SAQCC Gas LPG Commercial/Industrial study plan
SAQCC Gas LPG Commercial/Industrial · Give each week a clear focus.
8 weeks · About 6 hours per week
Liquefied Petroleum Gas (LPG)
Explain the physical properties of LPG (vapour pressure, specific gravity, calorific value, flammability limits) and relate them to safe handling
Identify the components of a commercial LPG installation (bulk tank, vaporiser, regulators, pipework, safety devices)
Calculate the cylinder/tank capacity required for a given appliance load using consumption tables
Interpret the key requirements of the relevant LPG installation standard for commercial/industrial systems
Your checkpoint
A one-page summary sheet of LPG properties and a worked example sizing a bulk tank for a 200 kW commercial kitchen load.
Liquefied Petroleum Gas (LPG)
Describe the procedures for leak testing, purging, and commissioning an LPG system
Outline emergency response actions for LPG leaks, fires, and asphyxiation risks
Explain ventilation and separation distance requirements for LPG storage and use
Compare vapour draw vs liquid draw systems and their applications
Your checkpoint
A step-by-step commissioning and emergency response checklist for a commercial LPG installation.
Natural Gas
Explain the properties of natural gas (methane number, specific gravity, Wobbe index, flammability limits) and their impact on combustion
Identify the components of a commercial/industrial natural gas installation (meter, regulator, pipework, valves, flueing)
Calculate gas flow rates and size pipework for a given load using standard tables
Describe combustion characteristics and the requirements for safe flueing and ventilation
Your checkpoint
A pipe sizing calculation for a 150 kW commercial boiler installation, including a schematic diagram.
Natural Gas
Outline the procedures for tightness testing, purging, and commissioning natural gas systems
Explain the operation of gas detection and safety shut-off systems
Describe the maintenance and inspection requirements for commercial gas appliances and controls
Identify common faults in natural gas systems and their diagnostic steps
Your checkpoint
A fault-finding flowchart for a natural gas commercial boiler system, covering at least five common faults.
Air Conditioning and Refrigeration Gas
Explain the properties and safe handling of refrigerants used in air conditioning and refrigeration (including HFCs, HFOs, and natural refrigerants)
Describe the refrigeration cycle and the function of major components (compressor, condenser, expansion device, evaporator)
Interpret pressure-enthalpy diagrams to determine system performance and diagnose faults
Outline the environmental regulations and requirements for refrigerant recovery, recycling, and record-keeping
Your checkpoint
A labelled diagram of a vapour-compression refrigeration cycle with an explanation of the state of the refrigerant at each point.
Air Conditioning and Refrigeration Gas
Perform leak detection, evacuation, and charging procedures for refrigeration systems
Explain the safety precautions for handling refrigerants (pressure, toxicity, flammability, oxygen displacement)
Describe the commissioning and maintenance requirements for air conditioning and refrigeration systems
Identify the causes and remedies for common system faults (e.g., high discharge pressure, low suction pressure, icing)
Your checkpoint
A refrigerant handling and leak-testing procedure sheet that includes safety checks and environmental compliance steps.
Compressed Industrial and Medical Gases
Classify compressed industrial and medical gases by hazard and identify their properties
Explain the design and safe use of gas cylinders, manifolds, and pressure regulators
Describe the requirements for safe storage, handling, and transport of compressed gas cylinders
Outline the procedures for leak testing and safe operation of medical gas pipeline systems
Your checkpoint
A hazard classification table for at least eight common industrial/medical gases with their key safety precautions.
Liquefied Petroleum Gas (LPG) & Natural Gas & Air Conditioning and Refrigeration Gas & Compressed Industrial and Medical Gases
Review and consolidate key concepts from all four domains using summary notes and flashcards
Complete a timed mock examination covering all domains and review incorrect answers
Identify weak areas and create a focused revision plan for each domain
Practice explaining safety procedures and calculations aloud to reinforce understanding
Your checkpoint
A completed mock exam with a score report and a personal revision checklist for the final week before the exam.
Milestones
Week 2: Can explain LPG properties, sizing, and emergency procedures without notes, and has completed the commissioning checklist.
Week 4: Can size natural gas pipework, describe tightness testing, and diagnose common faults; has completed the fault-finding flowchart.
Week 6: Can explain the refrigeration cycle, perform leak detection and charging procedures, and identify environmental compliance requirements.
Week 7: Can classify compressed gases, describe cylinder safety, and outline medical gas pipeline procedures; has completed the hazard table.
Week 8: Achieves at least 70% on the mock exam and has a targeted revision plan for weak areas.