Water and Effluent Treatment Magazine
Issue link: https://fhpublishing.uberflip.com/i/1085585
10 PIPES & DRAINAGE 2019 It is regularly reported that one of the water utilities' main objectives is to reduce the amount of leakage from their distribution systems. Leaks can occur for lots of reasons, but one of the most common is corrosion. New pipe lengths are usually supplied with a factory-applied corrosion prevention coating, but this can easily become damaged and most pipe couplings require nuts and bolts to fasten them, which are extremely vulnerable to corrosion. To remedy this, the P1 and P2 Civil Engineering Specifi- cations for the Water Industry (7th Edition) were issued which cover the protection of ferrous pipes, joints and fittings using anti-corrosion and sealing materials prior to burial. Winn & Coales (Denso) Ltd has manufactured and supplied P1 and P2 anti- corrosion systems for many years. The Denso system comprises (a‰er cleaning) an initial coat of Denso Paste over the entire area followed by Denso Profiling Mastic to fill voids and form a smooth profile prior to wrapping. The whole joint is then wrapped with Denso Tape (petrolatum) for the P1 spec. When a tougher level of protection is needed, the P2 system is used, which comprises Denso Primer D, Denso Profiling Mastic and Densoclad Tape (bitumen laminate). The system is easy to apply but care must be taken to use the products correctly, particularly when filling voids with profiling mastic. Missing this stage and wrapping Denso Tape over a void will create a pocket where water can enter, build up and lay, causing rapid and extensive corrosion to the surrounding area. The enormous wasted cost and serious environmental issues caused by incorrect or incomplete system applica- tions affects everyone, but Denso offers free product application training, either on site or at its training centre in London, to ensure its products are always applied correctly. PIPES & DRAINAGE 2019 Increase the service life of your water pipelines with Denso Contact: Denso House, Chapel Road, London, SE27 0TR Telephone: 020 8670 7511 Email: mail@denso.net Website: www.denso.net PREVENT LEAKAGES; SAVE WATER! TEL: +44 (0) 208 670 7511 FAX: +44 (0) 208 761 2456 EMAIL: mail@denso.net www.denso.net WINN & COALES (DENSO) LTD A MEMBER OF WINN & COALES INTERNATIONAL INCREASE THE SERVICE LIFE OF YOUR WATER PIPELINES AND FITTINGS WITH DENSO ® • OUR CORROSION PREVENTION SYSTEMS HELP TO REDUCE THE RISK OF COSTLY REPAIRS AND WATER LOSS • FULLY COMPLIANT WITH P1 & P2 CIVIL ENGINEERING SPECIFICATIONS FOR THE WATER INDUSTRY • FREE APPLICATION TRAINING AVAILABLE • CONTACT US FOR MORE INFORMATION BS EN ISO 9001:2015 & 14001:2015