Gas Transmission Networks
The project scope is designed to develop a risk based model for prioritisation of high pressure gas above ground installation integrity
management and maintenance activities. Taking into account the threats posed by different damage mechanisms such as corrosion,
vibration, over pressure, low temperature, fatigue assessments on individual installations, this type of prioritisation system is a new
concept and will better enable the prioritisation of resources to the highest risk installations.
This work will determine how National Grid can best make decisions for prioritising maintenance and inspection for high pressure gas
installations to maintain their availability for use by customers whilst meeting our safety obligations.
The project will use information from around the world including Europe, US and Asia from research bodies such as EPRG and PRCI
to define the appropriate risk profile and consider the various options for above ground installation inspection and management. The
work will consider the location, the failure mechanism likelihoods for installation assets and the prevention and mitigation measures in
place for individual assets and the entire installation.
National Grid’s expenditure on the inspection and maintenance of its National Transmission System above ground assets is in the
region of £4M per annum. The tool will be able to rank installations against each other for their propensity for failure and will help
National Grid make informed choices for investing funds in maintenance and/or inspection activities for higher risk installations and
ensure that we can continue to meet our customer and safety obligations in the most efficient way.
The project will therefore deliver both a specific piece of new equipment and also a novel operational practice