Viking Johnson couplings used on Bulgarian water project
A new £40 million water pipeline network to supply the Bulgarian city of Ruse with drinking water relies on Viking Johnson large diameter couplings for mechanical pipe jointing. The 21km long, 1.2m diameter, water main is being laid between Ruse – the largest Bulgarian city on the River Danube – and natural water sources in the Slivo Pole area to the city's northeast. Viking Johnson, a leading brand within Crane Building Services & Utilities, is supplying almost 70 PN10 and PN16 stepped couplings to join the GRP mains to the ductile iron branch pipes, coping with differences in diameter of up to 30mm on the nominal 1,200mm diameter pipes. They were supplied to the project through the Viking Johnson Bulgarian agent Glynwed EOOD. The Ruse project is scheduled to be completed by 2011. It's being carried out for local utility V&K by German-based contractor Meyer & John and local pipe laying subcontractor Raicommerce. Consulting engineers are Dutch firm Royal Haskoning and EGIS BCEOM International, of France.
In other news, a specialist diving team – working in a cramped, water-filled tunnel 20m beneath the surface of the UK's Grizedale Reservoir – completed installation of a 450mm bore Viking Johnson eccentric plug valve to control water flow for United Utilities. The tunnel – 1.8m wide and 1.7m high – under an earthen embankment dam built in 1866 takes water from the 332,000m³ reservoir to a pump house from where it's sent to the nearby Barnacre North Reservoir before it flows under gravity to the treatment works at Franklaw. As well as the valve, Viking Johnson provided a bespoke actuation system, a specially-designed hydraulic power pack and an emergency hand pump facility for the hydraulic system which permits the valve to be operated in the event of electrical supply failure. The system also includes almost 400m of stainless steel braided hydraulic hose lines running between the valve and pump house. A team of 10 divers winched the valve and actuator, weighing almost three quarters of a tonne, along the tunnel on a specially designed trolley. They used a decompression chamber housed on a floating pontoon above the submerged tunnel entrance to permit them to work for up to 70 minutes at a time.
Viking Johnson, Hitchin, Hertfordshire, UK, www.vikingjohnson.com
Deva role for Franklin Hodge in Romania
Franklin Hodge, Hereford, Herefordshire, UK, www.franklinhodge.com
New floating cover aids dam/reservoir owners
A VapourGuard floating cover on your dam/reservoir brings many benefits including preventing evaporation and algae growth, while still collecting rainfall. It's for facilities storing water typically used for irrigation, agriculture, hydroponics, mining and drinking water. For example, installations in Australia include for wine growers, cattle farmers, poultry breeders and salt exporters.
A recent installation for an Australian wine grower is benefiting it by:
- Keeping water cooler and cleaner – the light top surface of the products reflect the sun's heat and a dark underside prevents light penetrating the surface, inhibiting algae growth
- Collecting rainfall – through small drainage holes
- Reducing contamination
- Eliminating water evaporation by +98%
In addition, VapourGuard has: 1) strong welded seams to join cover sections together, 2) perimeter anchorage to prevent the wind lifting the cover, and 3) a 5-year pro-rata warranty against UV breakdown of the membrane. A bubble material that's dual extruded from 540-µm thick polyethylene, it's supplied to fabricators around the world in roll form, 2m and 2.5m wide x 90m.
Plastipack Ltd, St Leonards-on-Sea, UK, www.plastipack.co.uk
'WALL-E' robot keeps water on track in Dunoon
In other news, Bristol Water recently invited Panton McLeod to carry out a demonstration of its VR600 and ROV (a smaller robot manoeuvred like a submarine) units at the Timsbury Reservoir to show how they could be used in water storage facilities across the region. Due to the particular access hatch at the tank, Panton McLeod got to showcase another new piece of technology, a special A-frame and electric hoist system to lower the machines into the water tank safely, as there wasn't enough space to use its standard tripod-and-winch system. Lastly, Panton McLeod also successfully carried out its first-ever inspection contract with Folkestone & Dover Water Services at a facility in Kent that it hopes will lead to more work in the region. The firm was hired to inspect an underground water storage tank using its ROV unit.
Panton McLeod Ltd,Melrose, Roxburghshire, Scotland,www.pantonmcleod.co.uk