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

The objectives of the scope of work proposed are;

• Development of a guidance document detailing the design and installation requirements for the repair of part-wall, blunt, metal loss defects associated with complex geometry components
• Verification of the suitability of the composite repair system through full scale testing supported by analytical and numerical analysis, as appropriate
• Assessment of environmental variables on the integrity of the composite repair.

• 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.