Purpose-built applications for consequence analysis
Perform consequence analyses faster with web-based applications powered by proven Phast™ calculation models.
Phast Online enables engineers and safety professionals to access consequence modelling tools through an intuitive web interface. Prior experience with Phast is not required, making consequence analysis accessible to a wider range of users while maintaining confidence in the underlying calculation methods.
Simple, intuitive, web-based platform for consequence modelling
Evaluate hazards through focused web applications
Available applications include:
Models the dispersion of off-gas (for unignited cases) and smoke (for ignited cases) generated during a battery thermal runaway. The application uses inputs such as battery chemistry and energy capacity to predict the discharge of unignited off-gas and ignited smoke, which is then used in downstream dispersion modelling using the Phast dispersion model (UDM).
Models a leak of hydrogen from a pressurized vessel, with inputs such as mass inventory, pressure, temperature, and hole size, release elevation, and release angle. The jet fire modelling uses the Miller jet fire model.
Models a leak from a pressurized vessel, with inputs such as material, mass inventory, pressure, temperature, hole size, release elevation, and release angle.
Models the state of material post-release and the specification of discharge data. It uses inputs such as material, mass flow rate, duration, velocity, temperature, liquid fraction, release elevation, and release angle.
Models the vapour release when the relief valve lifts. It considers pressure-drop from frictional losses, and the restricting orifice of the valve itself. It uses additional inputs such as pipe length, pipe internal diameter, and relief valve diameter.
Models a full-bore rupture in pipework attached to a vessel. It accounts for the pressure-drop from frictional losses. It uses additional inputs such as pipe length and pipe internal diameter.
Models the instantaneous release of material from its storage or process conditions in a vessel or pipe, through all the stages in its dispersion to a harmless concentration. The modelling includes discharge calculations to obtain the release energy and state, and dispersion, fire and explosion calculations to obtain representative effect zones.
Consequence results displayed on a map
Graphical output of consequence results
Ideal for rapid screening analyses
Phast Online helps professionals quickly evaluate potential hazards and make informed decisions throughout a project lifecycle, including:
PHA, LOPA and HAZOP facilitators
Emergency planners and response teams
Consultants and operators supporting energy transition projects
Facility and process engineers who need timely answers during project development
Consultants performing screening and what-if analyses
Operators looking to extend consequence modelling across their organization
Engineers assessing pressure relief scenarios and equipment siting requirements
Consequence modelling, wherever you are
Access and run consequence models from any location using a web browser and an internet connection. Phast Online delivers powerful consequence modelling capabilities without the complexity of desktop software installation and maintenance.
Collaborate easily by sharing workspaces with colleagues and stakeholders. Invited users can view shared results even without their own Phast Online subscription.
When TECHNOLOG Services needed to perform ammonia dispersion analyses for a specific ship design project, the company quickly found that the most efficient and cost-effective solution with immediate availability was DNV’s Phast Online.
Energys has proven its innovative hydrogen fuel cell power systems in the world’s harshest environments, including remote operations in Australia and Saudi Arabia. Energys relies on Phast Online for consequence analysis.
If we have similar requests for future projects, involving dispersion analyses for ammonia or methanol fuel in an early project phase, Phast Online is most certainly the tool we would use.
Robin Kloske
Naval Architect
TECHNOLOG
We wouldn't be able to certify our products without the software, so it is an integral part of our continuous product development. We are going to keep using it as we develop our future generation of products.
Simon Marin
Mechatronics and Mechanical Engineer
Energys
Phast Online pricing and licensing
Choose the application and licence duration - pricing starts from EUR 275 per month for single-user access, with costs varying by application.
Yes, Phast Online is built on the same consequence modelling technology used in desktop Phast. The underlying models for discharge, dispersion, fires, and explosions are the same, giving you confidence that you're working with proven and validated methods.
Phast Online is a web-based platform for consequence analysis applications, with a simplified user interface and fewer input parameters. Many advanced settings are handled automatically, making it easier to get results without configuring every modelling parameter.
In most cases, yes. Phast Online is designed to produce results that are consistent with equivalent Phast scenarios using default settings. Small differences may occur because some modelling options are automated, certain default parameters differ, and some advanced configuration options available in desktop Phast are not exposed to users in Phast Online.
Yes. Phast Online supports both single-component materials and mixtures. The software automatically selects the most appropriate modelling approach based on the material and storage conditions, helping users benefit from advanced mixture modelling without needing specialist knowledge of model settings.
Depending on the scenario, users can evaluate dispersion, flammable effects, explosion consequences, pool fires, jet fires, and fireballs.
