Type B Gas Appliance & Train Install (AS 3814) SWMS
A Safe Work Method Statement for type b gas appliance & train install covering all key hazards, controls and regulatory requirements. This is classified as high-risk construction work under WHS Regulation 2025.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Type B gas appliance installation covers the installation of Type B gas appliances and installations — the larger, more complex industrial and commercial gas appliances that are not certified Type A appliances, such as industrial process burners, large boilers, kilns, furnaces and bespoke combustion plant. Type B work is the most demanding category of gasfitting: the appliances are high-capacity, often custom-engineered, and an installation fault can cause a major gas leak, explosion, fire or carbon monoxide release. Type B appliances require certification by a competent person before they may be used. This document is written on the basis that Type B installation is carried out by a gasfitter authorised for Type B work, to the gas installation standard, with the installation certified before the appliance is commissioned and used.
Type B gas appliances are installed to AS/NZS 5601.2:2022 Gas installations Part 2: LP Gas installations in caravans and boats for non-propulsive purposes does not apply here; the governing standard is AS/NZS 5601.1:2022 Gas installations Part 1, which addresses Type B appliances and installations, together with the Type B certification requirements administered by the relevant gas technical regulator. Type B appliances must be certified by an authorised person who assesses the design, installation and safety of the appliance before it may be used. The defining hazards are the high gas loads, the complex combustion and the major consequence of a fault. This document coordinates the gas-standard, Type-B-certification, leak-testing, combustion and ventilation controls so the appliance is installed, certified and left safe.
Hazards identified
9 hazards covered, sorted by priority.
Major fire, explosion or asphyxiation from a leak on a high-load installation
Carbon monoxide poisoning from incomplete combustion on the appliance
An unsafe high-capacity appliance placed in use without Type B certification
Combustion-product accumulation and carbon monoxide in the space
Major flash fire or explosion from an ignition source during the work
A high-capacity appliance operating without functioning safety systems
Severe burns from the hot industrial appliance and flue
Crush and musculoskeletal injury installing large, heavy plant
Electrical and plant hazards where the appliance integrates with other services
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Administrative: ensure the Type B appliance is designed, installed and certified to AS/NZS 5601.1:2022 and the Type B certification requirements, with the appliance certified by an authorised person before it is used.
- 2Engineering: install the consumer piping, regulation, isolation, ventilation and flueing for the high gas load to the standard, sized and configured for the appliance.
- 3Administrative: leak test and pressure test the installation before it is placed in service, confirming it is gas-tight, and carry out combustion testing on the commissioned appliance with a carbon monoxide check.
- 4Administrative: verify the complex controls and safety systems function, and do not place the appliance in service without functioning safety systems.
- 5Administrative: control all ignition sources during the work — no naked flames, no electrical switching, and control of static — and use a gas detector or approved leak-detection fluid rather than a flame for leak finding.
- 6Engineering: provide and confirm adequate ventilation and flueing for the high gas load so combustion products are safely discharged, and manage the hot-surface and flue hazard.
- 7Engineering: rig and place large appliances using rated lifting and engineered methods, and coordinate with other services and a licensed electrician where the appliance integrates with energised plant.
- 8Administrative: ensure the work is carried out and certified by an appropriately licensed gasfitter or plumber under the relevant state or territory gasfitting and plumbing licensing scheme, with a compliance certificate issued where required.
- 9Administrative: all workers must hold a valid White Card (General Construction Induction Training, CPCCWHS1001) before entering any construction workplace, with the gasfitting, plumbing and any confined space competencies and licences required for the work.
- 10Administrative: conduct a daily pre-start toolbox talk covering the day's work, identified hazards, isolations, required PPE and emergency procedures, and record attendance in the consultation section.
- 11Administrative: consult workers and any health and safety representatives on the work and its risks, record the consultation, and keep this document available at the workplace.
- 12PPE: eye protection to AS/NZS 1337.1, hearing protection where required, gloves appropriate to the task, and Class I or Class II safety footwear with protective toecap to AS/NZS 2210.3.
- 13Administrative: review and update this SWMS whenever the work scope changes, after any incident or near miss, when a worker or health and safety representative raises a concern, when new hazards are identified, or at minimum every 12 months.
Applicable Codes of Practice
The prevailing gas installation standard addressing Type B appliances and installations, leak testing, ventilation and commissioning.
The certification of Type B appliances by an authorised person before the appliance may be used.
Management of the gas and oxidising gases and the fire and oxygen-enrichment hazards.
Electrical safety and isolation for any electrical work, carried out by a licensed electrician.
The risk management process and hierarchy of controls applied to the hazards of the work.
High-Risk Construction Work triggered
Type B industrial gas appliances commonly integrate with energised electrical services and plant, bringing that part of the work within this high risk construction work category and requiring a SWMS where it applies.
This is licensed gasfitting or plumbing work that, in the circumstances described, is high risk construction work — on or near energised electrical installations or services — so a SWMS must be prepared before the work commences, kept readily accessible, reviewed as necessary, and given to the principal contractor if one is appointed. The work is carried out to AS/NZS 5601.1:2022 and, where applicable, the LP Gas, medical gas and pipeline standards, which are called up by the state and territory gas safety legislation, with the excavation, confined space, pressurised-gas-main or work-at-height controls applied as relevant. A failure in this work can cause a major gas release, fire, explosion or patient harm, and breaches of the gas legislation and the primary duty of care under the model WHS Act are actively enforced, with offence categories running from failure-to-comply through to reckless conduct, and the most serious breaches carrying imprisonment for individuals. Body-corporate maxima are substantial and indexed; the current maximum follows the prevailing schedule of the responsible regulator.
