Denso Digest Volume 31 Number 4densona.com/Denso_Digests/PDFs/Denso-Digest-Vol-31-No-4.pdf ·...

LEADERS IN CORROSION PREVENTION & SEALING TECHNOLOGY

Volume 31 - Number 4 The rehabilitation of the Maitlands River Pipebridge, South Africa. Pipebridge being cleaned of old coating

ready for the application of the Denso Steelcoat System - See story pages 8-9

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WINN & COALES INTERNATIONAL LTD

WINN & COALES (DENSO) LTD Tel: +44 (0) 20 8670 7511Denso House, Chapel Road, London SE27 OTR, England Fax: +44 (0) 20 8761 2456

Anti-corrosion and sealing systems Email: [email protected]: www.denso.net

ARCHCO-RIGIDON Tel: +44 (0) 20 8761 6244Denso House, Chapel Road, London SE27 OTR, England Fax: +44 (0) 20 8761 2456

Corrosion resistant linings Email: [email protected]: www.denso.net

DENSO NORTH AMERICA INC - CANADA Tel: +1 416 291 343590 Ironside Crescent, Unit 12, Toronto, Ontario, M1X 1M3 Fax: +1 416 291 0898Canada Email: [email protected]

Anti-corrosion and sealing systems Web site: www.densona.com

DENSO USA - LP Tel: +1 281 821 33559747 Whithorn Drive, Houston, Texas 77095 Fax: +1 281 821 0304United States of America Email: [email protected]

Anti-corrosion and sealing systems Website: www.densona.com

DENSO SOUTH AFRICA (PTY) LTD Tel: +27 31 569 4319 120 Malacca Road, Redhill Industrial Area, Durban North 4051, Fax: +27 31 569 4328Republic of South Africa Email: [email protected]

Anti-corrosion and sealing systems Website: www.denso.co.za

DENSO (AUSTRALIA) PTY LTD Tel: +61 1300 658 590411-413 Victoria Street, Brunswick, Victoria 3056, Fax: +61 39387 6973Australia Email: [email protected]

Anti-corrosion and sealing systems Website: www.densoaustralia.com.au

DENSO (NEW ZEALAND) LTD Tel: +64 9274 1255PO Box 76167, Manakau City, Auckland, Fax: +64 9274 1258New Zealand Email: [email protected]

Anti-corrosion and sealing systems Website: www.densoaustralia.com.au

SEASHIELD INTERNATIONAL Tel: +44 (0) 20 8670 7511Denso House, Chapel Road, London SE27 OTR, England Fax: +44 (0) 20 8761 2456

Marine corrosion protection systems Email: [email protected]: www.denso.net

SEASHIELD INTERNATIONAL Tel: +1 281 821 33559747 Whithorn Drive, Houston, Texas 77095 Fax: +1 281 821 0304United States of America Email: [email protected]

Marine corrosion protection systems Website: www.densona.com

SEASHIELD INTERNATIONAL Tel: +61 1300 658 590411-413 Victoria Street, Brunswick, Victoria 3056, Fax: +61 1300 655 064Australia Email: [email protected]

Marine corrosion protection systems Website: www.densoaustralia.com.au

SEASHIELD INTERNATIONAL Tel: +64 9274 1255PO Box 76167, Manakau City, Auckland, Fax: +64 9274 1258New Zealand Email: [email protected]

Marine corrosion protection systems Website: www.densoaustralia.com.au

PREMIER COATINGS LTD Tel: +44 (0) 1233 770663Headcorn Road, Smarden, near Ashford, Fax: +44 (0) 1233 770633Kent TN27 8PJ, England Email: [email protected]

Membranes and corrosion protection systems Website: www.premiercoatings.com

For further information on our products and their suitability for your particular project,please contact any of the Denso companies listed below:


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For quick identification of the relevantproduct type used in each story we

have used the following colour codes:

BURIED PIPELINES & LPG VESSELS

EXPOSED STEEL & PIPEWORK

STORAGE TANKS, PUMPS ETC

SEALING MASTICS

MEMBRANES & FLASHINGS

INDUSTRIAL TAPES

SUB SEA PIPELINES & JETTY PILES

Protective coatings for......

