Most of the hours in a plant shutdown go into maintenance work: opening and cleaning exchangers, overhauling valves and pumps, repairing vessel internals, replacing corroded piping, testing relief valves and maintaining electrical and instrument equipment. The plant’s own maintenance team rarely has the capacity to do all of this in a few weeks. Shutdown maintenance support services provide the crews, supervision and specialist capability to deliver it within the window. This overview explains what the support covers and how it is usually delivered.
What are shutdown maintenance support services?
Shutdown maintenance support services supply qualified crews, supervision, specialist services and quality records for the maintenance work carried out while a plant or unit is offline, working within the plant’s planning, permit and inspection systems.
Typical shutdown maintenance scope
| Equipment or work type | Typical activities |
|---|---|
| Heat exchangers | Opening, bundle extraction, cleaning, inspection, repair, reassembly and testing |
| Columns and vessels | Manway opening, internals inspection and repair, cleaning, box-up |
| Valves | Overhaul, replacement and relief valve testing |
| Rotating equipment | Pump and compressor overhauls, seal and bearing replacement, alignment |
| Piping | Replacement spools, line breaking, flange management |
| Fired heaters | Tube inspection, burner and refractory work |
| Electrical and instrumentation | Motor and switchgear maintenance, instrument calibration, valve positioner work |
| Support trades | Scaffolding, insulation, painting and rigging |
Mechanical work is planned through detailed packages, described in mechanical work packages during plant shutdowns, and exchanger work in heat exchanger maintenance during turnarounds.
How support is delivered
Crews under the plant’s management
The provider supplies trades and supervisors who work to the plant’s own planning and supervision. This suits plants with strong internal shutdown management.
Work packages delivered by the contractor
The contractor takes responsibility for defined packages, such as all valve work or a unit’s exchangers, including supervision and records.
Specialist services
Specific activities that need special equipment or skills, such as hydrojetting, bundle extraction or relief valve testing.
Most shutdowns combine all three.
Working inside the plant’s systems
Shutdown maintenance support works best when it fits the plant’s existing processes: work orders from the CMMS, the plant’s permit system, its inspection plan and its quality requirements. Contractors that run parallel systems create duplicate records and confusion over what is complete. The routine maintenance relationship that often sits behind shutdown support is described in process plant maintenance services.
Planning the support with the plant
Agree early which packages the provider will take, which crews it will supply, how supervision will work, how shifts are covered and how emergent work is handled. Share draft work packs with the provider well before the shutdown, so it can confirm crew sizes, special tools and materials it is responsible for. Providers brought in at the last minute work from assumptions, and assumptions are where shutdown delays start.
Common problems with shutdown maintenance support
- Crews arriving without the competency evidence the plant requires
- Supervisors unfamiliar with the plant’s permit system
- Night shifts staffed more thinly than the plan assumed
- Records completed days after the work instead of at the time
Quality and inspection during maintenance
Every repair, joint and test needs to meet the plant’s standards, with records to prove it. Inspection and quality controls specific to shutdown work are covered in inspection and quality controls during shutdown maintenance.
Finishing properly
A job is not finished when the last bolt is tightened. It is finished when it is inspected, tested, documented and handed back. The steps involved are set out in closing out shutdown work packages.
What clients should expect from a provider
- Crews and supervisors experienced in operating plants and permit systems
- Competency evidence for every worker before arrival
- Supervision on every shift, including nights
- Records completed as work progresses
- Honest daily progress reporting
Shutdown maintenance support from Apex Core Engineering
Apex Core Engineering supplies mechanical, electrical and instrumentation crews, support trades and supervisors for shutdown maintenance through its skilled manpower supply service, assessed before deployment and mobilized to the shutdown schedule.
Frequently asked questions
What work is usually done during a plant shutdown?
Inspection and maintenance that needs equipment offline, such as exchanger cleaning, vessel inspection, valve overhaul, relief valve testing and piping replacement.
Should shutdown maintenance contractors use the plant’s systems?
Yes, wherever possible. Using the plant’s CMMS, permits and inspection plan avoids duplicate records and confusion over completion.
How are relief valves handled in a shutdown?
They are typically removed, tested and reset on a test bench, repaired if needed, and reinstalled with records before startup.
Discuss shutdown maintenance support with Apex Core Engineering.