Who this is for
- →Gasfitters authorised for Type B gas appliance installation.
- →Industrial and commercial gas installers fitting Type B plant.
- →Mechanical services businesses installing boilers, burners and furnaces.
- →Industrial PCBUs commissioning Type B gas appliances.
- →PCBU safety managers and supervisors coordinating the Type-B-certification, combustion and ventilation controls.
What you receive
- ✓Editable Microsoft Word document (.docx) fully compatible with Microsoft Word 2016 and newer, Google Docs, and LibreOffice Writer.
- ✓Title page with editable fields for PCBU name, ABN, site address, project name, principal contractor details, and document revision date.
- ✓Hazard register with the type b gas appliance installation hazards — each with a documented consequence, inherent risk rating on a 5x5 likelihood-consequence matrix, hierarchy-of-control measures, and residual risk rating.
- ✓Type B installation prompts referencing AS/NZS 5601.1:2022 and the Type B certification requirements, a leak-test and combustion-testing record, a safety-system-verification section, and a ventilation and flueing section for the high gas load.
- ✓Licensing and compliance-certificate prompts for the relevant gasfitting and plumbing scheme, the Type B or medical gas certification where applicable, and a respiratory protection selection and fit-test record per AS/NZS 1715 where relevant.
- ✓Worker consultation record per the model WHS Act consultation duty and a worker sign-on register (blank, expandable).
- ✓Applicable legislation and Codes of Practice schedule pre-populated for the model WHS jurisdiction with a state-variance reference table covering the harmonised states, plus Victoria.
- ✓Emergency procedure template and a revision log.
Worked example
A gasfitter authorised for Type B work is engaged to install a large industrial gas-fired boiler. Because the boiler is a Type B appliance, it is designed, installed and certified to AS/NZS 5601.1:2022 and the Type B certification requirements, and certified by an authorised person before it is used. The consumer piping, regulation, isolation, ventilation and flueing are installed for the high gas load to the standard. The installation is leak tested and pressure tested to confirm it is gas-tight, and combustion testing is carried out on the commissioned appliance with a carbon monoxide check. The complex controls and safety systems are verified to function, with the appliance not placed in service without them. Ignition sources are controlled during purging and commissioning, and a gas detector is used for leak finding. Ventilation and flueing are confirmed adequate for the high gas load. The large boiler is rigged and placed using rated lifting, coordinated with a licensed electrician for the energised plant integration. The appliance is certified, the gasfitter issues the documentation and retains the records.
Related legislation
- Model Work Health and Safety Act — primary duty of care; the duty to consult workers; the reckless-conduct offence; and notifiable-incident provisions, as enacted in each jurisdiction.
- Model Work Health and Safety Regulations — Section 291 high risk construction work and the SWMS preparation and review duties, and the confined space, excavation and pressurised-gas provisions where applicable, as enacted in each jurisdiction.
- The gas installation standard AS/NZS 5601.1:2022, the LP Gas storage standard AS/NZS 1596, the medical gas standard AS 2896, and the relevant plumbing and drainage standards AS/NZS 3500, are called up by the state and territory gas and plumbing safety legislation, together with the Type B and medical gas certification requirements and the gas network operator's requirements where applicable.
- Gasfitting and plumbing work is licensed under each state and territory's gasfitting and plumbing licensing scheme, with Type B authorisation and medical gas certification required for that work, and compliance certification required for notifiable work.
- Victoria operates under the Occupational Health and Safety Act 2004 and the Occupational Health and Safety Regulations 2017, with the high risk construction work, confined space and excavation provisions applying in place of the model instruments.
Frequently asked questions
What is a Type B gas appliance?
A Type B gas appliance is a larger, more complex industrial or commercial gas appliance that is not a certified Type A appliance — such as an industrial burner, large boiler, kiln or furnace. Type B appliances are often custom-engineered and high-capacity, and they must be certified by an authorised person before they may be used, because of the major consequences of a fault.
Who can install a Type B appliance?
Type B gas appliance installation is carried out by a gasfitter authorised for Type B work, to AS/NZS 5601.1:2022 and the Type B certification requirements. Type B is the most demanding category of gasfitting, so it is reserved to authorised practitioners, and the appliance is certified by an authorised person before it is used.
What is Type B certification?
Type B certification is the assessment and certification of a Type B appliance by an authorised person, who assesses the design, installation and safety of the appliance before it may be used. Because Type B appliances are high-capacity and custom-engineered, the certification confirms the specific appliance is safe before it is placed in service.
Why is combustion testing important for Type B appliances?
Type B appliances have high gas loads and complex combustion, so combustion testing confirms the appliance is burning correctly and is not producing carbon monoxide, and the safety systems are verified to function. Given the high capacity and the major consequence of a fault, the combustion testing and safety-system verification are central to commissioning a Type B appliance.
Is the installation leak tested?
Yes. The installation is leak tested and pressure tested before the appliance is placed in service, confirming it is gas-tight, with ignition sources controlled and a gas detector used for leak finding. On a high-capacity Type B installation a leak can have major consequences, so the leak and pressure testing is an essential part of the work before the appliance is certified and used.