Composite Repairs to Complex Shapes
- Status:
- Complete
- Project Reference Number:
- NIA_NGGD0094
- START DATE:
- END DATE:
Project summary
- Funding Licensee(s):
-
- National Grid Gas Distribution
- National Grid Gas Transmission
- Northern Gas Networks
- SGN
- Wales & West Utilities
- Funding mechanism:
-
- Network Innovation Allowance
- Research area:
-
- Others
- Technology:
-
- Gas Distribution Networks
- Expenditure:
- £999,999
Summary
Documents
The work proposed below will be undertaken in three stages;
Stage 1
- Development of a composite repair design methodology document
- An analytical/numerical study to identify an optimum fitting size for testing in Stage 2 and Stage 3
- Testing for possible debonding due to pressure reduction/depressurisation
- Long term (fatigue) testing of bends
Stage 2
- Static testing of Tees
- Long term (fatigue) testing of Tees
- Stiffness and flexibility studies of repaired Tees
Stage 3
- Assessment of environmental variables on composite performance
Benefits
The success criteria for the work proposed will be;- Verification and implementation of new technology enabling repairs of part through-wall, blunt, metal loss defects associated with complex shaped geometries at a reduced cost and reduced downtime compared with conventional techniques/methods.
- A consistent approach to the repair of part through-wall, blunt, metal loss defects for the UK gas transmission and distribution system.
- Verification of the ISO recommendations and industry practice guidance for the design and installation of composite systems, and development of a comprehensive guidance document governing the design and installation of composite systems.
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