LEADERS IN CORROSION PREVENTION & SEALING TECHNOLOGY

The $58 million renovation of New York’s historic Battery Maritime Building incorporated the useof Denso SeaShield Fiber-Forms - See story page 6.

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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: mail@denso.net

Website: 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: mail@denso.net

Website: www.denso.net

DARTFORD COMPOSITES LTD Tel: +44 (0) 1322 350097Unit 1, Ness Road, Erith, Kent DA8 2LD Fax: +44 (0) 1322 359438� Manufacture and repair of FRP panels for cars and trains Website: www.dartfordcomposites.co.uk

DENSO NORTH AMERICA INC - CANADA Tel: +1 416 291 343590 Ironside Crescent, Unit 12, Toronto, Ontario, M1X 1M3 Fax: +1 416 291 0898Canada Email: sales@densona.com� Anti-corrosion and sealing systems Web site: www.densona.com

DENSO NORTH AMERICA INC - USA Tel: +1 281 821 335518211 Chisholm Trail, Houston, Texas 77060, Fax: +1 281 821 0304United States of America Email: houston@densona.com� Anti-corrosion and sealing systems Web site: 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: bid@denso.co.za� Anti-corrosion and sealing systems Web site: www.denso.co.za

DENSO (AUSTRALIA) PTY LTD Tel: +61 1300 658 590411-413 Victoria Street, Brunswick, Victoria 3056, Fax: +61 1300 655 064Australia Email: denso@densoaustralia.com.au� Anti-corrosion and sealing systems Website: www.densoaustralia.com.au

DENSO (NEW ZEALAND) LTD Tel: +64 9274 1255Shop 10, 1 Westhaven Drive, Westahaven, Auckland, Fax: +64 9274 1258New Zealand Email: renee@denso.co.nz� Anti-corrosion and sealing systems Website: www.densoaustralia.com.au

SEASHIELD INTERNATIONAL Tel: +44 (0) 20 8670 7511� Marine corrosion protection systems Fax: +44 (0) 20 8761 2456Denso House, Chapel Road, London SE27 OTR, England Email: mail@denso.net

Website: www.denso.net

SEASHIELD INTERNATIONAL Tel: +1 281 821 3355� Marine corrosion protection systems Fax: +1 281 821 030418211 Chisholm Trail, Houston, Texas 77060, Email: sales@densona.comUnited States of America Web site: www.densona.com

SEASHIELD INTERNATIONAL Tel: +61 1300 658 590� Marine corrosion protection systems Fax: +61 1300 655 064411-413 Victoria Street, Brunswick, Victoria 3056, Email: denso@densoaustralia.com.auAustralia Website: www.densoaustralia.com.au

SEASHIELD INTERNATIONAL Tel: +64 9274 1255� Marine corrosion protection systems Fax: +64 9274 1258Shop 10, 1 Westhaven Drive, Westahaven, Auckland, Email: renee@denso.co.nzNew Zealand Website: www.densoaustralia.com.au

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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Denso Tape SealsDucting on Slab Joints

Sealing Buried Ducting & Macalloy Bars To enable quick identification of the subjectmatter within each story in this brochure we

have adopted the following colour codes.

PROJECTS INVOLVING:

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.....

United Kingdom

Freysinnet Ltd, specialist civil engineering contractors based inTelford, Shropshire, are now using Denso Tape on a regular basisto seal ducting prior to it being buried in concrete.

Denso Tape, a non-wovensynthetic fibre fabric coated withan adhesive compound based onpetrolatum, is used to seal twospigots to prevent concreteentering the ducting when it isbeing laid. This application is

now used on all Freysinnet slabjoints. Freysinnet also regularlyuse Denso Tape as ananti-corrosion coating onMacalloy Bars fixed toconcrete bases.

Flexible and easy to apply,

Denso Tape sealing the spigots prior to a concrete infill. Inset shows Macalloy Bars wrapped with Denso Tape.

Denso Tape is ideal for thistype of application and isavailable in a variety of rollwidths to suit requirements.

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United Kingdom

Exposed Surface Coating - Protecting Bolt Heads

Denso Tape Protection forNorthwich Swing Bridge.

A £3.5m refurbishment programme has been carried out on thehistoric Hayhurst swing bridge over the river Weaver in Northwich.British Waterways and Cheshire County Council worked inpartnership to complete the refurbishment as quickly as possible aspart of the new vision for Northwich, linked to the stabilisationof the salt mines.

Denso Tape, a non-wovensynthetic fibre fabric coated withan adhesive compound based onpetrolatum, is being used toprotect stainless steel bolt headsunderneath the walkways andon the angles of thebridge cantilevers.

Built in 1898, the Hayhurst

Bridge was Britain’s firstelectrically powered swingbridge and is a Grade II listedstructure. It was first refurbishedin 1976 and is now in need ofupgrading and strengtheningto cope with moderntraffic requirements.

