PHAST Gas Dispersion & Explosion Analytical Services

PHAST Predicted Gas Dispersion Results Showing Gas Cloud Side View (Top) and Footprint (Bottom) for three (3) pre-determined concentrations.

PHAST Predicted Gas Dispersion Results Showing Gas Cloud Side View (Top) and Footprint (Bottom) for three (3) pre-determined concentrations.

HazRes can provide PHAST (Process Hazard Analysis Software Tool) analysis services in order to assist the client to assess situations that present potential hazards to life, property and the environment, and to quantify their severity.

PHAST has the ability to simulate the progress of a potential incident from the initial release to far-field dispersion including modelling of pool spreading and evaporation, and flammable and toxic effects including explosions and fires.

Coupled with the vast international experience of process safety and risk management including DSEAR Hazardous Area Classification studies, HazRes offers an industrially accepted solution for minimising and managing risk. The benefits of a full PHAST analysis conduced by qualified & experienced process safety engineers & consultants include:

  • Cost reduction in terms of losses and insurance.
  • Optimisation of plant and process.
  • Compliance with safety regulations.
  • Faster response to hazardous incidents.
  • Improved understanding of potential hazards.
  • Hazardous Area Classification Extent Calculations.

Using PHAST, HazRes can provide clients with quick and accurate screening results and be able to undertake sensitivity / parametric studies to evaluate the need for mitigating measures such as changes in design, operation or response.

PHAST software has often been used to model design options for proposed new facilities and for operational changes in existing ones. PHAST is designed to comply with the regulatory requirements of many countries. For example, specific modules have been included to ensure compliance with the Dutch Yellow Book, US EPA and UK HSE regulations.

PHAST contains models tailored for hazard analysis of offshore and onshore industrial installations. These include:

  • Discharge and dispersion models, including DNV’s proprietary Unified Dispersion Model (UDM).
  • Flammable models, including resulting radiation effects, for jet fires, pool fires and BLEVEs.
  • Explosion models, to calculate overpressure and impulse effects. Available models include the Baker Strehlow, TNO Multi-Energy and TNT explosion models.
  • Models for the toxic hazards of a release including indoor dose calculations.

Please note that HazRes can also provide more rigorous Computational Fluid Dynamics (CFD) gas dispersion simulation services for flammable, toxic and environmental impact assessment studies. HazRes’ CFD code incorporates the effects of terrain, buildings and plant structures, and models their affects on gas dispersion accurately using either steady-state or transient time-dependent analysis. Please contact HazRes for more details on HazRes’ CFD gas dispersion code and its capabilities.

Get in touch!

General Telephone No.:
+44 (0) 845 838 2026

Sheffield Office Telephone No.:
+44 (0) 114 399 7085

Aberystwyth Office Telephone No.:
+44 (0) 1970 625 815