Inside the Beaumont FCC Turnaround: Units, Scope, and Timeline

Inside the Beaumont FCC turnaround, the scope spans three process units, dozens of major equipment items, and hundreds of individual work orders executed in a compressed timeline. Understanding the units involved, the major scope categories, and the turnaround timeline from pre-shutdown through startup gives vendors the context needed to identify where their products and services fit within the event and when procurement decisions are made for each scope category.

Which units are included in the Beaumont FCCU turnaround?

The Beaumont FCCU turnaround involves three interconnected process units that are brought down together for maintenance. Taking these units down simultaneously is an operational decision driven by the process interconnection between them: the hydrotreaters prepare the feed and treat the product for the FCC unit, and operating the hydrotreaters without the FCC running (or vice versa) creates an uneconomic operating configuration.

The fluid catalytic cracking unit (FCCU) is the primary scope driver. The FCCU consists of a reactor-regenerator system, a main fractionator, gas concentration unit, and associated equipment. The reactor converts heavy gas oil feed into lighter products (gasoline, light cycle oil, slurry) using a hot circulating catalyst. The regenerator burns coke off the spent catalyst and returns it to the reactor. The main fractionator separates the reactor effluent into product streams. Each of these major sections generates its own turnaround scope.

Hydrotreater 1 (the gas oil hydrotreater, sometimes designated the FCC feed pretreater) processes the heavy gas oil feed before it enters the FCC reactor. Treating the feed removes sulfur and nitrogen that would otherwise poison the FCC catalyst and contaminate the product. This unit operates at high pressure and temperature with a fixed catalyst bed that requires periodic changeout.

Hydrotreater 2 (the product hydrotreater) treats one or more product streams from the FCC unit to meet finished product specifications. Depending on the configuration at Beaumont, this may be a naphtha hydrotreater, a distillate hydrotreater, or both. The product hydrotreater scope mirrors the feed hydrotreater in general categories but differs in metallurgy and catalyst formulation.

What are the major scope categories at the FCCU?

The FCCU turnaround scope divides into several major categories, each with its own vendor requirements, procurement timeline, and execution sequence.

Regenerator refractory. The FCC regenerator operates at temperatures approaching 1,300 to 1,400 degrees Fahrenheit and processes a continuous stream of coke-laden catalyst particles. The refractory lining that protects the regenerator shell from these conditions degrades through thermal cycling and erosion. Refractory inspection, spot repair, or full replacement is a standard turnaround scope item. Depending on the condition assessment, refractory scope can range from localized repairs to complete relining of the regenerator interior. This scope is performed by specialty refractory contractors.

Reactor cyclone inspection and repair. Cyclones inside the FCC reactor separate the catalyst particles from the hydrocarbon vapor before the vapor passes to the main fractionator. Cyclone erosion is a primary maintenance driver at FCC units, and cyclone inspection and repair requires confined space entry into the reactor vessel and specialized knowledge of cyclone design and wear patterns.

Main fractionator internals. The main fractionator is a large distillation column that separates the reactor effluent into gasoline-range, light cycle oil, and slurry bottom products. Fractionator tray replacement, downcomer inspection, and packing replacement (if packed sections are used) are typical turnaround scope items. Fractionator internals are heavy, oversized items that require crane access and rigging capability for removal and installation.

Expander compressor overhaul. The FCC unit includes a power recovery train in which expanding flue gas from the regenerator drives a compressor that supplies combustion air back to the regenerator. The expander compressor (sometimes called the power recovery compressor or flue gas expander) is a critical rotating machine that operates in an extremely demanding service environment. Overhaul scope includes rotor inspection, blade replacement, bearing work, and seal replacement. This work is typically performed by the OEM service organization or a qualified rotating equipment contractor.

Heat exchanger service. The FCCU and its associated units contain dozens of shell and tube heat exchangers that transfer heat between process streams. Bundle replacement, retubing, and cleaning are standard turnaround scope items. The most critical exchangers, those in high temperature or high pressure service, are among the long lead procurement items that need to be ordered well in advance of the turnaround. For more on heat exchanger procurement, see Heat Exchangers and Fired Heaters: Who Supplies Gulf Coast Turnarounds.

What does the turnaround timeline look like?

A major FCCU turnaround at a facility the scale of Beaumont typically runs three to five weeks from unit shutdown to unit restart, with pre-shutdown preparation beginning weeks before the actual shutdown date and post-turnaround commissioning and performance testing extending beyond the restart date. The timeline is structured in phases that determine when each contractor and vendor category is active on site.

Pre-shutdown (2 to 4 weeks before shutdown). Material staging, scaffold pre-erection on accessible areas, safety plan reviews, contractor mobilization, and pre-turnaround inspection of equipment that can be accessed while the unit is running. This phase is when the turnaround management team confirms that all materials, contractors, and logistics are ready for shutdown.

Shutdown and decontamination (2 to 4 days). The unit is taken through a controlled shutdown sequence, process fluids are removed, and the equipment is decontaminated (steamed out, chemically cleaned, or purged with inert gas depending on the equipment type) to make it safe for entry and maintenance work. This phase involves the operations team and specialty chemical contractors who provide the decontamination services.

Execution (2 to 4 weeks). The main turnaround work window during which all mechanical, electrical, instrumentation, refractory, catalyst, and inspection scopes are performed. This is the period of peak workforce on site, with hundreds of contractors working simultaneously across the unit. Schedule management during execution focuses on critical path activities: refractory work in the regenerator, cyclone repair in the reactor, and expander compressor overhaul are typically on the critical path.

Startup and commissioning (3 to 7 days). After all work is complete and inspections are approved, the unit is brought through a controlled startup sequence. Catalyst circulation is established, temperatures are ramped up, and the unit is brought to stable operating conditions. Startup is a high-attention period where the operations team, turnaround management, and key contractors are all engaged to address any issues that emerge during the transition from maintenance to operations.

For the procurement timeline context that precedes this execution timeline by 12 to 18 months, see Beaumont FCC Procurement Gates: AML, MRC, and API.

The full buying center map, procurement gates, and timing playbook for the Beaumont FCCU turnaround are inside the vendor intelligence brief.