The bridge incorporates an

innovative design that wasarrived at due to a number ofdifficulties relating to the site,including a continuingsubsidence problem due to saltextraction. It comprises a threespan (tail, spindle and nose)swing bridge and twoindependent approach spans.The bridge rotates on 76 conicalroller bearings and beneath thesuperstructure the bridge isconnected to a sealed circular,segmented pontoon placedunder the centre of gravity.The pontoon acts as a buoysupporting approximately twothirds of the dead load of thestructure, the rest beingsupported on cast ironscrew piles installed aroundthe pontoon.

Denso Tape being applied to the stainless steel bolt heads under the bridge walkways.

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United States of America

Corrosion Prevention - Marine Piles

New York’s Historic LandmarkRenovation

In service for over 95 years,the timber piles had receivedmarine borer damage, whichthreatened the structural integrityof the slips. The pile repairsystem chosen was concreteencapsulation with rebar andfiberglass forms. This majorrehabilitation called for morethan 5,000 linear feet of timberpile repair with Denso’sFiber-Forms. The fiberglassforms provide a strong rigidform to allow concrete to bepumped into the annulus spacebetween the jacket andtimber pile.

Denso’s Fiber-Forms used forthe Battery Maritime Buildingwere custom fabricated to 3⁄16”thick utilizing woven-rovenconstruction. Installation

New York’s Battery Maritime Building received a $58 millionrenovation in which Denso’s SeaShield Fiber-Forms were used torehabilitate the timber piles supporting the slips. The building islisted on the National Register of Historic Places built in 1909 inthe ‘Iron Age’ with vaulted arches and ornamented structural steel.The building has over 140,000 square-feet and offers rarewaterfront views of Manhattan and The Statue of Liberty.

included installing areinforcement cage aroundthe piles and then installingthe fiberglass forms. Theconcrete was then pumpedinto the annulus space andto provide ease of

application the forms werefabricated in a translucent colorto allow the contractor to viewthe concrete level during thepumping operation. Thecompleted repair will provideyears of maintenance freestructural integrity to thetimber piles.

The contractor, David Hoyof Weeks Marine stated, “TheSeaShield Fiber-Forms wereextremely durable, high qualityand provided on-time delivery.The engineers and owners werepleased with the installation asthe application was completedahead of schedule.”

A photograph of the New York Battery MaritimeBuilding taken during the early 1900s.

Left: A recent view of the outside of the building

Above: Completed Fiber-Form installation to the timber piles.

Left: Outside of building during renovation work.

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Canada

Corrosion Prevention - Protecting Buried Pipeline

Denso Protal 7200 used forNew Pipeline Application

Oilsand is the term used fora composition of sand, bitumen,mineral rich clays, and water.Alberta’s Oilsands contain thebiggest known reserve of oil inthe world. There is an estimated1.7 to 2.5 trillion barrels of oiltrapped in the Oilsands.

The Oilsand is partially minedin giant open pit mines. Theprocess begins by clearing theland of trees, stripping thetopsoil to reveal the ore body.The bitumen ore is loaded withhuge electric shovels into 400ton mechanical drive trucks.These trucks vary in size withthe largest having 3500horsepower, empty weight of685,000 pounds and a loadedweight of 1,400,000 pounds.The Oilsand is then transportedto a processing facility wherethe slurry is fed into aseparation vessel where itseparates into three layers-sand,water and bitumen. The bitumenis then transported to refineriesin central Alberta and refined forconsumer use.

Water makes up about 4% ofthe oil sand by weight. Itsurrounds each grain of sand,keeping it separate from the oil.Without this water envelope, thewater-based extraction processnow used could not separate theoil and the sand.About 80% of the oil sands inAlberta are buried too deep forsurface to open pit mining. Aprocess called Steam AssistedGravity Drainage (SAGD)

recovers this oil. Using drillingtechnology, steam is injected intothe deposit to heat the Oilsandlowering the viscosity of thebitumen. The hot bitumenmigrates towards producing wells,bringing it to the surface whilethe sand is left in place.

The upgraded bitumen productconsists of naphtha, light andheavy gas oils that are combinedto produce light sweet oil.

Denso North America Inc.recently completed a pipeline innorthern Alberta in which DensoProtal 7200 was used to coat theweld areas of a 24” Fusion BondEpoxy coated mainline. DensoProtal 7200 was chosen for itsexcellent performancecharacteristics, ease of application,and proven track record.

The surface was first prepared bygrit blasting to clean, near whitemetal finish, SSPC-SP 10 / NACENo. 2. Because the applicationwas done in the winter months,the girth weld was heated withan electric induction coil to 100Degrees Celsius. The DensoProtal 7200 was then rollerapplied at pipe temperature of80 Degrees Celsius to a nominalthickness of 30 mils. Because ofthe quick cure time of the Protal7200, the product was curedbefore the surface of the pipereturned to ambient temperature.The welds were checked forholidays before the pipelinewas buried.

Denso Protal 7200 used for new pipeline application.The main industry in the province of Alberta, Canada is oil and gas.It makes up about 60% of the local economy. Although most oil isextracted through the conventional drilling process, there is also ahuge deposit of a product in northern Alberta. This product isknown as Oilsand.

Denso Protal 7200 is applied above the weld area of thepipe, prior to being spread out over it with a hand roller.

