Utility Subway Metallic Mains Replacement

The latest in a series of Calls for Innovation seeks potential solutions to a problem area identified by a Gas Distribution Network (GDN). This call is focused on replacing aging metallic pipelines located inside specifically constructed utility tunnels within the city of London.


Across the UK, GDNs have been replacing aging metal pipes with plastic gas mains at an accelerated rate, under the advice of the Health & Safety Executive. The Iron Mains Replacement Programme (IMRP) addresses public concerns regarding the failure of iron gas mains.


The vast majority of buried iron mains are replaced using PE insertion techniques.  However, due to the added potential risk of fire within vented subways these methods cannot currently be used. Alternatively, relocating pipes in utility subways by conventional open cut methods employed on the public highway is expensive and disruptive to customers.


The network is seeking a technique to insert PE or other liners into medium pressure metallic mains with a size range 24″ to 48”, ideally greater than 500m, including suitable end fitting.  The solution must provide adequate fire protection, ideally without reliance on the structural integrity of host main.


The network is looking for a whole system approach to installation and maintenance within any proposal.


Find out more about this call for innovation here.


To register initial interest and request an expression of interest form please call the Energy Innovation Centre on 0151 348 8040 or alternatively enter your details online and quote the reference number GDN-18-02.


Please note, specific EOI forms are created for each individual Call for Innovation and the matching form will be required to progress any submissions.


The closure date for registering initial interest is 22 June 2018.  Please note office open hours are between 9am and 5pm Monday to Friday.