According to the company’s public relations office, the overhaul was completed in 20 days with more than 44,200 man-hours of work and without any safety incidents. The project focused on removing operational bottlenecks, improving equipment reliability, and strengthening long-term production stability.
For the first time since the plant came onstream in 2004, reactors 4002 and 4004 – considered the core of the aromatics unit – underwent a full technical refurbishment. Internal component failures and catalyst carryover had caused a noticeable decline in performance. With the support of domestic engineering teams and Iranian contractors, the reactors were fully rebuilt and restored to optimal operating condition.
Additional equipment including reactor 3001, reactor 4003, a plate heat exchanger in Area 400, spherical tank 4002, and several process exchangers also underwent major maintenance and restoration. All activities were executed in full compliance with HSE standards.
One of the most notable aspects of the project was that production continued uninterrupted. While selected sections were shut down for overhaul, the remaining units remained online, allowing for sustained output throughout the maintenance period.
Complementary works such as process system cleaning, exchanger leak repairs, catalyst replacement in reactor 3001, and electrical and instrumentation routines were also carried out to ensure long-term equipment reliability.
Bouali Sina officials said the achievement highlights the company’s engineering capability and operational maturity, adding that such model overhauls during online production could serve as a benchmark for other petrochemical complexes across the country.