A completed Protal 7200 application.

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The Republic of South Africa

It also removes chlorides andother salts and contaminantsvery effectively, holding theideally prepared surface inpristine condition until theapplication of the selectedlining/coating.

HoldTight 102 has beensuccessfully used on thefollowing projects:

✦ SA Navy Tank Refurbishment Project : Simonstown

✦ Mine Headgear : Rustenburg

✦ Sasol : Pipe Gantries

✦ Sasol : Sulphur Houses

Surface Preparation - Prevention of Flash Rust

HoldTight 102 -Flash rust Inhibitor

HoldTight 102 was recently introduced in the South Africanindustry by Denso South Africa (Pty) Ltd. HoldTight 102 is anadditive that prevents flash rusting of wet abrasive and water blasted

HoldTight 102 is nowregularly specified at between50:1 and 200:1 dilution toremove soluble salts prior to theapplication of Archco-Rigidontank linings and Denso STEpoxy coating.

iron and steel surfaces and ofblasted surfaces in apressurised washdown.

Below and inset: Foremost area of tank is coated withHoldTight 102. Flash rust is clearly visible either sideof where the HoldTight was applied.

View inside a tank where HoldTight 102 was appliedto a panel. Note the flash rust that has appeared on theuntreated area. HoldTight will hold the protected areaflash rust free for 48 hours after application.

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Australia

Denso Rigspray Micro ProtectsThe Burnett River Bridge

Exposed Surface Coatings - Protection of Bridge Pylon Sleeve

Following on from aninspection by the QueenslandDepartment of Main Roads,pylon one was found to besplitting apart at the longitudinalweld and a long termrefurbishment solutionwas required.

The selected system was a 7mx 2.3m ID Steel sleeve thatrequired corrosion preventionable to provide long term servicein all conditions. The PrincipalContractor, Messrs Corroseal PtyLtd contracted BundabergSandblasting to apply two coatsof Denso’s ‘Rigspray Micro’ at aminimum 600 micrometres dryfilm thickness. This micro glassflake reinforced IsopthalicPolyester material is able towithstand the stresses associatedwith transportation, installation,varying river conditions and

The Burnett River Bridge located near the Queensland town ofBundaberg is a heritage listed structure, constructed in 1895 and stillrated to 40 tonnes of traffic. The bridge is used by sugar canefarmers to transport product to the sugar refineries.

thermal expansion as well asdelivering outstanding corrosionand impact resistance.

The finished installation wasinspected and approved by boththe Client and anIndependent Consultant.

Below: The steel sleeve coated with Denso Rigspray Micro being lifted from a nearby pier. Above: The sleeve being fixed into position around the damaged bridge pylon.

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United Kingdom

Densoband Used To Seal NewConcrete Servicing Area JointsAt RAF Waddington

Sealing Mastics - Jointing Asphalt to Concrete Surfaces

Densoband, a polymer modified bitumen strip, has been used as ajoint seal on a new aircraft servicing platform at RAF Waddington,Lincolnshire.

The 4,000m2 concreteplatform has been constructed byRMC Surfacing Ltd of Sheffield,who applied 430 linear metresof Densoband around its edgesto seal the joint between theconcrete and the asphalt standingarea and runway.

Densoband is approved by theDepartment of Transport in theManual of Contracts 7th Edition

for use in asphalt wearing coursejoints for asphalt and asphalt toconcrete interfaces as analternative to the traditional hotpoured bitumen. Unlike itsbitumen alternative, Densobandcovers the whole depth of thejoint face giving a muchsuperior seal and its flexiblecomposition makes it able toabsorb a reasonable amount of

thermal and mechanicalmovement without cracking.Because the joint stays intact,water, salts, pollutants and weedseeds etc cannot penetrate it andit remains unaffected byextremes of temperature and therapid joint deterioration thatcan follow freezing and thawingweather cycles.

Easy to apply and flexible, the picture shows howDensoband follows the contour of the joint with ease.

The application of Densoband to the joint face of the new concrete aircraft servicing platform at RAF Waddington.

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United Kingdom

Denso SeaShield Series 100System Protects Hadrian Bridge

Corrosion Prevention - Marine Piles

As part of a major refurbishment programme for the Hadrian RoadBridge, North Tyneside Council has approved the use of SeaShieldSeries 100 System for improved anti-corrosion protection ofthe bridge piles.

The work has been carriedout by civil engineeringcontractors Edmund Nuttall, whohave installed the SeaShieldSystem to protect 49 of the mostexposed bridge piles.

When the bridge was built inthe late sixties the piles wereprotected with a 50mm concretejacket. Edmund Nuttall engineershave removed this concretejacket before applying the DensoMarine Piling Tape followed by

the SeaShield jackets.Denso Marine Piling Tape is a

cold applied petrolatum basedtpae for application under waterand is a key component of theSeaShield systems. The SeaShieldjackets, which protect the tapefrom mechanical damage, arefabricated from uv lightstabilised HDPE. They arefastened into position witheither non-corroding bands orthreaded fasteners.

View of the SeaShield Series 100 System protected piles under the Hadrian Road Bridge.