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High Pressure Gas Risk Assessment

High Pressure Gas Risk Assessment

  • • 100% Compliant with Australian WHS Acts & Regulations
  • • Fully Editable MS Word & PDF Formats Included
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  • • Customisable – Easily Add Your Logo & Site Details
  • • Includes 2 Years of Free Compliance Updates

High Pressure Gas Risk Assessment

Product Overview

Identify and control organisational risks associated with High Pressure Gas systems at a governance and management level, from design and procurement through to operations and emergency response. This High Pressure Gas Risk Assessment supports executive Due Diligence, strengthens WHS Risk Management systems, and helps demonstrate compliance with the WHS Act while reducing operational liability exposure.

Risk Categories & Hazards Covered

This document assesses risks and outlines management controls for:

  • Governance & WHS Duties: Assessment of officer due diligence, PCBU obligations, consultation arrangements, and alignment of high pressure gas operations with organisational WHS policy and risk appetite.
  • High Pressure Gas System Design & Engineering Controls: Management of design standards, pressure ratings, relief devices, segregation, ventilation, hazardous area classification, and inherently safer engineering solutions.
  • Procurement, Installation & Commissioning: Controls for supplier selection, specification of compliant plant, installation verification, pre-start checks, commissioning procedures, and change management for new or modified systems.
  • Gas Storage & Inventory Management: Assessment of bulk storage, cylinder handling, segregation of incompatible gases, inventory limits, leak potential, and location-specific controls (indoor, outdoor, confined or poorly ventilated areas).
  • Operations Management, Procedures & Work Authorisation: Development of documented operating procedures, isolation and lockout processes, permit-to-work systems, and controls for non-routine or high-risk activities.
  • Training, Competency & Supervision: Requirements for competency-based training, licensing where applicable, supervision levels, refresher training, and verification of operator understanding of high pressure gas hazards.
  • Inspection, Testing, Maintenance & Asset Integrity: Programs for periodic inspection, pressure testing, leak detection, preventive maintenance, defect reporting, and lifecycle management of vessels, piping, valves and regulators.
  • Monitoring, Instrumentation & Alarm Management: Controls for pressure, flow and gas detection instrumentation, alarm set-points, interlocks, trip systems, and management of alarm response and bypass conditions.
  • Contractor & Supplier Management: Selection, induction and oversight of contractors and service providers, verification of qualifications, and integration of external parties into site-specific gas safety requirements.
  • Emergency Preparedness & Response: Planning for leaks, ruptures, fires, explosions and loss-of-containment events, including emergency shut-down, evacuation, fire services interface and post-incident recovery.
  • Documentation, Information Management & Labelling: Management of gas registers, P&IDs, safety data sheets, operating manuals, pipeline and cylinder labelling, and version control for critical safety information.
  • Incident Reporting, Investigation & Continuous Improvement: Systems for reporting near misses and incidents, root cause analysis, corrective actions, and periodic review of high pressure gas risk controls.

Who is this for?

This Risk Assessment is designed for Business Owners, Senior Managers, Engineers and Safety Professionals responsible for the planning, operation and governance of high pressure gas systems across industrial, laboratory, processing and manufacturing environments.

