Challenges
- Urgent leak seal
- Through-wall defect
Benefits
- Cost-effective and timely repair
- No hot work or shutdown required
Scope
One of the world’s leading energy trading and shipping companies contacted ICR to complete an urgent leak seal, and subsequent engineered composite repair, aboard its liquefied natural gas (LNG) tanker located off the coast of Africa.
The vessel, one of the world’s largest LNG tankers, had suffered a through-wall defect caused by external corrosion on a 24-inch carbon steel tee section in a seawater line. The affected area was identified at a suction point in a deep ballast tank, located on the starboard side towards the aft section of the vessel.
The project scope included performing an urgent leak seal, delivering an engineering design calculation complete with design sketch, and providing the materials and personnel to install the Technowrap™ repair.
Solution
ICR mobilised trained UK technicians and materials to the vessel at the onboarding port. By working closely with the onboard crew and onshore support, ICR maintained effective communication throughout the successful repair process. While the technicians were onboard, ICR also supported the vessel crew by demonstrating the live leak seal procedure in case any initial repairs were required while awaiting an LR-approved repair.
The live leak seal was completed using Technoseal Epoxy Putty. Once the live leak seal was complete, the client mechanically prepped the affected surface area achieving a cleanliness of ST3, and a minimum surface roughness of 40 microns.
ICR’s technician then applied the composite repair which used a combination of Technowrap 2K™, a multi-directional glass cloth, and a high ambient (HA) resin. A successful leak seal test was completed after the first two layers were applied, before the subsequent 10 layers were installed.
Result
The project was successfully completed within five day shifts. ICR was able to quickly mobilise materials and personnel to the vessel and meet the urgent repair needs within the desired timeframe and budget.
Completed while avoiding any hot work or shutdown, this project showcased the advantages of using ICR and Technowrap™ for live leak seal and composite repairs.
Please click here for more on our Technowrap™ composite repairs or to get in touch with our team.