Protective linings for.....

Sealing & waterproofing.....

Sealing Asphalt to Steel - Scotland

Denso Aids Installation of Erskine BridgeCrash Barrier

Consequently the existingbarriers in the central reservewere not providing appropriatelevels of protection to the bridgetowers and cable anchoragesagainst impact from the largestHGV’s. Similarly, nearsidebarriers needed replacing in thisproject. All of the new barrierswere designed by Flint & Neil,specialist bridge consultants.

The work was carried outfor Transport Scotland whoappointed Highway BarrierSolutions (HBS) as PrincipalContractor. Scotland TranServeis the Engineer who managedthe work.

The Glasgow branch of BriggsAmasco, specialists in industrialroofing and surface waterproofingrecommended the use ofDensoband in the reinstatementof the road asphalt adjoining thesteel posts of the new crashbarriers. Densoband was used toform a flexible weatherproof sealon the vertical joint face betweenthe asphalt and steel.

Working in conjunction withScotland TransServe, Briggs

The Erskine Bridge

Densoband has been chosen for use in the installation of new crash barriers on the A898Erskine Bridge, Glasgow. The volume of traffic has greatly increased since the bridge wasopened in 1971.

Amasco applied all the asphaltreinstatement and Densoband.

Densoband is approved bythe Department of Transport in

the Manual of Contracts 7thEdition for use in asphalt wearingcourse joints.

Densoband forms a flexible weatherproof seal between the crash barrier bases and surrounding asphalt.

Country: ScotlandObject: Crash barrier basesProblem: Weatherproof jointingProductsolution: Densoband

Project SummaryProduct type:

Sealing Mastics

Vol: 31 No. 4, Date: 02. 2015, Page: 3

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Corrosion Prevention for Pipebridge - Ireland

Denso Steelcoat Chosen forDerry Gas Pipeline

Following consultation withcontractors McNicholas it wasproposed to use Steelcoat100/400 System to providelong-term protection fromcorrosion in the aggressivemarine environment. Theheavy duty Steelcoat systemcomprises Denso Hi-Tack Primer,Densyl Mastic, Denso Hi-TackTape, Denso Ultraseal Tape and

Firmus Energy who are a gas network operator responsiblefor the supply of natural gas to over 10 major cities and townsin Northern Ireland recently decided to upgrade theprotection to a 360m long 273mm diameter pipeline carryingnatural gas across the River Foyle in Derry, Londonderry.

Country: IrelandObject: Steel pipelineProblem: Corrosion prevention Product Denso Steelcoatsolution: 100/400 System


Exposed Steel Coating

Denso Acrylic Topcoat.It was chosen because of itsproven properties for corrosionprevention and its suitability forapplication to surfaces withminimum surface preparation.

The Denso Steelcoat Systemwas applied by EB Gas ServicesLtd of Newry under thesupervision of McNicholas.Surface preparation to remove

existing loose paint coating wascarried out using hand scrapersand wire brushing.

Firmus Energy are delightedwith the completed applicationwhich included matching theDenso Acrylic Topcoat to thecolour of the existing overallbridge structure.

The Denso Steelcoat 100/400 System was an ideal choice for protection of an exposed steel pipeline in a marine environment.

Vol: 31 No. 4, Date: 02. 2015, Page: 4


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Resistant Linings for Pipes, Injector Spools and Vessels - United Kingdom

Archco-Rigidon ProtectsInjector Spools, Pipeworkand Vessels

Cristal Pigments, also ofImmingham, is a leadingcustomer for Painting andLabour’s services and recentlycommissioned them to line someinjector spools and pipework forwhich the pretreatment was

Painting and Labour Ltd of Immingham are long-term users ofArchco-Rigidon 403D and 503D glass flake vinyl ester linings.The company has been regularly contracted to line internalsurfaces of pipework, vessels and also injector spools withthese specialist protective linings following abrasive gritblasting to the Swedish Sa21⁄2 standard near white metal.

done at Painting andLabour’s workshop.