Hazards & Risks Covered

Hazard Risk Description
1. Governance, WHS Duties and Legislative Compliance
  • • Failure to recognise high pressure gas as a hazardous plant and dangerous good under WHS Act 2011 and WHS Regulations
  • • Absence of a documented WHS management system specifically addressing high pressure gas risks
  • • Lack of formal PCBU due diligence processes for oversight of high pressure gas systems
  • • No clear allocation of WHS roles, responsibilities and accountabilities for high pressure gas ownership, operation and maintenance
  • • Inadequate consultation with workers and Health and Safety Representatives (HSRs) on changes to gas systems, equipment or procedures
  • • Incomplete or inaccurate safety documentation (e.g. Safety Data Sheets, compliance certificates, plant registration, design registrations where required)
  • • Failure to consider interface risks where multiple PCBUs share or interact with the gas system (contractors, tenants, suppliers)
  • • Poor change management for modifications to gas systems, set pressures, gas types or supply arrangements
2. High Pressure Gas System Design and Engineering Controls
  • • Inadequate pressure rating or incorrect selection of piping, valves, regulators and fittings relative to maximum allowable working pressure
  • • Absence or incorrect sizing of pressure relief devices leading to over‑pressurisation and catastrophic failure
  • • Poor layout and segregation of gas lines, regulators and manifolds increasing exposure to impact, fire, heat or incompatibility with nearby plant
  • • Use of inappropriate materials (e.g. incompatible metals, seals, lubricants) causing accelerated corrosion, embrittlement or leakage
  • • Insufficient ventilation and gas dispersion design resulting in accumulation of flammable, oxidising or asphyxiant gases
  • • Lack of automatic isolation and emergency shut‑off systems for major leaks, pipeline rupture or fire
  • • Inadequate separation distances from ignition sources, hot work areas or confined spaces
  • • Insufficient consideration of mechanical damage risks from vehicles, forklifts, dropped objects or vibration
  • • Poorly designed control and instrumentation (e.g. no redundancy, inaccessible gauges, lack of remote pressure indication and alarms)
  • • No formal design verification or failure mode and effects analysis (FMEA) for high pressure gas installations
3. Procurement, Installation and Commissioning of High Pressure Gas Plant
  • • Procurement of non‑compliant or unsuitable cylinders, regulators, hoses or components due to cost‑driven purchasing decisions
  • • Use of suppliers, installers or contractors who lack competency in high pressure gas systems
  • • Inadequate pre‑delivery verification of plant certifications, test reports and design compliance
  • • Improper installation practices including incorrect torqueing, support spacing, routing or regulator configuration
  • • Failure to conduct systematic pre‑commissioning checks and pressure testing prior to introducing gas
  • • Absence of commissioning protocols and sign‑off, including verification of interlocks, alarms and emergency shutdown systems
  • • Lack of integration between original equipment manufacturer (OEM) instructions and site‑specific WHS and engineering standards
  • • Poor management of temporary installations, mobile gas systems or hire equipment
  • • Failure to record as‑built conditions and changes during installation, resulting in inaccuracies in drawings and risk assessments
4. High Pressure Gas Storage and Inventory Management
  • • Excessive inventory of high pressure gas on site increasing the consequence of fire, explosion or mass leakage events
  • • Inadequate segregation of incompatible gases (e.g. flammable gases and oxidisers) and other dangerous goods
  • • Improper cylinder securing, storage orientation or racking leading to falls, mechanical damage or valve shear
  • • Lack of system to track cylinder ownership, testing dates and hydrostatic test currency
  • • Uncontrolled accumulation of empty or near‑empty cylinders and associated confusion during emergencies
  • • Inadequate controls for outdoor storage exposure to heat, vehicle impact or vandalism
  • • Poorly defined responsibilities between the organisation and gas supplier for storage area safety and inspection
5. Operations Management, Procedures and Work Authorisation
  • • Lack of formal operating procedures for use of high pressure gas systems and associated plant
  • • Reliance on informal knowledge and custom and practice rather than documented safe operating limits
  • • Unauthorised operation, adjustment of regulators or bypassing of safety devices by untrained personnel
  • • Inadequate management of work on or near pressurised systems, including absence of permit to work for intrusive tasks
  • • Poor communication and handover processes between shifts and work groups regarding system status and isolations
  • • Failure to control simultaneous operations (SIMOPS) where hot work, confined space entry or other high‑risk tasks occur near high pressure gas systems
6. Training, Competency and Supervision
  • • Inadequate training of workers, supervisors and contractors on high pressure gas hazards and safe systems of work
  • • Lack of formal competency assessment for personnel operating, maintaining or designing high pressure gas equipment
  • • Insufficient supervision, especially for new, young or inexperienced workers
  • • Limited awareness of the specific properties and health effects of different gases (flammable, toxic, oxidising, asphyxiant)
  • • Failure to provide refresher training or update training when plant or procedures change
  • • Over‑reliance on third‑party vendors for training without verifying content and competency outcomes
7. Inspection, Testing, Maintenance and Asset Integrity
  • • Degradation of cylinders, vessels, piping, hoses and regulators leading to leaks, ruptures or pressure loss
  • • Failure of pressure relief devices due to blockage, incorrect set points or lack of testing
  • • Corrosion, fatigue, vibration damage or mechanical impact not identified in time due to inadequate inspection regimes
  • • Inadequate management of defects and temporary repairs, including use of non‑approved components or clamps
  • • Missing or overdue statutory inspections, tests and recertifications for pressure equipment
  • • Poor maintenance documentation, leading to uncertainty about plant condition and history
8. Monitoring, Instrumentation and Alarm Management
  • • Failure to detect leaks, over‑pressure events or abnormal conditions due to lack of monitoring or defective instrumentation
  • • Alarm overload or nuisance alarms leading to operator desensitisation and missed critical warnings
  • • Uncalibrated or poorly maintained gas detectors and pressure sensors providing false or misleading information
  • • Inadequate visibility of system status for remote or after‑hours operations
  • • Insufficient analysis of alarm and trip events to identify underlying systemic issues
9. Contractor and Supplier Management
  • • Contractors performing installation, maintenance or inspection work on high pressure gas systems without appropriate competency or supervision
  • • Poor coordination between multiple PCBUs (host employer, principal contractor, gas supplier) leading to gaps in control of high pressure gas risks
  • • Insufficient communication of site‑specific hazards, procedures and emergency arrangements to visiting technicians and delivery drivers
  • • Inadequate verification of contractor adherence to WHS and technical standards for high pressure gas
  • • Contractual arrangements that focus on cost and time but do not adequately define safety performance requirements
10. Emergency Preparedness and Response
  • • Delayed or ineffective response to high pressure gas leaks, line ruptures, fires or explosions
  • • Lack of clear, practised emergency procedures specific to the types of gases present
  • • Inadequate emergency isolation points or poorly identified emergency shut‑off controls
  • • Insufficient coordination with emergency services and neighbouring businesses regarding high pressure gas risks
  • • Inadequate provision and maintenance of emergency equipment (e.g. breathing apparatus, fire suppression, spill control for cryogenic gases)
  • • Poor communication systems for alerting workers, contractors and visitors during a gas‑related emergency
11. Documentation, Information Management and Labelling
  • • Outdated or inaccessible documentation leading to incorrect assumptions about system design, operating limits or current plant status
  • • Inadequate labelling of gas lines, cylinders, manifolds and isolation points causing errors in operation, isolation or emergency response
  • • Loss of critical records such as inspection reports, design calculations and risk assessments
  • • Inconsistent or conflicting information between P&IDs, procedures and control system displays
12. Incident Reporting, Investigation and Continuous Improvement
  • • Under‑reporting of near misses, minor leaks and unsafe conditions related to high pressure gas
  • • Inadequate investigation of incidents leading to repeat events and unaddressed systemic causes
  • • Failure to share learnings from internal and industry high pressure gas incidents across the organisation
  • • Lack of performance indicators to monitor high pressure gas safety performance over time

