Case Studies

We will be updating our case studies regularly so please check back as often as you can to read about the type of services we can offer. We will also be actively updating our blog with the latest H&V Fusion news.

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Isle of Grain CHP Station, Kent

Developed by E-ON, the 1,275MW gas fired combined cycle technology Power Station will be capable of supplying enough electricity for around a million homes.

In addition, by combining proven gas turbine and combined cycle technology with CHP (combined heating and power) the scheme is expected to reduce carbon emissions by around 350,000 tonnes a year. ALSTOM Power identified H&V Fusion and Drilling as a key partner to provide some of the necessary services involved in this project.

Some facts:
CHP Station
H&V’s project began around September 2008 and is still continuing
A range of pipe work from 32mm up to and including 355mm has been installed to provide a range of services throughout the facility.

These include:
1500m of pipe and fittings for the Fire Main
600m for the incoming Water Main
2500 m for the Processed Water, Boosted Water and Recovery Water Main

A Station
800m of 400mm pipe and fittings for the diversion system for the outfall to sea for the existing Power Station plant

Demin line
1500m of 225 mm pipe and fittings to link services from the A Station to the new CHP Plant

Cardiff Bay

H&V Fusion and Drilling have been involved in several projects immediately within the Cardiff Bay Development area.

Projects have included the provision or supply of both Gas and Water Mains to facilities such as:

The Millennium Centre
Planet Ice, Cardiff ice rink
The Yacht Club
Toys R Us
Harry Ramsden’s

Celtic Manor Resort, Ryder Cup Venue 2010

The latest addition to the works H&V have been involved in at the Celtic Manor Resort is – The new and exciting International Convention Centre Wales which has taken inspiration from the world’s best convention centres.

The result of this exciting joint venture between the Welsh Government and the Celtic Manor Resort: a stunning venue specifically designed for world class conventions, events and meetings.

H&V had the privilege to be involved again at the venue to be part of the contraction team on this project providing the gas and water infrastructure. Working under John Sisk, we were involved on site intermittently for just over a year, with completion of the Centre in 2019.

Previously The Celtic Manor Resort was chosen to host one of the most prestigious events in the sporting calendar, the 2010 Ryder Cup Challenge between Europe and the United States of America, attracting the world’s best golfers, golf enthusiasts and sports fans from around the Globe.

An immense amount of work has been done to make this one of the best Golf courses in any location in any country. Wales is especially proud to be hosting this event at the Celtic Manor, which will showcase both the grounds and the unrivalled facilities available at the Resort.

H&V Fusion and Drilling were contracted to undertake several projects which were required to be brought in on time and to budget.

A total of 2500 metres of 180mm pipe line have been installed using both butt fusion and electro-fusion welding, to provide water services to the resort, along with additional pipe work to provide water for the top-up reservoirs around the course. The final part of the project was to provide water to the new Media Centre and Tented Village in readiness for the tee-off on October 1.

Coniston Hydroelectric, Cumbria

Situated in a picturesque location on Church Beck, Cumbria above Coniston, the project was initiated by local landowners and the Lake District National Park after the original site fell into disuse in the 1950’s when the National Grid was erected across the Lake District. The project was detailed to be in keeping with the local surroundings and to minimise impact on the environment. H&V were commissioned to provide 1000m of continuous welded Polyethylene which would carry the services under the required pressure, providing lower friction of the service and achieving a cost within budget.

Hindhead Tunnels, A3 Surrey

The Hindhead Tunnels were commissioned to provide relief to the A3 (a major route between London and Portsmouth) carriageway in Surrey. For a scheme that provided benefits to the environment and also reduced journey times, major works were undertaken to remove the trunk road from Hindhead Village and from the Devil’s Punchbowl, a famous National Landmark designated a Site of Special Scientific Interest and part of a Special Protection Area. The tunnel would be the longest non-estuarial tunnel in the UK, and contains some of the most advanced, state of the art systems in communications, surveillance and safety.

H&V Fusion and Drilling were Sub-Contracted by Balfour Kilpatrick to provide the Fire Main for Tunnels exits and entries.

Some facts:

Over 3000m of 250mm SDR11 PE Pipe were laid to supply the water for the Fire Main System

1300m of Petrotechnic fuel line was installed and 400m of Hobas fibreglass pipe work were installed to carry fluid to the drainage sump, through a separator and out via the main drainage system.

The main welding technologies used were a combination of both electro-fusion and butt fusion.

Kingsway Tunnels, Liverpool

The Kingsway Tunnel is a road tunnel under the River Mersey in Merseyside, Liverpool, and runs between
Liverpool and Wallasey. It is one and half miles (2.4 km) long and is often called the Wallasey Tunnel to distinguish it from
the older Queensway Tunnel. Annual traffic figures are 13.5 million vehicles per year.The tunnel was constructed over a
five-year period between 1966 and 1971, after the Queensway Tunnel became unable to cope with modern volumes of
traffic. It was opened in June 1971 by Queen Elizabeth II.
In a study following the fire in the Mont Blanc Tunnel in 1999, inspectors from the European Union rated the Kingsway
Tunnel as “good”, one of only eight to receive that rating in Europe. Following the deterioration of the pipe work carrying
the fire main, it became necessary to replace the entire pipe work throughout the Tunnel in 2011.
H&V were commissioned to undertake the replacement of the pipe work on both external approaches to the Tunnels.
In addition, we would manage all Underground Mapping Surveys and Road Traffic Management to facilitate the works.
Additional contractors would also be employed for the civils works.
The project has been one of the most challenging to date, involving the use of butt welding and electrofusion techniques,
as well as utilising directional drilling, slip-lining and pipe bursting technologies.
One particular section involved a contract crane lift to position the drilling rig, which was achieved with the help of our
specialised sub-contract partners.
Originally, open cut trenches were suggested, but H&V recommended using these alternative technologies helping
reduce both cost and the impact on the environment, whilst maintaining the flow of traffic throughout the Tunnels
supporting the links between Liverpool and Wallasey.

Pipe and fittings used: 2.5km of 90mm SDR11, 125mm SDR11 and 180mm SDR11 HPPE were used throughout
the project.
Testing: Each completed section of pipe would be hydraulically pressure tested to Type 2 standard
Chlorination: Each section Chlorinated to BS8558
32 pits excavated, re-instated and sealed
180m slabbed pathway laid along retaining wall above the Wallasey approach
Steel stairway installed on the Wallasey embankment