Free boiler annual service procedure

• The MapTrack boiler annual service procedure contains 12 checks across 7 sections. Sections covered: Internal Inspection, Pressure Testing, Burner Service, Gaskets and Seals, Electrical and Controls, Ancillary Systems, Compliance.
• Internal inspection: full internal inspection (tubes, shell, fireside, waterside for scale, corrosion, pitting), refractory and insulation inspection.
• Pressure testing: hydrostatic pressure test at 1.5x working pressure per AS 3788.
• Burner service: clean or replace nozzles, adjust air/fuel ratio, combustion efficiency test with flue gas analyser.

Learn more about maintenance and work orders in MapTrack.

• Pressure vessel integrity: the internal inspection and hydrostatic test confirm the boiler shell and tubes are structurally sound, preventing the most serious type of equipment failure.
• Regulatory compliance: AS 3788 compliance inspection is a legal requirement for registered pressure vessels. Documented annual service records satisfy WorkSafe and insurance auditors.
• Maximum efficiency: a full burner service with combustion analysis ensures the boiler is burning fuel at the optimal air/fuel ratio, reducing fuel costs and emissions.
• Extended boiler life: annual internal inspection catches scale, corrosion and pitting before they compromise vessel integrity. Refractory repairs prevent hot spots and heat loss.
• Prevent unplanned shutdowns: gasket replacement, control calibration and comprehensive testing reduce the risk of mid-season failures that leave the building without heating or process steam.
• Insurance requirements: most boiler insurance policies require annual inspection by a competent person. Failure to comply may void coverage.

• Internal inspection: full internal inspection (tubes, shell, fireside, waterside for scale, corrosion, pitting), refractory and insulation inspection.
• Pressure testing: hydrostatic pressure test at 1.5x working pressure per AS 3788.
• Burner service: clean or replace nozzles, adjust air/fuel ratio, combustion efficiency test with flue gas analyser.
• Gaskets and seals: replace all gaskets (manhole, handhole, inspection covers).
• Electrical and controls: full electrical test, calibrate all safety and operating controls.
• Ancillary systems and compliance: inspect economiser and condensate return, efficiency test (O2, CO, CO2, stack temperature), AS 3788 compliance inspection, update boiler log book and compliance certificate.

1. Complete all monthly service tasks first. Refer to the monthly service procedure for the full checklist.

   Sign off each monthly task on the procedure form before starting annual items. This includes safety relief valve lift test, low water cutoff test, burner inspection, water chemistry sampling, blowdown and flue inspection.

2. Shut down the boiler and allow it to cool to a safe temperature for internal access. Isolate fuel, electrical and water supplies.

   Follow the manufacturer cool-down procedure, which typically takes 12-24 hours for larger boilers. Apply lockout/tagout to the fuel supply valve, main electrical isolator and feedwater supply. Confirm all isolation points with a second person.

3. Open manhole and handhole covers. Perform a full internal inspection of tubes, shell, fireside and waterside surfaces. Look for scale, corrosion, pitting and erosion. Inspect refractory and insulation for cracks, spalling and hot spots.

   Use a torch and inspection mirror to examine all accessible surfaces. Measure scale thickness with a scraper or gauge. Photograph any areas of concern for comparison at the next annual inspection. Record the location and severity of any pitting or corrosion found.

4. Perform the hydrostatic pressure test at 1.5 times the maximum allowable working pressure per AS 3788. Hold pressure for the required duration and inspect for leaks or deformation.

   Fill the boiler with water and pressurise using a calibrated hydrostatic test pump. Hold the test pressure for at least 30 minutes (or as specified by AS 3788). Walk around the entire vessel and check every fitting, flange, weld and penetration for leaks or weeping.

5. Service the burner: clean or replace nozzles, adjust the air/fuel ratio, and perform a combustion efficiency test using a flue gas analyser (measure O2, CO, CO2, stack temperature).

   Remove and inspect the burner nozzle for carbon build-up or erosion. Replace if the spray pattern is uneven. Adjust the air damper and fuel valve to achieve optimal O2 levels (typically 3-5% for gas, 4-7% for oil). Record all flue gas readings on the service form.

6. Replace all gaskets (manhole, handhole, inspection covers). Reassemble and prepare for recommissioning.

   Use new gaskets of the correct material and thickness for the operating pressure and temperature. Torque flange bolts in the correct sequence and to the manufacturer specification. Do not reuse old gaskets, as compression set reduces sealing effectiveness.

7. Perform a full electrical test of safety controls, limit controls, flame safeguard and ignition sequence. Calibrate all safety and operating controls.

   Test each safety limit control by simulating fault conditions (high pressure, low water, flame failure). Verify the flame safeguard controller locks out within the specified time. Calibrate the operating pressure control and modulating controls using a calibrated reference gauge.

8. Inspect the economiser (if fitted) and condensate return system.

   Check the economiser tubes for external corrosion and internal fouling. Inspect the condensate receiver tank, pumps, float switches and return piping for leaks. Verify the condensate pump cycles correctly and the return temperature is within the expected range.

9. Complete the AS 3788 compliance inspection. Update the boiler log book and compliance certificate.

   The competent person or inspection body completes the AS 3788 report documenting all findings, test results and any conditions or recommendations. Update the boiler log book with the inspection date, next due date and any required follow-up actions. Issue an updated compliance certificate.

10. Record any defects or recommendations in the notes section. Set the next monthly and annual service due dates. Sign off.

    List all defects found, their severity, corrective actions required and responsible persons. Set the next monthly service date one month from recommissioning and the next annual service date 12 months from this inspection. Obtain sign-off from the service technician and the boiler operator or facility manager.

Practical answers about the form, record keeping and using MapTrack.

This form is a starting point. Check the current requirements that apply to your equipment, work and location. The form alone does not establish compliance.

• AS 3788:2024 - Pressure equipment - In-service inspection, including current amendments (approved inspection and testing strategy)
• AS 1210:2010 - Pressure Vessels (design and construction requirements)
• AS 1228:2006 - Pressure Equipment - Boilers (requirements specific to boiler design and operation)
• WHS Regulations 2011, Chapter 5, Part 5.1 - Registration and Inspection of Pressure Equipment

• Model WHS Regulations (Safe Work Australia)
• AS 1210-2010, Pressure vessels (Standards Australia)

MapTrack publishes this template. The linked authorities publish their own guidance; they haven't endorsed this form.

• Boiler monthly service procedure
• Facility maintenance checklist
• Maintenance management (MapTrack)
• Compliance management
• Facilities management
• Plant compliance
• Safety inspection checklist