Product Overview

Summary: This Natural Gas Conversion Safe Operating Procedure provides a clear, step-by-step framework for safely converting equipment, appliances, or systems to natural gas in Australian workplaces. It helps businesses manage ignition, leak, and explosion risks while ensuring conversions are compliant with WHS obligations and relevant gas installation standards.

Natural gas conversions – whether for boilers, process heaters, commercial cooking equipment or building services – introduce significant fire, explosion and asphyxiation risks if not carried out under a robust, documented procedure. This Natural Gas Conversion Safe Operating Procedure sets out a structured, defensible method for planning, executing and verifying conversions so they are safe, compliant and traceable. It guides workers from initial asset identification and isolation through to commissioning, leak testing, and handover, ensuring that every stage is controlled and recorded.

Developed for Australian workplaces, this SOP aligns with WHS duties and typical gas installation requirements, helping duty holders demonstrate that conversions are performed by competent persons under a managed risk framework. It addresses the practical realities of working in live facilities – including coordination with building occupants, managing hot work and ignition sources, and integrating lock-out/tag-out with gas isolation. By implementing this SOP, businesses reduce the likelihood of gas leaks, unapproved modifications, and non-compliant installations that can lead to serious incidents, downtime, reputational damage, and regulatory enforcement.

Key Benefits

• Ensure natural gas conversions are completed safely, consistently and in line with Australian WHS requirements.
• Reduce the risk of gas leaks, fire, explosion and asphyxiation during and after conversion activities.
• Demonstrate due diligence to regulators, clients and insurers through clear documentation and sign‑off processes.
• Streamline coordination between gasfitters, maintenance teams, production, and building management to minimise operational disruption.
• Standardise training and competency expectations for personnel involved in natural gas conversion work.

Who is this for?

• Licensed Gasfitters
• Maintenance Technicians
• Facilities Managers
• Engineering Managers
• WHS Managers and Advisors
• Operations Managers
• Project Managers (Mechanical and Services)
• Site Supervisors and Leading Hands
• Property and Asset Managers
• Compliance and Risk Managers

Hazards Addressed

• Uncontrolled release of natural gas leading to fire or explosion
• Ignition of gas from hot work, electrical equipment or static discharge
• Asphyxiation due to gas accumulation in confined or poorly ventilated spaces
• Exposure to products of combustion during testing and commissioning
• Incorrect gas pressure or burner settings causing equipment damage or unsafe operation
• Failure of isolation leading to unexpected gas flow during work
• Manual handling injuries when moving or modifying gas appliances and pipework
• Slips, trips and falls around work areas, access platforms and plant rooms
• Electrical hazards when working on or near combined gas–electrical appliances
• Exposure to legacy materials (e.g. asbestos gaskets, lagging) during modification of older installations

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Standards and Legislative Requirements
• 3.0 Definitions and Abbreviations
• 4.0 Roles, Responsibilities and Competency Requirements
• 5.0 Pre‑Conversion Planning and Risk Assessment
• 6.0 Permit to Work, Isolation and Lock‑Out/Tag‑Out Requirements
• 7.0 Identification and Verification of Existing Equipment and Services
• 8.0 Tools, Equipment and Required Personal Protective Equipment (PPE)
• 9.0 Site Preparation, Ventilation and Ignition Source Control
• 10.0 Natural Gas Conversion Procedure – Step‑by‑Step
• 11.0 Leak Testing, Purging and Commissioning
• 12.0 Verification of Gas Pressures, Combustion and Appliance Performance
• 13.0 Documentation, Labelling and Compliance Certification
• 14.0 Integration with Emergency Procedures and Incident Response
• 15.0 Housekeeping, Demobilisation and Handover to Operations
• 16.0 Training, Induction and Competency Management
• 17.0 Monitoring, Review and Continuous Improvement of the Procedure

Legislation & References

• AS/NZS 5601.1: Gas installations – General installations
• AS/NZS 5601.2: Gas installations – LP Gas installations in caravans and boats for non-propulsive purposes (referenced where relevant to similar equipment types)
• AS 3814: Industrial and commercial gas-fired appliances
• AS 4575: Gas appliance servicing
• AS/NZS 60079 series: Explosive atmospheres (for hazardous area considerations where applicable)
• Safe Work Australia – Model Work Health and Safety Regulations
• Safe Work Australia – Code of Practice: Managing risks of hazardous chemicals in the workplace (for natural gas as a hazardous chemical)
• Safe Work Australia – Code of Practice: Managing the work environment and facilities
• Relevant state and territory Gas Safety Acts and Regulations (e.g. Gas Safety Regulation NSW, Gas Safety Act VIC)
• AS/NZS ISO 45001: Occupational health and safety management systems – Requirements with guidance for use