14 inch crude oil cargo line
Case study 37
Composite repair of a 14 inch crude oil cargo line carried out by Engineered Composite Solutions.
Integrity issue
A 14 inch crude oil cargo line was suffering from local internal corrosion resulting in a through wall defect close to a flange. The through wall defect was temporarily sealed. It was proposed to use a FutureWrap composite repair to reinstate the pipework strength and provide a long term seal over the temporary mechanical seal.
Design
The design of the FutureWrap repair was according to ISO 24817. The design approach was to strengthen and locally leak seal. The assumed defect size was a fully circumferential slot of width 1250 mm. The design parameters were: internal pressure 2 bar, temperature 400C, design lifetime 3 years. The repair design resulted in a thickness of 5 mm (6 layers) of FutureWrap Glass/LT composite repair with an axial length of 2150 mm.
Installation
The installation steps are shown in the photographs from surface preparation through to final curing of the 6 layers of the FutureWrap Glass/LT repair. Full QA/QC measurements were made to demonstrate that the FutureWrap repair was applied in accordance with ISO 24817.
Summary
A 14 inch crude oil cargo line suffering internal corrosion was repaired using a FutureWrap Glass/LT composite repair. The repair was completed within 5 days allowing the pipework to be returned to its original integrity.
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Initial condition of pipework
After surface preparation and profiling
During repair application
