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Projects: Projects for Investigator
Reference Number NIA_NGGD0070
Title PRISM (Pipe Replacement in situ Manufacturing) - Material Lifetime Testing
Status Completed
Energy Categories Fossil Fuels: Oil Gas and Coal(Oil and Gas, Refining, transport and storage of oil and gas) 100%;
Research Types Applied Research and Development 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Metallurgy and Materials) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Project Contact
No email address given
Cadent Gas
Award Type Network Innovation Allowance
Funding Source Ofgem
Start Date 01 May 2016
End Date 01 November 2017
Duration 18 months
Total Grant Value £299,597
Industrial Sectors Technical Consultancy
Region London
Programme Network Innovation Allowance
Investigators Principal Investigator Project Contact , Cadent Gas (100.000%)
Web Site http://www.smarternetworks.org/project/NIA_NGGD0070
Objectives The completion of these tests will provide a key determinant in the assessment of the technical viability of the PRISM solution. Of the two reports being produced from this project, the first will provide interim confirmation of the ability of the applied resin layer to resist the initial internal and external loading as the host pipe begins to deteriorate and fail. This will inform a decision to continue with the remaining programme activities. The second and final report will complete the assessment of the ability of the applied resin layer to continue to resist the applied loading throughout the lifetime of the installation. This will confirm that the lifetime of the resin material is sufficient to validate the technical and commercial viability of the solution, leading to full commercialisation.
Abstract Under the HSE’s Enforcement Policy for the Replacement of Iron Gas Mains 2013-2021, all Tier 1 iron mains are to be decommissioned by the end of 2032 or earlier. National Grid Gas (NGG) has commissioned a programme of work, known as Pipe Replacement In Situ Manufacture (PRISM), to develop a new pipe replacement technique, which incorporates the application of a spray applied resin. Using this technique, the existing cast iron pipe is used as a former to allow the new pipe to be established through the PRISM application process. A proof of concept study has already been undertaken (Project Ref. NIA_NGGD0054 refers) and whilst some further development is required, it has established the process for potential use in cast iron gas distribution pipelines. As the current definition for decommissioning of the host cast iron pipe suggests that any replacement pipe is required to be a stand-alone system, with no support from the host pipe following installation, there is a need to better understand the performance and potential lifetime of the new PRISM installation. The proof of concept study considered some of the application requirements in terms of sealing existing corrosion holes and cracks, accommodation of ferrules and plugs etc. The next set of testing should consider the impact of subsequent failures of the host pipe following PRISM application e. g. as the host pipe starts to deteriorate and begins to fracture. There are a number of tests that can be done to establish whether the applied PRISM can withstand the initial host pipe fracture as well as accommodate the fracture long term e. g. as the host pipe continues to move with the surrounding ground over time. The testing will confirm whether the applied resin layer can maintain its integrity as the host pipe is subjected to a range of axial and vertical movements.Note : Project Documents may be available via the ENA Smarter Networks Portal using the Website link above
Publications (none)
Final Report (none)
Added to Database 09/10/18