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YPF - La Plata, Argentina. 1994 FCC "A" turnaround

PhotoReport
Orifice plate and guide erosion [view a full-size image] 73Kb Jpg file
Bonnet cover and steam bushing erosion [view a full-size image] 69Kb Jpg file
Steam bushing erosion [view a full-size image] 83Kb Jpg file
Eroded stem [view a full-size image] 42Kb Jpg file
Wear plate machining after welding [view a full-size image] 84Kb Jpg file
New orifice plate [view a full-size image] 48Kb Jpg file
New orifice plate, detail [view a full-size image] 51Kb Jpg file

PROBLEM: Overhaul five slide valves, originally not manufactured by Remosa. Approximately six months before the turnaround, YPF invited Remosa to a technical meeting to evaluate the situation. Pictures from the previous turnaround were produced, which resulted very helpful in planning well in advance the required repair work. YPF signed a lump sum contract, which also included the supplying of new internal parts for each valve and the removal and the subsequent application of a new abrasion resistant lining on valve bodies.

Eroded disc

Moreover, Remosa was in charge of coordinating local subcontractors, local transportation of the valves (refinery-workshop-refinery), insurance and start-up.

TECHNICAL DATA:

• Process: Exxon
• spent catalyst slide valve H2, A 516 Gr. 70 (hot wall design)
• regenerated catalyst slide valve H4, S.S. 304 H (hot wall design)
• regenerated catalyst slide valve H6, S.S. 304 H (hot wall design)
• flue gas double disc slide valve H17, S.S. 304 H (hot wall design)
• two-port diverter valve H18, S.S. 304 H (hot wall design)

SOLUTION: The repair work was performed at a local workshop, previously selected and qualified by Remosa. The internal parts on stock at YPF were checked to verify the current needs of the refinery. Remosa was able to manufacture all the internal parts even without the original manufacturing drawings, not supplied by the valve manufacturer.

Hex-mesh installation

The new parts were manufactured at Remosa's main plant, in Italy, and shipped semi-finished to the qualified workshop in Argentina for final machining. This last operation was performed once the valves had been removed from the line and the exact measurements had been taken.

WHAT THE CUSTOMER HAD TO SAY: "[...] We can recommend Remosa for their performance, punctuality and compliance with YPF requirements."

Copyright © REMOSA spa 1998-2001 Last updated on April 27, 1999