Gas Course

Lesson 1 • Units of Measurement and Conversion

Introduces pressure, flow, volume, and energy units used in gas work. Accurate unit conversion prevents calculation errors in design and commissioning tasks.

Lesson 2 • Physical and Chemical Properties of Gas

Examines density, flammability limits, ignition temperature, and calorific value. These properties directly govern safe handling and system design decisions.

Lesson 3 • Introduction to Gas Types and Uses

Covers natural gas, liquefied petroleum gas, and industrial gases and their primary applications. Establishes the vocabulary and context needed for all subsequent chapters.

Lesson 1 • Personal Protective Equipment for Gas Work

Covers selection, inspection, and correct use of PPE specific to gas environments. Proper PPE use reduces exposure risk when engineering controls are insufficient.

Lesson 2 • Regulatory Framework and Competency Requirements

Surveys the regulatory obligations, competency schemes, and documentation standards governing gas work. Compliance protects workers, customers, and the practitioner's professional standing.

Lesson 3 • Risk Assessment for Gas Operations

Teaches systematic hazard identification, likelihood-consequence analysis, and control hierarchy. Students apply these tools to real gas work scenarios throughout the course.

Lesson 4 • Emergency Response and Incident Procedures

Outlines actions for gas leaks, fires, and exposure incidents including evacuation and first aid. Rapid, correct response minimises harm and limits property damage.

Lesson 1 • Meters, Governors, and Regulators

Covers meter types, governor operation, and pressure regulation at the service entry point. Correct interpretation of meter readings and governor settings is critical for commissioning.

Lesson 2 • Service Pipes and Entry Points

Examines service pipe materials, sizing, routing, and entry requirements into buildings. Proper installation prevents leaks and ensures adequate supply pressure at appliances.

Lesson 3 • Bulk Storage and Cylinder Supply Systems

Addresses LPG bulk tanks, cylinder manifolds, and associated pressure regulation equipment. These systems serve sites without mains gas and require distinct installation practices.

Lesson 1 • Pipework Routing, Support, and Protection

Specifies spacing of pipe supports, protection from mechanical damage, and routing through voids. Correct support prevents stress fractures and maintains long-term system integrity.

Lesson 2 • Jointing Methods and Fittings

Covers compression, press-fit, threaded, and welded joints along with approved sealants. Each method has specific application limits that must be matched to pipe material and location.

Lesson 3 • Purging and Commissioning Pipework

Details safe purging procedures to displace air before introducing gas and verify tightness. Correct purging sequence prevents ignitable air-gas mixtures from forming inside the system.

Lesson 4 • Pipework Materials and Selection Criteria

Compares steel, copper, corrugated stainless steel tubing, and polyethylene for gas service. Material choice affects corrosion resistance, flexibility, and permitted installation locations.

Lesson 1 • Flue Installation and Termination

Specifies materials, joints, support intervals, and terminal locations for compliant flue installation. Poorly terminated flues allow combustion products to re-enter buildings.

Lesson 2 • Flue Types and Design Principles

Compares natural-draft, fan-assisted, and balanced flue systems and their design constraints. Correct flue selection ensures reliable combustion product removal under all operating conditions.

Lesson 3 • Ventilation Requirements for Gas Appliances

Calculates permanent ventilation openings needed for open-flued and flueless appliances. Adequate ventilation prevents oxygen depletion and carbon monoxide accumulation in occupied spaces.

Lesson 4 • Combustion Chemistry and Products

Explains stoichiometric combustion, excess air, and the formation of carbon monoxide and soot. Recognising incomplete combustion signs is essential for diagnosing dangerous appliance conditions.

Lesson 1 • Appliance Types and Operating Principles

Surveys boilers, cookers, water heaters, and space heaters and explains their combustion cycles. Knowing how each appliance type functions guides correct installation and fault diagnosis.

Lesson 2 • Commissioning Checks and Performance Verification

Establishes the sequence of gas rate checks, combustion analysis, and safety device tests. Systematic commissioning confirms the appliance operates within design parameters.

Lesson 3 • Handover and User Instruction

Prepares technicians to demonstrate appliance operation, explain safety features, and provide documentation. Effective handover reduces misuse and supports ongoing safe operation.

Lesson 4 • Gas Connection and Flexible Hose Use

Covers rigid and flexible connection methods, approved hose types, and connection torque requirements. Incorrect connections are a leading cause of gas leaks at appliance inlets.

Lesson 1 • Tightness Testing Principles and Methods

Covers working pressure tests, let-by tests, and standing pressure tests for various system sizes. Selecting the correct test method ensures leaks are detected without damaging components.

Lesson 2 • Systematic Fault Diagnosis Methodology

Introduces a structured diagnostic process: symptom analysis, hypothesis testing, and root cause confirmation. A systematic approach reduces diagnostic time and avoids misdiagnosis.

Lesson 3 • Leak Detection Techniques

Demonstrates leak detection fluid, electronic gas detectors, and pressure decay analysis. Each technique has sensitivity limits that determine where and when it should be applied.

Lesson 4 • Common Faults and Remediation Strategies

Catalogues frequent gas system faults including ignition failure, pressure loss, and valve defects. Knowing typical failure modes accelerates diagnosis and guides correct repair choices.

Lesson 1 • Energy Auditing and Performance Reporting

Applies consumption data analysis, benchmarking, and improvement reporting to gas-heated buildings. Structured audits identify savings opportunities and support client investment decisions.

Lesson 2 • High-Efficiency Condensing Boiler Technology

Examines condensing heat exchanger design, seasonal efficiency ratings, and condensate management. Maximising condensing operation reduces fuel consumption and carbon emissions significantly.

Lesson 3 • Controls, Zoning, and System Optimisation

Covers programmable thermostats, weather compensation, load compensation, and zone control valves. Intelligent controls deliver comfort while minimising gas consumption across varied building types.

Lesson 4 • Hydrogen and Biomethane Blending

Surveys hydrogen blending trials, biomethane injection, and appliance compatibility considerations. These emerging fuels require modified materials, seals, and combustion settings.