures furthermore, that the long boltholes in the ballastblock (1) becomes straight and formstable. The anodes (4) are on the drawing shown as cylindrical pipes, but they can be made with any other geometrical cross section shape including profiled bars and the like. In the same way these imbedded anodes can be made with any other sectionalizing than that shown on the drawing, for example as bushes or bar-pieces, placed in the long boltholes, eventually directly onto the boltshanks themselves.

Description

Concrete ballast block with imbedded or attached anodes for cathodic protection of the bolts and their fittings.
The invention concerns a cathodic protection device for the metal bolts/screws which are to be used for attaching and fastening two-parted ballastblocks onto pipelines which pipelines are to be placed on or into the bottom of sea or lakes.
Cathodic protection of metal parts has been known and used for many years, mainly for marine purposes.
Thus, this form for protection of metalparts against corrosion has in a wide extend been used at, for example: In marine vessels, below the water level, at openings in the sides (boards), at rudder parts and stern tube flanges, blocks of zinc have been placed as anodes.
These anodes emits metal particles as an equivalent amount of particles of the same material or an equivalent amount of particles with the same number of ions as contained in the mentioned parts would disappear if there was not anodes to compensate for this.
Different assembling methods for the two-parted ballastblock, such as clamps, yokes, bows, clips, straps etc. has been tried, but it is acknowledged within this trade, that these methods not makes a sufficiently safe hold (grip) of ballastblocks onto for example plasticpipelines, which are to be floated out and submerged into lake - or seabottom.
The experience shows, that the attachment of two-parted ballastblocks onto pipelines, for example plasticpipelines, is to be done best and safest with the use of metal bolts after the wellknown technique.
In order to protect the mentioned bolts against corrosion, zinc - or other metalblocks which are to be attached at the outer surfaces of the ballastblock, often to the bolt ends, are used in a wide extend. The characteristic feature of my invention is, that the anodes exists of metallic pipes which are to be imbedded in the concrete - ballastblock and this metallic pipes are to be placed where the long boltholes - according to the known technique are placed, and in such a way that the centerlines of the pipeformed anodes, or their symmetrical axes, are identically with the centerlines of the long boltholes in the ballastblock. Consequently, this feature ensures, that the anodes will not be forgotten at the attaching-/mounting operation of the ballastblocks to the pipeline and the cathodic protection of the bolts become more safe and effective because the galvanic field of stress (galvanic action) becomes minimal by the fact, that the anodes, placed in this way will surround the bolt shanks which bolt shanks etc. the anodes shall protect against corrosion. By forming the anodes as pipes, which are to be imbedded in the ballastblock, ensures furthermore, that the long boltholes in the ballastblock becomes straight and formstable,which - until now - has been a problem for the manufacturers of the ballastblocks of concrete.
A simple performance for the arrangement according to the invention consist in, that the anodes consists of cylindrical pipes. This design gives the simplest and cheapest performance, because the devices for fastening and positioning the anodes in the concrete ballastblock- mould can be made from very simple parts. ( elements).
According to the invention it can, however, be appropriately to make this anodes with any other geometrical cross section shape including profiled bars and the like, which are to be imbedded in the ballastblock close to the bolts or on the bolts itselves so, that the anodes surround the boltshank itself.
The drawing, shows a two- parted ballastblock with imbedded anodes, for cathodic protection of bolts/screws with washers and nuts according to the invention, by that fig. 1 shows a twoparted ballastblock wiewed from the side in the longitudinal direction of the pipeline and fig. 2 shows the same ballastbloc with a vertical cut through the middle of the block at right angles to the longitudinal direction of the pipeline. The two ballastblock- halfparts 1 are shown attached to a pipe 2 by means of metalbolts 3. The metalbolts 3 are surrounded by metallic anodes 4 , which anodes 4 are imbedded in the ballastblock- halfparts 1 . In the on the drawing shown design only anodes with cylindrical pipe- shape are indicated, but there is nothing to prevent the use of anodes with any other geometrical cross section shape and sectionalizing. such as bushes or bar- pieces, placed in the longboltholes or directly onto the boltshanks.