Following blast cleaning ofinternal surfaces to Sa21⁄2 thefirst coat of Archco-Rigidon503D was applied toapproximately 1000 microns.

A second coat consisting ofArchco-Rigidon 403D wasapplied to 1000 micronsthickness to achieve an overallthickness of 2000 microns.A final 250 microns coat ofArchco-Rigidon Blue WaxTopcoat was then applied.Final thickness readings weretaken and full holiday detectionwas carried out to ensure thework was in line withspecification requirements.

Whilst carrying out all ofthe lining work, Cristal Pigmentsrepresentatives carried outinspections of the processesand reported their fullsatisfaction with them.

Painting and Labour also linedtwo small receiver vessels onsiteat Crystal Pigments. One ofthem only required coating withArchco-Rigidon 403D on thebottom dish end. The full vesselspecification was abrasive blastcleaning followed by multiplebrush applied coats ofArchco-Rigidon 403D to achieve100microns overall thickness. Oncompletion of lining both vesselswere checked for film thicknessand holiday detection readings.

Country: UKObject: Injector spools,

pipework and vesselsProblem: Corrosion preventionProduct Archco-Rigidonsolution: 403D and 503D

Project Summary

Product type:Protective Lining

Vol: 31 No. 4, Date: 02. 2015, Page: 5

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Protection of Marine Piles - Australia

Country: AustraliaObject: 235 steel piles and

80 fender strutsProblem: Original coating failed Product SeaShieldsolution: Series 2000FD

Project Summary

Product type: Sub Sea Splash Zone Coating

The Port of Dampier, located in the Pilbara Region of WesternAustralia, is the world’s second largest bulk export port.Exporting iron ore, salt, liquefied natural gas, anhydrousammonia as well as project cargo, break bulk and general cargo

The Port is locatedapproximately 1,550 kilometresnorth of Perth on the westPilbara’s Burrup Peninsula. With more than 120ha of landarea and 650 km2 of marinewaters, the Port is one ofAustralia’s largest bulk exportports. Its network extends 350kilometres inland to the iron oredeposits of the Pilbara region and200 kilometres seaward to the oiland gas fields of theNorth West Shelf.

Problem:The Dampier Port MOF Wharf

Steel Piles had originally beencoated in a marine grade epoxysystem that was prematurelybreaking down due to theextreme marine environmentencountered in the NW ofWestern Australia.The clientrequested a 25 yearmaintenance free solution thatcould be verified through casehistories and independenttesting.

SeaShield Protection for BulkExport Port Wharf Piles

Product Solution:Denso Australia submitted our

Seashield 2000FD system forappraisal against other pileprotection systems available inthe market place.The Seashield 2000FD systemwas ultimately chosen due to itsability to demonstrate:- Long Term case histories- Verifiable product data- Ease of application- Continuous jacket tension- Expected 25+ years’ service life

Now in its 8th year of servicethe Seashield 2000FD systemhas withstood multiple cyclonesand severe seas encounteredduring these destructive storms.

View underneath the MOF Wharf showing the SeaShield 2000FD system applied to the steel piles.

Application of the SeaShield 2000FD Jackets.

Vol: 31 No. 4, Date: 02. 2015, Page: 6


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External Sealing of Precast Concrete Manhole Chambers - Canada

Denso is one of thosecompanies and its petrolatumtape is a product that truly hasexisted without significantchange for nearly a century –and it still works.

The interesting thing is, itworks for much more than itsinitial intention. The history ofDenso petrolatum tape is longand storied and actually quitefascinating and its uses areconstantly being diversified.Innovation through newapplication and not alteration.

Here in Ontario, Canada ourcommunities seem to suffer thesame problem; water infiltrationinto their chambers, culverts andcatch basins. Many of these aredesigned to hold and eventransport water but the problemarises when water is able to enterfrom cracks and failed joints.This results in the erosion of theunder layer of roads, highwaysand city streets causing potholes, traffic delays, safetyconcerns and huge repair bills.

