The design and construction of 3 No. Above Ground Installations along the route of a 210 kms x 1220mm gas pipeline at Herbrandston, Newton Noyes and Derwen Fawr, and 2 No. block valves at Llangynog and Llanwdra. Works included procurement, construction (civil, piping, electrical and controls) and commissioning of the new facilities.
Location: Avonmouth and Partington, England
Client: National Grid LNG Storage
LNG Tanker Loading
Construction of LNG tanker loading bays, weigh bridges, deluge, fire detection, CCTV and gas alarm system, and access roads. Insulated LNG pipelines, water ballast and air pipelines were fabricated and tested at both the Avonmouth and Partington facilities.
Location: Dynevor Arms, South Wales, Wales
Client: National Grid LNG Storage
LNG Tanker Loading
Dynevor Arms LNG Tanker Loading Bay. Contract involves extensive modifications to an existing Liquefied Natural Gas (LNG) storage facility near Merthyr Tydfil, comprising the design and construction of stainless steel pipework (suitable for LNG @ -165oC), control valves for LNG duty, instrumentation, the design and installation of PLC based control & safety system, fire detection and deluge system. Also extensive bunding & drainage works, CCTV cameras and control kiosks were installed.
Location: RAF Fairford, England
Client: MOD
Design and Construct
RAF Fairford - The design and construction of an aviation fuelling system, pipelines, tanks, HV ring main, garages, pavement and control buildings.
Location: Heathrow Airport, London, England
Client: Laing O'Rourke
Aviation Fuel Lines
Installation of 550m of twin 24” diameter steel pipelines to reinforce aviation fuel supplies to the Central Terminal Area at Heathrow Airport. Two large and complex valve chambers were also constructed on a very restricted site, adjacent to the taxiway and security fencing. Night-time working was required to tie-in to the new supply in the existing system.
Location: St. Fergus, Aberdeenshire, Scotland
Client: National Grid
Aftercooler
Refurbishment of an existing HP gas aftercooler at St Fergus Terminal near Aberdeen. Works included the re-installation of the aftercooler fans – a total of 36 new fan assemblies with each fan measuring 3 metres in diameter. The scope included procurement, installation and commissioning of a complete new motor control centre with all related electrical and instrumentation works.
Location: Manchester Airport, England
Client: Costain
Aviation Fuel Lines
The construction of 7 No. new aircraft stands at Manchester Airport in two sections of work.
Stands 6A & 6B – extension of existing fuel hydrant system to provide fuelling for 5 No. new stands.
B1D Area – connection to existing live fuelling system to provide fuelling to 2 No. new stands – a total of 160m of 6” pipeline.
Location: Bacton Terminal, Norfolk, England
Client: Interconnector (UK)
Boiler House
Construction of a new reinforced boiler house to accommodate four 10MW boilers. The 400 sq m boiler house was founded on 91 No. 350mm diameter piles. A reinforced concrete control building was constructed along with pipe rack foundations, comprising 175 No. 350mm diameter piles, topped off by pile caps and concrete beams.
Location: South & East England, England
Client: National Grid
Process
The contract embraced 75 No. sites throughout the South and East of England, investigating and rectifying nitrogen sleeve pipeline protection systems on 7 – 38 bar welded steel pipelines. Solutions, where required, ranged from inlet/exhaust valve and riser repair, to inlet/exhaust renovation, followed by grout injection to completely fill the annular void. Renewed gas installations were tested on completion to ensure integrity. Grout injection was via a hopper fed screw pump, generating pressure up to 25 bar. Scope included all related building, civil engineering works, liaison with landowners and permanent reinstatement on completion.
Location: RAF Fairford, England
Client: DEUSF
Aviation Fuel Lines
A design, construct & commission contract for the replacement of the North East Loop Hydrant Fuel System, comprising the construction of two new part buried, steel fuel storage tanks with concrete jackets, installation of a total of 7 km x 250 mm stainless steel and carbon steel fuel pipelines, 2 No x 3 pump pumping stations, aircraft hydrant pits, loading and dispense systems and 5000 sq metres of vehicle hard-standing. New buildings include an RC filter house, an RC control building, a vehicle inspection building, and a 320 sq m single storey POB (Petroleum Operations Building) in traditional build with enhanced fire protection and security features.
Electrical works included a major extension to the 11kv ring main, the construction of two 11kv sub-stations complete with step-down transformers and LV pillars. The provision of 2 standby generators ensured independence of grid supply.
A fuelling hydrant - fully automated with control, instrumentation and actuation systems driving six pumps drawing fuel from the two new storage tanks via a filtration plant, was also constructed.
