A Small Hole Can Cause Big Problems, But Belzona Provided The Solution

KHIA ID: 8505
Industry: Chemical & Petrochemical (PETR)
Application: VPF-Valves, Pipes and Fittings (VPF)
Substrate: Carbon Steel
Customer Location: Petrochemical Plant - Southeast Texas
Application Date: 05/23/2021
Products:

Belzona 1511 (Super HT-Metal)

Belzona 1392 (Ceramic HT2)

Problem: The hole was below the fill line in the carbon steel vessel that was operating at 7-10 PSI with a designed temperature range between 120-140C. The customer needed an immediate solution on a Saturday and within 7 hours of the call a Belzona crew was onsite to repair the nozzle. Plant maintenance had placed a hose clamp with rubber patch over the hole and this was included as a defect in the final repair design.
Photograph Descriptions

1 - Vessel location

2 - Through wall on Weld

3 - Finished Job #1

4 - Finished Job #2

Application Situation
A hole in a weld developed due to Corrosion Under Insulation on nozzle of an Acrylic Acetate vessel. The plant needed a solution to get them 3-4 months of service until a turnaround without losing any production time.
Application Method
Application was carried out in accordance with Belzona Know-How System Leaflet VPF-11. The repair area was prepared using spark free vapor blast and tools to clean and roughen the substrate to a near white SSPC SP10 finish. The repair was done in-situ while the vessel was still in operation. Belzona 1511 was used to build up around the hose clamp to achieve a smooth surface for final repair. Belzona 1392 with a reinforcing cloth was then used to wrap the entire nozzle and onto the vessel body with a final coat of 1392 over the entire repair.
Belzona Facts
With a quick response and a fast quality repair Belzona saved the plant from an unplanned outage and hours if not days of down time compared to a conventional nozzle replacement.
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