As it turns out, Denso has asolution for this as well. Barrie,Ontario was the first to pick upon this practice and is now usingDenso 12” petrolatum LT tape towrap the exterior of theirchambers both new as well aswhen exposed for rehabilitation.Other municipalities have sincepicked up on this. We are nowtasked with spreading the word ofyet another way Densopetrolatum tape can protect the

infrastructures of our communities. Flexible and able to withstandmovement, pressure, vibration and

In modern history there have been few products that havestood the test of time without undergoing multiplemodifications and “improvements”. Rarely do you see acompany with the confidence to continue to provide a productwithout feeling the need to constantly re-invent it.

Denso Seals CanadianManhole Chambers

temperature fluctuations, DensoLT tape is a simple solution to asimple but serious problem.It iseasy to apply, it requires minimalsurface preparation and nocuring time (allowing for instantbackfill) and is far less expensivethan the much morecomplicated alternatives.

The applications for this time-tested product are endless andthis is truly what makes Densothe leader in corrosion preventionand sealing technologies.

Country: CanadaObject: Concrete manholesProblem: External sealingProduct Denso Petrolatumsolution: Tape


Concrete Manhole Sealant

A new manhole chamber prior to wrapping withDenso Tape.

Manhole chamber wrapped with Denso Tape.

A manhole chamber in Barrie Ontario is exposed for repair is wrapped with Denso Tape.

Vol: 31 No. 4, Date: 02. 2015, Page: 7

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Corrosion Prevention for Pipebridge - Republic of South Africa

In 1964 floods washed awaythe centre pier and the pier hadto be replaced. The concretepipe was also replaced with a1168Ø steel pipe. In 1979 floodswashed away the southernabutment and three pierssubsided. A new abutment and

Rehabilitation of theMaitlands River PipebridgeDenso were recently involved in the rehabilitation of theMaitlands River Pipebridge. The Original Pipebridge was builtin 1948 as a single 670Ø pipe known as the Church HillPipeline. In 1959 a second 1200Ø pre-stressed concrete linewas added to the bridge.

piers had to be constructed. In1981 floods caused anotherthree piers to subside.

All the original piers wherethen replaced and a new 1200Ø,20mm thick welded steel pipelinewas installed to replace theoriginal 670Ø. The 20mm wall

Country: South Africa-Eastern CapeObject: Steel pipebridgeProblem: Corrosion prevention Product Denso Steelcoatsolution: 500 System



thickness was selected so that inthe event of floods washingaway the piers again the pipelinewould be able to support itself.

In 1982 a tender was put outfor the wrapping of the pipelineusing a Denso Tape with a

The pipebridge during the early stages of having the original wrapping removed.

Vol: 31 No. 4, Date: 02. 2015, Page: 8

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Corrosion Prevention for Pipebridge - Republic of South Africa

cement slurry second wrap toprovide mechanical protection.Since then the bridge and pipelinehas undergone very little in theform of maintenance and therewere signs of deteriorationstarting to appear along the±700m x 1200Ø stretch of

pipework.Due to the pipeline being in an

environmentally sensitive area,right on the beach, the work wasgoing to be challenging. Firstthe original wrapping had to beremoved and the pipe surfacecleaned before application of the

Denso Steelcoat 500 systemcould be applied. Because of thelarge diameter of the pipe it wasdecided that the cigarette wrapmethod of applying the tapewould be most suitable forthe project.

Application of the new Denso Steelcoat 500 system.

Application of the Steelcoat System progressingalong the pipebridge

A view from a nearby sand dune shows exactly how close to the ocean the pipebridge is and the harshenvironmental conditions the Denso Steelcoat 500 System needs to perform under.

Vol: 31 No. 4, Date: 02. 2015, Page: 9

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Denso Steelcoat Tank Base Protection - Qatar

Denso Steelcoat SystemProtects Purified Water andCrude Oil Tank Bases The Denso Steelcoat Tank Base Protection System wasrecently chosen to seal the bases of a purified water tankin Qatar and a crude oil tank in the UAE.

