Phast software tutorial

A Brief Tutorial for Phast Software

1. A Brief Tutorial for
PhastSoftware
Case Study: Ethane Storage Tank
Prepared by Elham Khalati

2. A Brief Tutorial for PhastSoftware
Phastisthemostcomprehensiveprocesshazardanalysissoftwaresystemfor
processsafetymanagementinallstagesofdesignandoperation.

3. Phastprocesshazardanalysissoftwareexaminestheprogressofapotential
incidentfromtheinitialreleasetofar-fielddispersionanalysisincluding
modellingofpoolspreadingandevaporation,andflammableandtoxiceffects.It
istheworld'smostcomprehensiveprocesshazardanalysissoftwaresystem.In
thefollowingabriefprocedureformodelingcatastrophicruptureofethane
storage.
A Brief Tutorial for Phast Software

4. Choosing pressure vessel as the model.
A Brief Tutorial for PhastSoftware

5. In the material section, type of material, mass inventory, process conditions and
releasing phase are defined. Bellow table shows the mentioned information for
the case study.
Material Ethane
mass inventory (kg) 1000
Temperature (°C) 25
Pressure (barg) 20
releasing phase Vapour
A Brief Tutorial for PhastSoftware

6. A Brief Tutorial for PhastSoftware
Material Section

7. After Inserting the required information in the material section, type of scenario
is defined in the Scenario tab. In this case study according to sudden discharge
of ethane, catastrophic rupture is selected as the main scenario.
A Brief Tutorial for PhastSoftware

8. Weather conditions have noticeable effect on the modelling results, all the
dominant weather conditions are inserted in the weather section. Wind speed and
Pasquillstability are the required information.
A Brief Tutorial for PhastSoftware

9. If it is required to change fire, explosion and dispersion modelling parameters,
they are available in the parameter tab.
A Brief Tutorial for PhastSoftware

10. In order to see the selected materials or create a new material, material tab can
be used.
A Brief Tutorial for PhastSoftware

11. inserting a map, defining map dimensions and matching final diagrams with the
related map are available in the map tab.
A Brief Tutorial for PhastSoftware

12. After completing the required information, in order to model the scenario, Run
button shall be clicked. After running the model, by clicking on the graph button
in the toolbar all the graph results can be seen. After clicking on the graph
button, intended weather conditions shall be selected in order to see the results.
A Brief Tutorial for PhastSoftware

13. Catastrophic Rupture Results-Dispersion (Concentration vsTime graph in an
specified location)
A Brief Tutorial for PhastSoftware

14. Catastrophic Rupture Results-Explosion (Early explosion over pressure vs
Distance graph)
A Brief Tutorial for PhastSoftware

15. Catastrophic Rupture Results-Flash Fire (Flash Fire Envelope)
A Brief Tutorial for PhastSoftware