Compressed Gas Cylinder Handling (Oxy/Acet etc.) SWMS
SWMS template for compressed gas cylinder handling. Covers Oxy-acet trolley, flashback arrestors, storage.. 8-state AU coverage, CIH-reviewed editable DOCX, available as an instant download.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Compressed gas cylinder handling — including oxygen, acetylene, LPG, argon and CO2 — is a routine task across construction, fabrication, maintenance and resource sectors, but it carries severe risk due to stored pressure energy, flammable/oxidising gas combinations, and cylinder mass. Acetylene in particular is unstable above 100 kPa and presents flashback, BLEVE and decomposition risks that have caused multiple Australian workplace fatalities. WHS Regulation 2025 r291 classifies work involving pressurised gases and hot work near flammables as High Risk Construction Work, mandating a documented SWMS prior to commencement. AS 4332 (storage), AS 4839 (oxy-fuel safe practice) and the Hazardous Chemicals Code of Practice impose specific duties for segregation, restraint, transport and flashback protection. This SWMS template provides a state-neutral, CIH-reviewed framework covering cylinder receipt, trolley transport, oxy-acet rig assembly, flashback arrestor verification, hot work integration and end-of-shift isolation, enabling PCBUs to discharge their consultation, training and record-keeping duties.
Hazards identified
7 hazards covered, sorted by priority.
Catastrophic cylinder rupture, blast overpressure injuries, fatal trauma, structural damage and prolonged WorkSafe investigation
Spontaneous ignition of oils, fabrics and hair causing severe full-thickness burns and inhalation injury
Crush injury to lower limbs, valve shear releasing high-pressure jet, projectile cylinder fatality
Acute lumbar disc injury, hernia, hand crush injuries and cumulative musculoskeletal disorder claims
Accumulation to lower explosive limit causing deflagration, flash fire burns and asphyxiation risk
Escalation of any incipient fire to uncontrolled blaze, regulator failure and multi-cylinder involvement
Full-thickness cryogenic tissue damage to hands and face, asphyxiation in confined spaces from displaced oxygen
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Elimination — eliminate cylinder transport by piping bulk gas from a perimeter manifold to fixed workstations where production volumes justify reticulation under AS 4839 Section 4.
- 2Elimination — eliminate oxy-fuel cutting where plasma, mechanical sawing or abrasive cutting can achieve the same outcome, removing flashback and oxygen-enrichment hazards entirely.
- 3Substitution — substitute acetylene with propylene or MAPP gas for lower-temperature cutting tasks, reducing decomposition risk and permitting higher working pressures per AS 4839.
- 4Engineering — fit dual flashback arrestors (regulator and torch ends) compliant with AS 4603, test annually, and tag with date; verify non-return valves on every shift change.
- 5Engineering — use purpose-built oxy-acet trolley with integral chain restraint, valve protection cap engagement and pneumatic tyres rated for site terrain.
- 6Engineering — store cylinders upright in caged compound with oxygen and fuel gases separated by 3 m or a 1.6 m non-combustible barrier per AS 4332 clause 4.
- 7Administrative — issue Hot Work Permit prior to ignition, conduct 30-minute fire watch post-work, and maintain cylinder register including hydrostatic test dates.
- 8Administrative — deliver toolbox training on leak-testing with soapy water, regulator purging sequence, and emergency shutdown including upstream cylinder valve isolation.
- 9PPE — issue flame-resistant cotton or leather welding jacket, AS/NZS 1338.1 shade 5 cutting goggles, AS/NZS 2161 chrome leather gauntlets and AS/NZS 2210.3 steel-cap boots.
- 10PPE — provide AS/NZS 1715 compliant respiratory protection where fume or oxygen depletion risk exists, with personal multi-gas monitor for confined or semi-enclosed work.
Applicable Codes of Practice
Mandates segregation distances, ventilation, restraint and signage for cylinder storage compounds — directly governs site laydown design and audit.
Specifies flashback arrestor placement, hose colour coding, leak testing and purging sequences for every oxy-fuel rig assembled on site.
Imposes risk assessment, SDS access, placarding and emergency planning duties under WHS Reg 2025 Chapter 7 for all compressed gases held above manifest quantities.
Defines performance and testing requirements for the flashback arrestors that this SWMS mandates at both regulator and torch positions.
High-Risk Construction Work triggered
Assembly, charging and operation of oxy-fuel rigs constitutes work on pressurised gas systems above atmospheric, engaging Schedule 1 item 14 thresholds.
Acetylene and LPG cylinder use creates a foreseeable flammable atmosphere within the ignition envelope, directly invoking the Schedule 1 item 16 criterion.
Cylinder restraint during transport and storage prevents catastrophic topple — failure to restrain triggers manual handling and crush exposures under this category.
PCBUs must consult workers, document the SWMS before work starts, and retain records for two years post-incident; penalties are substantial and indexed annually under the prevailing WHS schedule.
Who this is for
- →Boilermakers and welders on structural fabrication projects
- →Plumbing and gasfitting contractors on commercial fitouts
- →Mobile plant fitters in mining and civil maintenance
- →Principal contractors managing hot work on Tier 2 builds
What you receive
- ✓Editable DOCX template — Microsoft Word compatible
- ✓State-specific WHS legislation schedule (NSW/VIC/QLD/SA/WA/TAS/NT/ACT)
- ✓Hazard register with risk ratings + hierarchy-of-control mapping
- ✓Worker sign-on register, pre-start checklist, and incident escalation flow
Worked example
On a regional water treatment plant upgrade, a mechanical foreman runs a pre-start brief with three boilermakers tasked with cutting and modifying carbon-steel pipework using an oxy-acetylene rig. The foreman opens this SWMS on a site tablet and walks the crew through Section 3 hazards, pausing on the flashback and oxygen-enrichment entries. A worker identifies that the proposed cutting location is within 4 m of a diesel day tank, which falls below the AS 4839 separation requirement. The SWMS control hierarchy is consulted: elimination is rejected (no alternative cutting method available), so the engineering control of relocating the work to an open pad with a fire blanket barrier is selected, and a Hot Work Permit is raised. Each worker confirms their flashback arrestors are within annual test date by checking the tag, leak-tests connections with soapy water per the SWMS procedure, and dons FR jacket, gauntlets and shade 5 goggles. All three sign the SWMS register on the tablet. Two hours into the task, wind direction changes and exhaust drifts toward the storage compound; the foreman pauses work, references the SWMS dynamic risk review trigger, repositions the rig, and annotates the change in the daily log. At shift end, cylinders are isolated at the cylinder valve, regulators purged, and the trolley returned to the segregated compound — each step verified against the SWMS shutdown checklist.
Related legislation
- WHS Act 2011 (model)
- WHS Regulation 2025
- Managing Risks of Hazardous Chemicals CoP; ADG Code