Purified Water Tank

1. After cleaning and then priming with DensoHi-Tack Primer the Denso Hi-Tack Tape is applied.

2. Denso Primer D is applied to the masked areabefore the application of the Ultraseal RT Tape.

3. The Denso Ultraseal RT Tape is applied inweatherboard style

4. A coat of Denso Acrylic Topcoat over theUltraseal RT Tape finishes the system.

5. The finished Steelcoat System provides a neat long-lasting flexible weatherproof seal to theproblem area.

The bases and chimes ofAboveground Storage Tanks(AST) present challengingconditions for corrosionprotection. Salt ladened aerosolsand industrial pollutants can be

deposited on the walls of anAST. Rainwater run-off fromthe walls will transport theseaccumulated deposits to thebase of the AST forming astrong electrolyte and

facilitating electrochemicalcorrosion. This can corrode theperiphery of the tank base, theweld area and the lower wall. Itcan also cause crevice corrosionin the underside of the tankbase.These will lead to metalloss, perforation and structuralproblems. The concrete annuluscan also spall and degrade andany seal initially installed to thebase of the tank at time ofconstruction can degrade by theaction of weathering or becomeirreversibly displaced/compressed/debonded by the cyclicmovement caused by emptyingand filling the tank.

Corrosion of the steel,degradation of the concrete, andloss of an effective seal can createa route for the ingress of water tothe underside of the tank causingdamaging and unseen corrosion tothe external base of the AST.This can be particularly likely if theexternal periphery of the AST doesnot drain properly. The solution, isour Denso Steelcoat Tank BaseProtection System.

Vol: 31 No. 4, Date: 02. 2015, Page: 10


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Denso Steelcoat Tank Base Protection - UAE

Crude Oil Tank

1. After cleaning the vulnerable area is primedwith Denso Hi-Tack Primer.

2. All voids are filled with Densyl Mastic.

3. A layer of Denso Hi-Tack Tape is applied.

4. Denso Primer D is applied to a masked areabefore the application of Denso Ultraseal RT Tape.

5. The Denso Ultraseal RT Tape is applied inweatherboard style.

6. A coat of Denso Acrylic Topcoat is appliedover the Denso Ultraseal RT Tape.

Another completed Steelcoat Tank Base Protection System.

Country: Qatar & UAEObject: Steel storage tanksProblem: Corrosion prevention Product Denso Steelcoatsolution: Tank Base

Protection System



Vol: 31 No. 4, Date: 02. 2015, Page: 11

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Protection of Marine Piles - Qatar

Denso Rigspray combined with the Denso SeaShield Series2000 FD System has recently been used to protect marinepiles which support holiday villas at the Antara Doha IslandResort, off Doha Bay, Qatar.

First all loose material andmarine growth was removedfrom the piles by mechanicalcleaning methods. The area atthe top of the piles includingthe top pile fins and below to aminimum of 100mm was thenabrasive blast cleaned toachieve an anchor profile of atleast 50 microns. Two coats ofDenso Rigspray were sprayapplied to this area to a totalthickness of 1200 microns.

Next the SeaShield 2000 FDsystem was applied to the pilescomprising a wrap of Denso

Denso System Protects Marine Piles inQatar Holiday Island Resort

Marine Piling Tape followed bythe installation of the SeaShield2000 FD protective Jackets.

This specific combinationsystem was recommended tothe client as the best Densooption available to protect themost vulnerable areas of thisdesign of marine pile.

Country: QatarObject: Steel marine pilesProblem: Corrosion prevention Product Denso Rigspray andsolution: SeaShield 2000 FD


Sub Sea Splash Zone Coating

The piles after cleaning to remove all looseflaking material, marine growth etc.

Vol: 31 No. 4, Date: 02. 2015, Page: 12


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Protection of Marine Piles - Qatar

Abrasive blast cleaning of the top of the pilearea to be coated with Denso Rigspray.

Denso Rigspray was applied by spray in two coats to a total thickness of 1200 microns.

Denso SeaShield 2000 FD application begins with a circumferential wrap of Denso Marine Piling Tape to the previously cleaned pile surface.

The SeaShield 2000 FD Jackets are then placed over the pile and bolted together to complete the system.