Need to add specific hazards for your workplace?

Don't worry if a specific hazard isn't listed above. Once you purchase, simply log in to your Client Portal and add your own custom hazards at no extra cost. We take care of the hard work—creating the risk ratings and control measures for free—to ensure your document is compliant within minutes.

Legislation & References

This document was researched and developed to align with:

  • Work Health and Safety Act 2011
  • Work Health and Safety Regulations 2017
  • AS/NZS ISO 31000:2018: Risk management — Guidelines
  • AS 4645 (series): Gas distribution networks — Safety and integrity requirements for gas distribution systems (where applicable).
  • AS/NZS 1596: The storage and handling of LP Gas — Requirements for design, installation and operation of LP gas systems.
  • AS 4332: The storage and handling of gases in cylinders — Safety requirements for cylinder storage, segregation and handling.
  • AS 1210: Pressure vessels — Design and construction requirements for high pressure vessels and associated equipment.
  • AS/NZS 60079 (series): Explosive atmospheres — Standards relevant to hazardous area classification and equipment selection where flammable gases are present.
  • AS 3814: Industrial and commercial gas-fired appliances — Guidance for safe installation and operation of gas-fired plant where relevant.
  • AS/NZS 4801 / ISO 45001: Occupational health and safety management systems — Frameworks for integrating high pressure gas risks into organisational WHS management.
Standard Risk Assessment Features (Click to Expand)
  • Comprehensive hazard identification for all activities
  • Risk rating matrix with likelihood and consequence analysis
  • Existing control measures evaluation
  • Residual risk assessment after controls
  • Hierarchy of controls recommendations
  • Action priority rankings
  • Review and monitoring requirements
  • Consultation and communication records
  • Legal compliance references
  • Sign-off and approval sections

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