Denso Steelcoat™ Protects Scottish Water Pipes
The Denso Steelcoat 100/400™ System has been used to protect two water pipes below a footbridge which crosses a small stream at Scottish Water’s Killylour Water Treatment Works, in Dumfries & Galloway.
The Denso Steelcoat 100/400 System comprises Denso Hi-Tack™ Primer, Denso Profiling Mastic™, Denso Hi-Tack™ Tape, Denso Ultraseal™ Tape and Denso™ Acrylic Topcoat. The system provides an excellent surface coating solution for exposed steelwork, particularly in areas that are faced with constant damp or humid conditions.
Due to the complexity of the structure and the small gaps between the pipes and supporting steel beams, both the Denso Hi-Tack Tape and Denso Ultraseal Tape had to be applied by a mixture of techniques.
This involved weatherboard methods at the joints and “spiral” and “cigarette” wrapping of the barrel lengths. On some sections, the rolls of tape were partially decanted onto empty cores to allow spiral wrapping where possible.
The main contractor for this project was George Leslie Ltd. Sub-contractor was HySpec Services Ltd.
The completed application at Killylour Water Treatment Works.
Corrosion was evident on the exposed steel prior to the system being applied.
The system mid-application.
Denso Hi-Tack Tape™ is one component of the system.
Denso Steelcoat™ Protects Ayr Pipe Crossing
George Leslie Ltd recently carried out a contract for Scottish Water to remove sections of an existing coating and carry out Non-Destructive Testing on a Pipebridge near Ayr. After the testing was complete, these areas were then protected with the Denso Steelcoat 100/400™ System.
Having examined the system applied to the test areas, Scottish Water then decided that as scaffolding was already in place they would take the opportunity to wrap the whole section of pipe which crossed the River Ayr.
The Denso Steelcoat 100/400 System consists of Denso Hi-Tack™ Primer, Denso Profiling Mastic™, Denso Hi-Tack™ Tape, Denso Ultraseal™ Tape and Denso™ Acrylic Topcoat. The system provides an excellent long-term coating solution for exposed steelwork, particularly in areas that are faced with damp conditions. In addition to this, it requires minimal surface preparation, therefore making it ideal for use in remote areas where prevention of contamination to the surrounding environment is important.
The Ayr Pipe Crossing Project.
Applying Denso Steelcoat 100/400™ System to Ayr pipebridge.
Wrapping the pipe with Denso Ultraseal Tape™
The completed application.
Denso Steelcoat™ Chosen Again for Potash Warehouse
As part of ongoing work to replace roof trusses in a Potash Storage Shed, AV Dawson, the Middlesbrough based freight logistics provider has again used Winn & Coales (Denso) Ltd’s Steelcoat 100 System™ to protect the roof trusses from the aggressive materials being stored in the shed.
Historical experience has proven that by applying Denso Hi-Tack™ Primer, Denso Hi-Tack™ Tape with an outer-wrap of Denso PVC Self-Adhesive Tape™ to the roof trusses prior to installation, greatly enhances the life expectancy of the roof in the aggressive dusty atmosphere.
AV Dawson Ltd, founded on Teeside, Middlesbrough in 1938, is a freight logistics supplier operating a diverse range of haulage, port, warehousing and railhead facilities.
The AV Dawson Potash Storage Shed project
Denso Hi-Tack Tape™ applied to the roof trusses
An outerwrap of Denso PVC Self-Adhesive Tape™ is applied over the top of the petrolatum tape layer
The roof trusses are pre-wrapped, before being lifted into position
Denso™ Chosen for Aberdeen Western Peripheral Route
A consortium consisting of Balfour Beatty, Carillion and Galliford Try were awarded the £750 million contract to construct over 40 miles of roads as part of the AWPR (Aberdeen Western Peripheral Route) Scheme, nearing completion.
Winn and Coales (Denso) Ltd supplied over 15,000 linear metres of Densostrip™ to the consortium to seal pre-cast concrete box culverts and inspection chambers on the contract. Densostrip is a rubber and bitumen compound that gives a long-lasting seal that is resistant to chemical and biological attack.
Additionally, Winn and Coales (Denso) Ltd supplied the sub-contractors for this project with Protal 7300™, Denso™ Tape, Denso Profiling Mastic™ and Denso PVC Self-Adhesive Tape™ for protecting gas pipes and fittings which were being diverted to allow construction of the roads. Protal 7300 is a VOC-free moisture-tolerant pipeline coating specially formulated to coat the dry damp or wet exterior pipeline surfaces.
Pre-cast concrete box culverts on the AWPR site.
Lifting of the box culverts into position.
Work is well underway on the AWPR project
Diverted gas pipes were also protected with Denso systems
Denso™ Protection System for Hereford Water Pipeline
Lewis Civil Engineering is currently constructing an 8km length water main pipeline in Hereford for Dŵr Cymru Welsh Water.
Winn & Coales (Denso) Ltd were contacted for information on the most suitable anti-corrosion system along with application training of Lewis Engineers for the pipeline’s Viking Johnson joints. The selected Denso system meets the P2 Civil Engineering Specifications for Water Industry and consists of Denso Primer D™, Denso Profiling Mastic™ and 150mm width Densoclad 70™ Tape. Denso Profiling Mastic is a vital part of the system, it is applied to seal the voids, bolts and heads around the joints to avoid moisture entrapment. Densoclad Tapes consist of a thick polymer-bitumen adhesive, giving superior adhesion and flexibility, laminated to a tough plasticised PVC backing.
It is expected that Lewis Civil Engineering will install more than six hundred 700mm by 600mm joints and nearly two hundred 700mm diameter Viking Johnson joints. In addition to this, there are six 450mm diameter spigot & socket joint pipes. All pipe lengths and joints were supplied in new condition, so no blasting pretreatment was required.
The Denso materials were supplied via Burdens Civil Group, Merthyr Tydfil.
Winn & Coales area manager, top right, trained Lewis Civil Engineering staff to achieve the best application of the Denso P2 System™
Application of Denso Profiling Mastic™ to the joint.
The completed application.
Densostrip™ for Concrete Beach Huts
Raymond Brown Construction Ltd has started to install 119 new concrete beach huts at Milford on Sea. Infrastructure works include a concrete promenade slab, access ramps and steps, and pedestrian walk-way surfacing. These replace the masonry beach huts that were destroyed in a Valentine’s Day storm in 2014.
The new beach huts are being constructed from pre-cast reinforced concrete units to form four individual terraces totaling 250m length. Each terraced section of huts is formed from a culvert placed on its side with an open front. The sealant in each culvert section will play an essential role in ensuring longevity. Winn & Coales’ widely used Densostrip™ sealant was recommended to Raymond Brown Construction by Merchant Suppliers, Resapol of Southampton. Apart from its track record, the immediate availability of Densostrip in 20mm x 25mm sections was also an advantage to the contractor.
Densostrip is a compound rubber and bitumen joint sealing strip for precast concrete units to provide a permanently flexible watertight seal when compressed between joint faces previously primed with Densostrip primer. As well as water and sea water, it is resistant to chemical and biological attack.
In addition to being an effective seal for precast concrete box culverts, other uses include manholes, inspection chambers, shafts, tunnels and pipe sections.
Densostrip™ sealant is applied to each beach hut edge in the pre-cast reinforced concrete terrace units at Milford on Sea
The beach huts destroyed after the Valentine’s Day Storm in 2014
Artist’s impression of the finished beach huts