Vol: 31 No. 4, Date: 02. 2015, Page: 13

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Corrosion Prevention for Steel Cooling Pipes & Fittings - USA

After years of service thecooling towers had to bereplaced. This provided theperfect opportunity to inspectDenso’s PetrolatumTape System.

The petrolatum tape coatinghad been in service for over 37years in a wet/humid corrosiveenvironment. It was found afterremoving the Denso PetrolatumTape, the steel was in perfectcondition with no corrosion.

In 1977 American General applied the Denso PetrolatumSystem to protect their coolingtower framework and piping.

37 Years of Denso Protectionin a Humid Environment

Since the coating systemexceeded the life of the coolingtower the engineers specifiedthat all pipes, valves, fittingsand structural steel be protectedwith the Denso PetrolatumTape System again.

Denso has a long list ofsuccessful case histories aswe have been manufacturingpetrolatum products forover 85 years.

The removal of a small patch of the Densyl Tapecoating for an inspection of one of the supportI-Beams reveals the steel to be in excellentcondition after 37 years.

The cooling tower pipework in its original 1977 Denso Petrolatum Tape coating after 37 years in service.

Vol: 31 No. 4, Date: 02. 2015, Page: 14


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Corrosion Prevention for Steel Cooling Pipes & Fittings - USA

Country: USAObject: Steel cooling pipes

and fittingsProblem: Corrosion prevention Product Denso Petrolatumsolution: Tape System



The newly replaced cooling tower pipework and support frame protectedwith Denso Petrolatum Tape System..

Vol: 31 No. 4, Date: 02. 2015, Page: 15

For further information - tick boxes, fill in coupon and fax or post to your nearest Denso branch(full list of addresses on page 2).

Name: Title:

Company:

Address:

Phone: Fax:

If you would like more information about our long-term corrosion prevention and sealingsystems that deal with the problem areas listed below, simply tick the boxes and fax back

this completed page and we will supply you with more information.

BURIED ONSHORE COATINGS

External corrosion prevention for underground pipelines, welded joints, valves and fittings.

Protection of mounded LPG vessels and fuel tanks.

MEMBRANES & FLASHINGS

Tanking / waterproofing.

Exposed rooftops and parapets.

SEALING MASTICS

Joint sealing of precast concrete manholes and culverts.

Joint and crack sealing of asphalt road surface wearing courses.

Joint sealing for airport runways.

Sealing of cable entry ducts.

EXPOSED SURFACE COATINGS

Corrosion prevention for chemical plant, structural steelwork, above ground pipes, storage tanks, offshore rigs, bridges and support cables, cranes and pipe bridges.

Corrosion prevention for metalroof purlins and metal roofsheets.

Protecting pre-stressing andpost tensioning bridge cablesand ground anchorages.

SUB SEA/SPLASH ZONE COATINGS

Maintenance corrosion protection for steel jetty piles.

Subsea pipelines and outfalls.

Protection of timber and concrete piling.

FAX NUMBERS UK: +44 (0) 20 8761 2456 USA: +1 281 821 0304 CANADA: +1 416 291 0898

AUSTRALIA: +61 39387 6973 NEW ZEALAND: +64 9274 1258 SOUTH AFRICA: +27 31 569 4328

INDUSTRIAL LININGS

Internal linings for tanks, pumps, vessels and pipelines.

Linings for concrete bunds and floors.

External abrasive wear protection

INDUSTRIAL TAPES

Sealing and insulating

Protecting and bonding

DIY WEATHERPROOFING

Waterproofing and flashing

261.2.2014 Vol 31 No.4 Quarterly Publication

WINN & COALES INTERNATIONAL LTDDenso House, Chapel Road, London SE27 0TR

Tel: +44 (0) 20 8670 7511 Fax: +44 (0) 20 8761 2456 Email: [email protected] Web: www.denso.net

FM 01548 EMS 583748

Denso Digest Volume 31 Number 4densona.com/Denso_Digests/PDFs/Denso-Digest-Vol-31-No-4.pdf ·...

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