The works were completed in advance of providing supply to the local distribution network, including the new Cherrywood Town Centre Development.

PROJECT OUTLINE

BBCLG / Gas Networks Ireland engaged Murphy Ireland to construct a new Above Ground Installation (AGI) 6km south of Sandyford AGI at Laughanstown on a green field site. The project scope included a hot-tap off the existing Sandyford to Bray 40 bar Transmission pipeline with a new 300m long pipeline to connect to the AGI. The works were completed in advance of providing supply to the local distribution network, including the new Cherrywood Town Centre Development.

The Works included:

  • Clearing of hedgerows, boundaries and placing material to build up existing ground to new AGI formation level.
  • Installation of Hot-Tap and Valve.
  • Construction of 300m of 8” steel transmission pipeline.
  • Archaeological monitoring of the spread.
  • Full reinstatement of land affected by pipeline construction.
  • Construction of a new AGI including civil & mechanical works, testing & commissioning and landscaping.
  • Electrical & Instrumentation installation.

KEY CHALLENGES

The Project scope included the construction of a new AGI, a hot-tap off an existing pipeline and a cross-field pipeline to connect to the new station.

The project was completed within a 3rd party site with continuous liaison with the developer that included co-ordination of site deliveries through a large building development, and the widening of some local roads to accommodate delivery of new Pressure Reduction Skid and Package Boiler Unit buildings.

Murphy assisted the Client with Value Engineering proposals throughout the change process to ensure that the best solution was chosen.

When the new AGI was commissioned, and the station was ‘live’ all finishing works required strict control under GNI Permit to Work systems. This was further backed up by BBCLG and MIL control systems.

PROJECT DELIVERY AND INNOVATIONS

Through careful planning of the works Murphy succeeded in prefabricating a large quantity of components required off-site. This ensured that welding and coating could be carried out to the highest safety and quality standards in fabrication shop conditions rather than on-site.

No excavated material was removed from site throughout the project. Murphy worked with the Client to ensure material was reused and avoided transport to landfill. This had obvious cost and environmental benefits.

KEY FACTS

  • Works carried out accident free.
  • All welding, inspection, testing and commissioning carried out through direct delivery.
  • Completed AGI provided gas to local distribution network including the new Cherrywood Town Centre development.

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