Maintenance is an essential undertaking as part of our role to keep the high pressure gas National Transmission System (NTS) safe, fit for purpose and operating in an efficient and economic manner, in line with our various obligations.
In order to facilitate work on the NTS, it is sometimes necessary to take an outage of a part of the network or reduce the flexibility available (e.g. where steady flows may be required). This may affect one of more parties connected to the network including:
We are also incentivised on some aspects of our maintenance activities.
Primarily the work that affects our customers is as a result of routine maintenance, asset replacement, pipeline and defect inspections, emergencies and faults and work to facilitate investment in the network which may be as a result of a new connection or capacity requirement (common maintenance types).
We aim to minimise the impact of our maintenance on customers through transparency, aligning our work with their outages as appropriate and facilitating customer needs for flexibility.
Each year we ask when our customers' outages are to enable alignment of works. If your outages move, please get in touch as early as possible so that we can consider whether we can also realign our works to reduce any impact of these works.
If you would like to talk to us regarding alignment of works please contact us at
Sometimes standard maintenance approaches may not be optimal for our customers. Where this is the case the Minor Works Agreement can enable parties to agree different maintenance approaches through a bilateral contract with directly connected customers. Customers can pay the incremental costs of working flexibly outside normal working practices where we are able to accommodate these requests. For example:
If you would like more information, please get in touch or have a look at our standard Minor Works Agreement and Minor Work Request template.
If you would like to talk to us about potential options, please contact us at;
In working with our customers to plan our system access requirements, we consider maintenance requirements, forecast supply and demand patterns as well as outage programmes from relevant and impacted industry parties to facilitate alignment of work where feasible to reduce its impact.