Product Overview

Summary: This SOP sets out safe, consistent brazing and soldering techniques specifically for HVAC installations, maintenance and repairs in Australian workplaces. It helps technicians control fire, fume and burn risks while delivering high‑quality, leak‑free joints that meet WHS and industry expectations.

Brazing and soldering are core skills in HVAC and refrigeration work, but they also introduce significant fire, fume and burn hazards if not tightly controlled. This Safe Operating Procedure provides a clear, step‑by‑step framework for preparing, brazing and soldering copper and related HVAC piping systems, including pre‑job planning, isolation of services, equipment set‑up, and safe shutdown. It is written for Australian conditions and work practices, with a strong focus on hot work permits, ventilation, working in ceiling spaces and plant rooms, and managing the interaction between open flames, refrigerants and building materials.

By implementing this SOP, businesses can standardise how technicians perform brazing and soldering on air conditioning, chilled water, refrigeration and mechanical services pipework. It supports compliance with WHS legislation, relevant Australian Standards and common client requirements on construction and maintenance sites. The procedure helps reduce rework and call‑backs due to poor joints or contamination, while also lowering the risk of fires, flashbacks, eye injuries and exposure to hazardous fumes. It is an essential document for HVAC contractors, facilities teams and service providers wanting to demonstrate due diligence, improve safety culture and maintain high workmanship standards across dispersed field teams.

Key Benefits

• Ensure consistent, high‑quality brazed and soldered joints that reduce leaks, rework and system downtime.
• Reduce the risk of fire, explosion and burns associated with hot work on HVAC and refrigeration systems.
• Demonstrate compliance with Australian WHS legislation, hot work requirements and relevant Australian Standards.
• Standardise training and competency expectations for HVAC technicians, apprentices and subcontractors.
• Improve planning and supervision of hot work in ceiling spaces, plant rooms and confined or poorly ventilated areas.

Who is this for?

• HVAC Technicians
• Refrigeration Mechanics
• Mechanical Services Plumbers
• Maintenance Fitters (HVAC/R)
• Site Supervisors
• WHS Advisors and Safety Officers
• Construction Project Managers
• Facilities and Asset Managers
• Apprentice HVAC and Refrigeration Workers

Hazards Addressed

• Fire and ignition of building materials from open flames and hot work
• Explosion risks from heating sealed or contaminated pipework containing residual refrigerant or pressure
• Thermal burns from contact with flames, hot metal, filler materials and flux
• Eye injuries from sparks, hot metal spatter and intense flame or arc glare
• Inhalation of metal fumes, flux fumes and combustion products in poorly ventilated spaces
• Oxy‑fuel equipment failures, flashbacks and gas leaks
• Manual handling strains from awkward postures and handling gas cylinders or heavy tools
• Electric shock risks when using electrically powered soldering or heating equipment near conductive services
• Slips, trips and falls due to hoses, leads and tools in access ways and ceiling spaces

Included Sections

• 1.0 Purpose and Scope
• 2.0 Definitions and Terminology (Brazing, Silver Soldering, Soft Soldering, HVAC Applications)
• 3.0 Roles, Responsibilities and Competency Requirements
• 4.0 Applicable Legislation, Standards and Codes of Practice
• 5.0 Required Tools, Equipment and Materials (Torches, Filler Metals, Fluxes, PPE)
• 6.0 Personal Protective Equipment (PPE) Requirements
• 7.0 Pre‑Job Planning and Risk Assessment (including Hot Work Permits and JSA/SWMS)
• 8.0 Site Preparation and Isolation of Services (Refrigerants, Gas, Electrical, Water)
• 9.0 Ventilation and Atmospheric Monitoring Requirements
• 10.0 Brazing Procedure for HVAC Pipework (Step‑by‑Step)
• 11.0 Soldering Procedure for HVAC and Refrigeration Components (Step‑by‑Step)
• 12.0 Working in Ceiling Spaces, Roof Cavities and Confined or Restricted Areas
• 13.0 Control of Fire and Explosion Risks (Fire Watch, Fire Extinguishers, Housekeeping)
• 14.0 Handling and Storage of Gas Cylinders and Fuel Gases
• 15.0 Quality Control, Inspection and Testing of Joints (Visual, Pressure, Leak Testing)
• 16.0 Environmental and Waste Management (Flux, Metals, Offcuts, Fumes)
• 17.0 Emergency Procedures (Burns, Fire, Fume Exposure, Equipment Failure)
• 18.0 Training, Competency, Authorisation and Refresher Requirements
• 19.0 Documentation, Records and Review of the SOP

Legislation & References

• Work Health and Safety Act 2011 (Cth) and corresponding state and territory WHS legislation
• Work Health and Safety Regulations 2011 (Cth) and corresponding state and territory WHS regulations
• Safe Work Australia – Code of Practice: Managing the Risk of Falls at Workplaces
• Safe Work Australia – Code of Practice: Managing Risks of Hazardous Chemicals in the Workplace
• AS/NZS 5601.1: Gas installations – General installations (for hot work around gas services)
• AS 4839: The safe use of portable and mobile oxy-fuel gas systems for welding, cutting, heating and allied processes
• AS 1674.1: Safety in welding and allied processes – Fire precautions
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 1337.1: Personal eye protection
• AS/NZS 1891.4: Industrial fall-arrest systems and devices – Selection, use and maintenance