Jacking-up with Denso

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 1 February 2001

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Keywords

Citation

(2001), "Jacking-up with Denso", Anti-Corrosion Methods and Materials, Vol. 48 No. 1. https://doi.org/10.1108/acmm.2001.12848aab.012

Publisher

:

Emerald Group Publishing Limited

Copyright © 2001, MCB UP Limited


Jacking-up with Denso

Jacking-up with Denso

Keywords: Winn & Coales (Denso), Coatings

Winn & Coales report that, having found that previous coatings were only giving 12 months' protection for its De Long jack-up barge, Titan Maritime (UK) Ltd of Newhaven, Sussex, has switched to the company's Denso.ST Epoxy system following extensive trials.

The jack-up barge or platform can be compared to a barge that climbs up the legs to provide a general working platform with accommodation and engine room for the compressor and generators, below. It has a 1,500 tonnes lift capacity. The three legs are 30m in length, but can be extended so that the jack-up barge can work in up to 50m water depths on a hard bottom. The barge is 26m by 20m, with a moulded depth of 3.5m, with a 7m wide slot penetrating 15m in from her stern, making her a three-sided U-shape. Known as the Katja, she was purpose built at Le Havre in 1978 for EDF, the French electricity generating company.

Typical of some of its uses in UK waters has been for pile driving, jetty repairs, lifting large buoys and providing a floating stage for a production of Shakespeare's play, The Tempest. The latter was between the piers at Brighton and incorporated a firework display from the Katja.

Titan Maritime Industries Inc., the US parent company, also owns two other jack-up barges, currently working in Venezuela and Brazil.

Denso ST Epoxy has been applied to all surfaces of the Katja except the legs, which need to retain a rough surface for the jacks to grip on. It is a mastic coating claiming exceptional adhesion properties. It can be spray or brush applied to deliver long-term protection in a wide range of corrosive environments.

Winn & Coales also informs us that it has received an order from Andaray Engineering of Gateshead who are supplying 1,800 pre-stressing tie bars to Kvaerner Construction for use in a redecking project for the Dartford Tunnel. Six hundred 2.5m x 25mm diameter bars and 1,200 2.5m x 32mm bars are being produced at Gateshead.

For long-term protection Andaray Engineering are applying Winn & Coales' Denso Primer D, followed by Densopol 60 tape, as specified by the client. They devised their own system for application of the strongly adhesive Densopol Tape.

Densopol 60 Tape is a rubber/bitumen compound coated on to a fabric reinforcement and backed with a conformable pvc film. Owing to its great flexibility Densopol 60 may be used for wrapping small-to-medium diameter bars and pipes and also for more complex contours such as fabrications and valves.

Further details are available from Winn & Coales (Denso) Ltd. Tel: +44 (0)20 8670 7511; Fax: +44 (0)20 8761 2456.

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