Product Overview

Summary: This Heat Treatment Safe Operating Procedure sets out a clear, safe and compliant method for conducting heat treatment activities in Australian workplaces. It helps control extreme temperature, fire and fume hazards while maintaining product quality, protecting workers and supporting your WHS obligations.

Heat treatment processes such as annealing, tempering, quenching and stress relieving are critical for achieving the required mechanical properties in metals and components, but they also introduce significant safety risks. Workers are routinely exposed to extreme temperatures, hot surfaces, flammable atmospheres, combustion products and heavy components being loaded and unloaded from furnaces. Without a robust and consistent procedure, the likelihood of burns, fires, explosions, equipment damage and non-compliant product rapidly increases, exposing the business to serious WHS, quality and reputational consequences.

This Heat Treatment Safe Operating Procedure provides a structured, step-by-step method for planning, setting up, operating and shutting down heat treatment equipment in line with Australian WHS expectations. It addresses hazard identification, control measures, required PPE, lock-out/tag-out, emergency response, and quality checkpoints such as soak times, temperature verification and quench control. By implementing this SOP, businesses can standardise operator behaviour, reduce incident rates, demonstrate due diligence to regulators and clients, and ensure that every batch processed meets both safety and specification requirements.

Key Benefits

• Ensure safe operation of furnaces, ovens and quenching systems through clear, repeatable steps.
• Reduce the risk of burns, fires, explosions and fume exposure for workers and contractors.
• Demonstrate due diligence and compliance with Australian WHS legislation and relevant standards.
• Improve consistency and quality of heat-treated components by standardising process controls.
• Streamline induction and refresher training for new and existing heat treatment operators.

Who is this for?

• Production Managers
• WHS Managers
• Metallurgists
• Heat Treatment Operators
• Maintenance Supervisors
• Workshop Managers
• Fabrication Supervisors
• Quality Assurance Managers
• Engineering Managers
• Apprentices and Trainees in Metal Trades

Hazards Addressed

• Contact with hot surfaces, molten salts, hot metals and radiant heat causing burns
• Fire and explosion risks from combustible materials, fuel gases and quench media
• Thermal stress and heat-related illness (heat stress, heat exhaustion)
• Exposure to combustion products, metal fumes and potentially toxic atmospheres
• Mechanical hazards from loading and unloading heavy components and fixtures
• Electrical hazards associated with electric furnaces, control panels and elements
• Slips, trips and falls around quench tanks, cooling areas and scale build-up
• Manual handling injuries when positioning workpieces and furnace furniture
• Eye injuries from radiant heat, scale, splashes of quench media and flying particles
• Confined or restricted space hazards around furnace pits and enclosed treatment areas

Included Sections

• 1.0 Purpose and Scope
• 2.0 Definitions and Process Types (Annealing, Tempering, Quenching, Normalising, Stress Relieving)
• 3.0 Applicable Legislation, Standards and References
• 4.0 Roles and Responsibilities (PCBU, Supervisors, Operators, Maintenance, Contractors)
• 5.0 Competency, Training and Authorisation Requirements
• 6.0 Plant and Equipment Description (Furnaces, Ovens, Quench Tanks, Controls, Handling Equipment)
• 7.0 Required Personal Protective Equipment (PPE) and Safety Devices
• 8.0 Pre-Start Checks and Area Preparation
• 9.0 Hazard Identification and Risk Controls for Heat Treatment Operations
• 10.0 Safe Operating Procedure – Loading and Unloading Workpieces
• 11.0 Safe Operating Procedure – Furnace/Oven Start-Up and Temperature Ramp-Up
• 12.0 Process Control – Soak Times, Temperature Verification and Recording
• 13.0 Quenching Operations – Media Selection, Agitation and Splash Control
• 14.0 Ventilation, Fume Extraction and Atmospheric Monitoring
• 15.0 Lock-Out/Tag-Out (LOTO) and Isolation for Cleaning, Maintenance and Breakdown
• 16.0 Management of Hazardous Chemicals (Quench Oils, Salts, Protective Atmospheres)
• 17.0 Emergency Procedures – Burns, Fires, Explosions, Spills and Power Failure
• 18.0 Housekeeping, Waste Management and Environmental Considerations
• 19.0 Inspection, Maintenance and Calibration Requirements
• 20.0 Quality Assurance, Batch Traceability and Record Keeping
• 21.0 Monitoring, Review and Continuous Improvement of the SOP

Legislation & References

• Work Health and Safety Act 2011 (Cth) and matching state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and matching state and territory WHS Regulations
• Safe Work Australia – Code of Practice: Managing the Risk of Plant in the Workplace
• Safe Work Australia – Code of Practice: Managing Risks of Hazardous Chemicals in the Workplace
• Safe Work Australia – Code of Practice: Managing the Work Environment and Facilities
• AS 1680: Interior and workplace lighting (for furnace and work areas)
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 1801: Occupational protective helmets
• AS/NZS 2161: Occupational protective gloves
• AS 4836: Safe working on or near low-voltage electrical installations and equipment
• AS/NZS 4024 (series): Safety of machinery
• Relevant manufacturer instructions and equipment-specific safety guidelines for furnaces and ovens