Boiler Maintenance Course

Lesson 1 • Boiler Types and Industrial Applications

Covers fire-tube, water-tube, and electric boiler designs and their typical use cases. Establishes the classification framework used throughout the course.

Lesson 2 • Steam and Water Properties

Covers saturation curves, steam quality, enthalpy, and pressure-temperature relationships. Grounds technicians in the fluid behaviour that governs safe boiler operation.

Lesson 3 • Core Components and Their Functions

Identifies shells, drums, tubes, headers, and furnace sections and explains each part's role. Provides the component vocabulary needed for all maintenance tasks.

Lesson 4 • Boiler Ratings, Codes, and Standards

Introduces design pressure, maximum allowable working pressure, and applicable construction standards. Sets the regulatory baseline for all inspection and maintenance decisions.

Lesson 1 • Low-Water Cutoff Devices

Covers float-type and probe-type low-water cutoffs, their wiring, and functional testing. Prevents the most common cause of catastrophic boiler failure.

Lesson 2 • Safety Valves and Pressure Relief Devices

Explains how safety relief valves function, their set-pressure requirements, and testing intervals. Directly supports the technician's duty to verify life-safety devices.

Lesson 3 • Boiler Hazards and Risk Assessment

Catalogues pressure, thermal, combustion, and chemical hazards specific to boiler environments. Provides the risk-awareness foundation for all subsequent safety practices.

Lesson 4 • Personal Protective Equipment and Lockout/Tagout

Specifies PPE requirements for boiler work and details energy-isolation procedures. Establishes the personal safety habits applied in every hands-on chapter.

Lesson 1 • Blowdown Practices and Control

Covers surface and bottom blowdown frequency, manual and automatic blowdown valves, and heat recovery. Proper blowdown maintains water quality while minimising energy loss.

Lesson 2 • Water Chemistry Fundamentals

Covers pH, hardness, alkalinity, dissolved oxygen, and total dissolved solids as they affect boilers. Establishes the chemical baseline for all treatment decisions.

Lesson 3 • Feedwater Treatment Methods

Explains softening, deaeration, and chemical dosing as primary feedwater conditioning strategies. Connects treatment selection to boiler pressure class and operating conditions.

Lesson 4 • Scale, Corrosion, and Deposit Control

Identifies calcium carbonate scale, pitting corrosion, and caustic gouging and their treatment remedies. Directly links water chemistry failures to maintenance and repair costs.

Lesson 1 • Combustion Air Systems

Explains forced-draft fans, dampers, air-fuel ratio controls, and combustion air proving switches. Adequate air delivery is essential for safe and efficient combustion.

Lesson 2 • Gas Burner Components and Operation

Covers gas trains, pressure regulators, control valves, and ignition systems for natural gas burners. Builds the component knowledge needed for gas-side maintenance tasks.

Lesson 3 • Oil Burner Systems and Fuel Handling

Addresses fuel oil grades, storage, heating, atomisation, and nozzle selection for oil-fired boilers. Prepares technicians to maintain oil-side equipment and prevent fuel-related failures.

Lesson 4 • Flue Gas Analysis and Combustion Tuning

Covers portable analyser use, O2/CO2/CO measurement, and stack temperature for combustion optimisation. Technicians use data to reduce fuel consumption and emissions.

Lesson 1 • Pressure and Temperature Instrumentation

Covers Bourdon-tube gauges, pressure transducers, thermocouples, and RTDs used on boilers. Accurate instrumentation is the foundation of safe pressure and temperature control.

Lesson 2 • Control System Calibration and Testing

Covers loop calibration, functional testing of interlocks, and verification of safety shutdowns. Calibrated controls ensure the boiler responds correctly to all operating conditions.

Lesson 3 • Water Level Control Systems

Explains single-element, two-element, and three-element feedwater control and their tuning parameters. Stable water level is critical to preventing low-water damage and carryover.

Lesson 4 • Programmable Controllers and HMI Interfaces

Introduces PLC-based boiler controllers, HMI navigation, alarm management, and data logging. Modern control platforms require technicians to interpret digital displays and trend data.

Lesson 1 • Daily and Weekly Operator Checks

Details gauge readings, water level verification, blowdown, and safety device checks performed each shift. Consistent daily checks are the first line of defence against boiler failures.

Lesson 2 • Annual Boiler Inspection Preparation

Explains shutdown sequencing, draining, internal cleaning, and documentation needed before inspector arrival. Proper preparation ensures a thorough and efficient annual inspection.

Lesson 3 • Pressure Vessel Internal Inspection

Addresses visual inspection of tubes, welds, refractory, and pressure parts for corrosion and cracking. Internal findings drive repair decisions and fitness-for-service evaluations.

Lesson 4 • Monthly and Quarterly Maintenance Tasks

Covers low-water cutoff testing, water treatment sampling, strainer cleaning, and control calibration. These periodic tasks address wear and drift not visible in daily checks.

Lesson 1 • Combustion and Burner Faults

Addresses ignition failures, flame instability, sooting, and lockout conditions with their probable causes. Combustion faults are among the most frequent and consequential boiler problems.

Lesson 2 • Water-Side and Steam-Side Faults

Covers priming, foaming, carryover, water hammer, and low-water conditions and their corrective actions. Water-side faults can escalate rapidly and require prompt, accurate diagnosis.

Lesson 3 • Diagnostic Methodology and Fault Trees

Introduces structured troubleshooting logic, fault tree analysis, and symptom-to-cause mapping. A repeatable methodology prevents guesswork and reduces diagnostic time.

Lesson 4 • Pressure Part Leaks and Structural Faults

Identifies tube leaks, gasket failures, valve packing leaks, and refractory damage and their repair priorities. Pressure part integrity faults require immediate assessment and controlled response.

Lesson 1 • Tube Repair and Replacement Techniques

Covers tube rolling, seal welding, plugging, and full tube replacement procedures and quality checks. Tube integrity is the most critical factor in boiler pressure vessel safety.

Lesson 2 • Valve and Fitting Overhaul

Details disassembly, lapping, packing replacement, and reassembly of steam, blowdown, and safety valves. Properly overhauled valves are essential for pressure control and safe operation.

Lesson 3 • Auxiliary Equipment Overhaul

Covers feedwater pump, forced-draft fan, and heat exchanger overhaul procedures and acceptance criteria. Auxiliary reliability directly supports continuous boiler availability.

Lesson 4 • Return-to-Service Testing and Commissioning

Explains hydrostatic testing, controlled light-off, safety device verification, and performance baseline after repair. A structured return-to-service process confirms the boiler is safe before full load.