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Case study 42 – 10 inch flare gas vent

Composite repair of a 10 inch flare gas vent carried out by Engineered Composite Solutions.

Integrity issue

A 10 inch flare gas vent was suffering from external corrosion resulting in wall loss. It was proposed to use a FutureWrap composite repair to reinstate the pipework strength. 



The design of the FutureWrap repair was according to ISO 24817. The design approach was to strengthen taking into account the remaining wall thickness, 3mm, of the steel pipe. The design parameters were; internal pressure 50 bar, temperature 1000C, design lifetime 20 years. The repair design resulted in a thickness of 9mm (11 layers) of FutureWrap Glass/LT composite repair with an axial length of 5800mm.



The installation steps are shown in the photographs from surface preparation through to final curing of the 11 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. 



A 10 inch flare gas vent suffering external corrosion was repaired using a FutureWrap Glass/LT composite repair.  The repair was completed within 6 days allowing the pipework to be returned to its original integrity.


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Initial condition of pipework

Initial condition of pipework

Surface preparation

Initial condition of pipework

Final cured repair

Final cured repair

Engineered Composite Solutions
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Aberdeen AB21 0BH
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