Demolition & decommissioning of the existing fuelling installation and supply-only of fuelling pantographs and a de-fuelling cart completes the scheme.
Location: Huntingdon & Cambridge, England
Client: National Grid
Compressor Stations
Works included the replacement of existing chequer plate flooring in two cabs in the Huntingdon and Cambridge Compressor Stations for Transco, with line-weld floor gratings, to allow water to drain away when the new fire suppression water mist system is used. At the Cambridge Compressor Station, partition walls made of galvanised steel were also installed around the discharge pipes in order to enable the compressor be sealed off when the mist system was activated.
Location: Heathrow Airport, London, England
Client: BPA
Aviation Fuel Lines
This contract comprises the provision of a new supply to Stand L24 from one of the paralleled 18” HSC feeder line and decommissioning the hydrant lines in the vicinity of the HSC tower. The works was executed in three separate phases.
Phase 1 – Stand L24, installation of new pipeline between the 16” HSC line and one of the two HSC 18” feeder lines, a new low point drain and temporary vent on the capped end of the HSC line, which was to be abandoned. Also included were the capping of both ends of the 16” line, drain down and tie-in’s of the new pipework.
Phase 2 – Stand K25 & L26, installation of a new hydrant pit on the 16” HSC line and low point drain. Cap both ends of the 16” HSC line where the cut was made for the new hydrant pit. We were required to re-fill the 28” and 16” HSC lines and drain the 16” CHOU line and install a new hydrant pit and low point drain on this line.
Phase 3 – Re-fill the CHOU line and grout fill the abandoned section of the 16” HSC and CHOU lines.
Location: Stanton St John, Steeple Claydon and Tackley, England
Client: National Grid
Pressure Reduction Station
Replacement of existing Pressure Reduction Station at three locations in North Oxfordshire. The contract included demolition of the existing PRS at each location, removal of existing pipework, and the fabrication and installation of new pipework and instrumentation.
Location: RAF Brize Norton, England
Client: Defence Estates
Aviation Fuel Lines and Pumps
Construction of a fuel and de-icer dispenser bay with all drainage, petrol interceptors, roads, gates and fencing. Mechanical & Electrical works included submersible pumps installed into four existing underground tanks containing diesel, contaminated fuel, glycol and de-icer.
Location: Heathrow Airport, London, England
Client: Hhopco
Aviation Fuel Lines
The contract comprised an extension of the fuel supply lines to Terminal 4 at Heathrow. The 22 week first phase comprised the installation of 700m of 20” diameter steel pipe from stand W41 (the end of the current fuel line) to stand V18. This allowed fuel to be cross-connected with the existing 16” main. This phase also included two open-cut taxiway crossings and one tunnelled taxiway crossing.
Phase 2 involved the construction of a 4.5m square by 4m deep valve chamber on stand V18. The stand was live throughout the operation with aircraft being offloaded and refuelled within feet of the construction site. The final phase provided a new valve chamber on stand T8.
Location: Moffat, Scotland
Client: Transco
Compressor Station
The contract comprised the construction of 550m of 900mm high pressure steel gas pipeline between feeders 11 and 12. A third party feed to the Bord Gais Eirran Interconnector was also constructed to enable supplies between Ireland and the UK to be increased. The work undertaken was extremely complex, the new pipes being laid in rocky ground in close proximity to existing pipelines and compressor cabs. The new pipes were tied into the system upon completion using Hot Taps, a process which involves the welding and connection to live pipelines by drilling without interrupting the supply.
Location: Hamble to Booley Green, Hampshire, England
Client: ESSO
Aviation Fuel Lines
London Jetline. Main Contractor for the Design, Supply and Construction of a 10 km x 250 mm dia welded steel aviation fuel pipeline from Hamble to Booley Green in Hampshire just north of the M27. This pipeline followed a highly challenging urban route punctuated with road, rail, river crossings, heritage gardens sites, ornamental water gardens.
Location: London City Airport, England
Client: Air BP
Aviation Fuel Lines and Tanks
The installation of 500,000 Litre aviation fuel tanks, associated pipework, control, power, instrumentation and civil works, with responsibility for procurement, civil works, E & I works, fabrication, coating, testing and commissioning. Major challenges included construction on a live aviation fuel site adjacent an operational airport and the logistics of building in London.
Location: Heathrow, London, England
Client: Air BP
Design & Construct
The construction of two aviation fuel tanks, each of 2650m3 capacity, all related civil and mechanical engineering works including major diversions to existing pipelines, fire fighting system, control and telemetry system. A design and construct project executed in partnership with Air BP.