Our response to coronavirus

Find out how we're working to keep the electricity and gas flowing reliably throughout the outbreak.
National Grid workers working on an underground gas pipe
Completed

Innovation

Composite pipe supports and composite transition materials

London

Replacing and repairing failed seals on pipes that exit our concrete inspection pits will become safer and less expensive thanks to our removable CTP project.

Historically, when seals failed on gas pipes exiting concrete walls, costly, high-risk works involving the breaking out of steel and concrete were required to inspect and repair them. The project addressed these issues by developing a composite gas transition seal unit, which plugs the gap between pipe and wall (pictured). Technicians can easily remove it, inspect the pipe for corrosion or damage, and then replace it in a fast and simple operation.