Page 21 - Gi flipbook - October 2018

creation and utilisation of
Engineering Campaign Decision FIGURE 3 3D rehearsal of the lifting FIGURE 4 Example of a block valve pipe-
Panels (CDP) to empower decision operation and the completed lift through at Higham, in the Midlands
making across departments.
Our small, unique, self-sufficient
team of nine full-time NG employees
(making up five per cent of project
management overheads at present) is
experienced and competent in multi-
disciplinary end-to-end project delivery.
During the design phase, NARC
generated 3D images and completed
virtual rehearsals to aid stakeholder
engagement, improve process safety
assessments, verify constructability and
reduce cost and program uncertainty.
The campaign developed modular
block valve designs achieving efficiency
via a standardised design solution. This
design allows efficient offsite
fabrication, safe offsite hydrostatic
testing and therefore minimises
network outage periods for installation.
NARC has completed six national
feeder pipe-throughs of priority FIGURE 5 Example of a new gas actuator at FIGURE 6 High efficiency gearboxes at
selected block valves with asset Crieff, in Scotland Rockland St Peter, in East Anglia
health issues throughout the UK, with
significant cost savings compared with
replacing the block valve.
The campaign has delivered over 30
actuator and control cabinet
replacements, rectifying operator
issues in Scotland, East Anglia and the
South West. This success was down
to significant engagement with system
operations, network engineering,
operations and independent network
offtakes during the design and
construction phases.
As part of the campaign, 30 high FIGURE 7 An example of a refurbished
efficiency gearboxes were installed on AGI, including painting and coating, pipe
faulty, locally-operated valves, support intrusive P/11 surveys, remedial
replacing hydraulic and electric repairs, and sand box installations
actuators and successfully realising
£825k of financial and operational
benefits from reduced material and
installation costs.
NARC has designed, constructed FIGURE 8 Modular block valve 3D design,
and installed six national block valve developed by NARC
full site rebuilds and one network
offtake full site rebuild. Activities
included offsite fabrication and
hydrotest, excavation, contracted lift
of two assembly sections, tie-in welds
and non-destructive testing (NDT),
coating, cathodic protection, backfill
and all site civil work.
In 2017, key suspect pipeline
corrosion works were incorporated into the concrete plinth. The NARC team compressor station tee. The 36in
NARC for delivery. To check for has inspected beneath more than 100 valves and associated pipework and
corrosion of the pipeline, the works saddle supports throughout the UK. equipment were replaced, providing
included removal of the support Another of the projects delivered critical isolations between the
around the pipeline, often requiring in 2017/18 was the completion of the compressor station and Feeder 3.
complete removal and replacement of redesign and build of Cambridge This included all operating

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