| Planning & projects
SuperWrap II installers are required to attend and pass a validated training course. The course includes a practical test (as well as a theory exam), in which participants are asked to repair a pipe spool with a simulated defect, which must then pass a certain pressure test.
As a strict rule, a compliant repair must always be conducted by trained installers. The ISO/ASME standards defines repair classes from class 1 to class 3. Class 1 is for low specification duties with least critical conditions such as pressure of <2 MPa and temperature of <40°C and since this is for systems that do not relate directly to personnel safety the repair jobs can be handled by installers alone. Class 2 and 3 however involve more critical scenarios, for example higher pressure and temperature conditions as well as systems transporting hazardous fluids; in those cases therefore the work must be supervised by a certified supervisor who has completed a higher level of training. Periodic annual renewal of qualifications is also compulsory for the installers and supervisors to ensure that they maintain and improve their skills after certification.
All the inspection results, including environmental
measurements, surface roughness achieved by surface preparation conducted, batch numbers of products used, and resulting repair thickness, are recorded in QA/QC documents of each project. And this will be collected on all projects, including information on who was the installer/supervisor involved. After use in service, Belzona SuperWrap II repairs can be revalidated or decommissioned upon reaching its design lifetime, depending on the decision made by the asset owner. Belzona SuperWrap II repair solution is available worldwide through the network of Belzona International Distributors, and the applications can be carried out by trained and validated personnel from third parties as long as they fulfil the prerequisites. By allowing the asset owner to choose who would carry out the design and also who would apply the wraps on-site (as long as those parties are qualified as per the standard), the operator has the flexibility to appoint the contractors best suited, depending on the specific requirements of a project.
Conclusions ● Belzona SuperWrap II is a pipe repair technology
based on a composite material consisting of a two- component epoxy resin and a hybrid reinforcing fibre (carbon fibre/glass fibre).
● Prequalification tests in accordance with both ISO and ASME standards have shown that Belzona SuperWrap II materials have a high level of mechanical properties and are suitable for the compliant pipe repair.
● The composite repair is designed on the basis of engineering strength calculations and is capable of restoring the integrity of damaged pipe materials.
● A system of accreditation and registration of installers/supervisors ensures uniform quality of workmanship and high reliability.
● Belzona SuperWrap II repair, which complies with the ISO/ASME standards, is a reliable long-term repair solution that contributes to the maintenance management of pipework. ●
References
1. ISO 24817:2017, ‘Petroleum, Petrochemical and Natural Gas Industries – Composite Repairs for Pipework – Qualification and Design, Installation, testing and Inspection’
2. ASME PCC-2:2018, ‘Repair of Pressure Equipment and Piping’
3. ALEXANDER, Chris, FRANCINI, Bob, ‘State of the Art Assessment of Composite Systems Used to Repair Transmission Pipelines’, Proceeding of IPC 2006
4.
www.engineeringtoolbox.com
www.waterpowermagazine.com | March 2023 | 47
Top: The pipe repair before the removal of the release film
Middle: Belzona SuperWrap II being applied
Bottom: A Belzona SuperWrap II application before being overcoated with Belzona 5811 (Immersion Grade) for extra protection
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