A boiler failure in an FMCG plant is not a maintenance event — it is a production shutdown. Steam drives pasteurisation, CIP, cooking, drying, and packaging heat sealing simultaneously. A pressure relief valve that has not been tested, a water treatment programme that has drifted out of specification, or a steam trap that has failed open — any of these produces consequences that range from lost production to catastrophic equipment failure. Boiler systems are also the most heavily regulated utility in a food plant: annual inspections, pressure vessel certification, and water treatment records are legal requirements, not optional documentation. This checklist covers every maintenance task for a complete boiler and steam system in an FMCG facility — from daily water chemistry checks to annual pressure vessel inspection — structured for use in OxMaint to auto-schedule every task and produce the compliance records required for insurance, regulatory, and audit inspection.
1. Daily Boiler Operations
Daily boiler checks are the first line of defence against developing faults. A low water level that is caught at 07:00 during the shift start check is a 5-minute correction. The same low water level missed until the low-low cutoff trips is a production shutdown and a potential vessel damage event. Log every parameter, every day, against the boiler asset record.
2. Water Treatment Programme
Boiler water treatment is the single most important factor in boiler longevity and efficiency. Scale 1mm thick on heat transfer surfaces reduces thermal efficiency by 7–10% and raises flue gas temperature by 20–30°C. Oxygen pitting from inadequate deaeration can perforate a pressure vessel in months. Both are entirely preventable with a disciplined water treatment programme.
3. Safety System Inspections
Boiler safety systems are not PM items — they are legal requirements with defined test frequencies. A pressure relief valve that has not been tested within the required period is a compliance failure regardless of whether it appears functional. All safety system tests must be documented with the date, result, and the name and certification of the person who conducted the test.
4. Steam Trap Survey and Maintenance
Failed steam traps are the single largest source of avoidable energy loss in steam distribution systems. A failed-open trap in a 10-bar system discharges flash steam equivalent to the output of a small domestic boiler — continuously, invisibly, directly to drain. A plant with 50 steam traps and a 15% failure rate is losing the equivalent of one working boiler to drain every day. Survey frequency depends on system pressure and criticality; quarterly is the minimum for any food plant steam system.
5. Combustion Efficiency and Energy Optimisation
A boiler at 80% thermal efficiency costs 20% more to operate than one at 100%. In a food plant running a 10 MW boiler at 8,000 hours per year, a 5% efficiency improvement is worth £100,000–£150,000 in fuel cost annually. Combustion analysis is the tool that identifies where the efficiency loss is — excess air, flue gas temperature, CO concentration, and O₂ level together define the complete combustion picture.
6. Statutory Compliance and Documentation
Boiler compliance documentation is not optional additional paperwork — it is a legal requirement in every jurisdiction. Operating a pressure vessel beyond its inspection due date voids the operating certificate, voids the insurance cover, and in most jurisdictions exposes the plant manager and engineer personally to prosecution. All records must be retained for the life of the vessel, not just the current certification period.