Claims

P A T E N T C L A I M S
1. Ballastblock/counterweight of concrete (1) with imbedded anodes (4) for cathodic protection of the bolts/screws, washers and nuts (3), needed for attaching and fastening two- parted ballastblocks/counterweights (1) to a pipeline (2) which pipeline (2) is to be placed on or into the bottom of sea or lakes, c h a r a c t e r i z e d by, that there in or at the same place for the long boltholes in the two- parted concrete ballastblocks (1) are imbedded metallic anodes (4) with a cylindrical pipe- shape, which anodes (4) shall protect the bolts (3) , needed for attaching and fastening the ballastblock- halfparts (1) onto the pipelines (2), against corrosion.
2. Ballastblock/counterweight of concrete with imbedded anodes for cathodic protection of bolts according to claim 1, c h ar a c t e r i z e d by, that the anodes have any other geometrical cross section shape and sectionalizing such as bushes and bars.
3. Ballastblock/counterweight of concrete with imbedded anodes for cathodic protection of bolts according to claims 1 or 2, c h a r a c t e r i z e d by, that the anodes are imbedded in the ballastblock/counterweight and placed directly around the boltshank.
PCT/DK1987/000049 1986-05-09 1987-05-05 Concrete ballast block with imbedded or attached anodes for cathodic protection of the bolts and their fittings WO1987006959A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8787903275T DE3771443D1 (en) 1986-05-09 1987-05-05 CONCRETE BALLAST BLOCK WITH EMBEDDED OR ATTACHED ANODES FOR CATHODICAL PROTECTION OF BOLTS AND FITTINGS.
AT87903275T ATE65268T1 (en) 1986-05-09 1987-05-05 CONCRETE BALLAST BLOCK WITH EMBEDDED OR MOUNTED ANODES FOR CATHODIC PROTECTION OF BOLT AND FITTINGS.
FI880039A FI86442C (en) 1986-05-09 1988-01-06 BETONGVIKT MED INBAEDDADE ELLER FAESTADE ANODER FOER KATODISKT SKYDD AV BULTAR OCH BULTFOERBINDNINGAR.
NO880038A NO164668C (en) 1986-05-09 1988-01-06 CONCRETE BALL LOADS WITH ANODES FOR CATHODIC PROTECTION OF METAL BOLTS AND RELATED PARTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK2146/86 1986-05-09
DK214686A DK153859C (en) 1986-05-09 1986-05-09 CONCRETE BALL CLAST WITH CATHODIC PROTECTION OF BOLTS WITH ACCESSORIES

Publications (1)

Publication Number Publication Date
WO1987006959A1 true WO1987006959A1 (en) 1987-11-19

Family

ID=8110387

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1987/000049 WO1987006959A1 (en) 1986-05-09 1987-05-05 Concrete ballast block with imbedded or attached anodes for cathodic protection of the bolts and their fittings

Country Status (5)

Country Link
EP (1) EP0266405B1 (en)
JP (1) JPS63503313A (en)
DK (1) DK153859C (en)
FI (1) FI86442C (en)
WO (1) WO1987006959A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2423507A (en) * 2005-02-23 2006-08-30 Nexans Subsea umbilical anchoring clamp
EP2825692A4 (en) * 2012-12-31 2015-11-11 Marine Project Man Inc Anode sled and method of assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017115250A1 (en) * 2017-07-07 2019-01-10 Endress+Hauser SE+Co. KG Corrosion protection element for a field device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE325764B (en) * 1965-12-03 1970-07-06 Darre Nilsen N
SE379378B (en) * 1971-08-13 1975-10-06 Preformed Line Products Co
SE422835B (en) * 1980-01-10 1982-03-29 Bjesta Betongvaruindustri Ab Coupling detail for mounting of a weight device intended for ballasting a marine pipeline
DE3132321A1 (en) * 1981-08-17 1983-03-03 Heinrich Karl Dipl.-Ing. 5524 Malberg Stein Tubular anode for cathodic corrosion protection

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1565211A (en) * 1975-12-19 1980-04-16 Pegler Hattersley Ltd Vlve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE325764B (en) * 1965-12-03 1970-07-06 Darre Nilsen N
SE379378B (en) * 1971-08-13 1975-10-06 Preformed Line Products Co
SE422835B (en) * 1980-01-10 1982-03-29 Bjesta Betongvaruindustri Ab Coupling detail for mounting of a weight device intended for ballasting a marine pipeline
DE3132321A1 (en) * 1981-08-17 1983-03-03 Heinrich Karl Dipl.-Ing. 5524 Malberg Stein Tubular anode for cathodic corrosion protection

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2423507A (en) * 2005-02-23 2006-08-30 Nexans Subsea umbilical anchoring clamp
GB2423507B (en) * 2005-02-23 2009-08-19 Nexans Umbilical anchoring clamp
EP2825692A4 (en) * 2012-12-31 2015-11-11 Marine Project Man Inc Anode sled and method of assembly

Also Published As

Publication number Publication date
DK153859B (en) 1988-09-12
FI86442B (en) 1992-05-15
DK153859C (en) 1989-01-30
DK214686A (en) 1987-11-10
DK214686D0 (en) 1986-05-09
EP0266405A1 (en) 1988-05-11
EP0266405B1 (en) 1991-07-17
FI880039A (en) 1988-01-06
FI86442C (en) 1992-08-25
FI880039A0 (en) 1988-01-06
JPS63503313A (en) 1988-12-02

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