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Contextualisation

Hazid Integrity creates a process model of the P&ID.

This can include:

  • The physical state of equipment
  • Does a vessel include a steam jacket
  • The process state of equipment
  • Running and standby equipment
  • The process configuration of the equipment
  • Cold side of a heat exchanger
  • The configuration of inline equipment
  • Isolation
  • Bypass
  • Drain valves

This information is often not represented on the P&ID and as such the engineer must normally determine these states manually.

Hazid Integrity uses this plant contextualisation to determine the deviation behaviour from normal intent during a safety analysis, and also to allow specific configuration or engineering rules to be run on the P&IDs. Hazid Integrity allows the engineers to impart their context specific knowledge to the system which can automatically set the contextualisation states using the Model Configuration Rules

Contextualised equipment states are stored at the Configuration level, to browse to the equipment item you wish to change the state of see Navigating the Contextualisation Trees

The contextualisation form opens at the level in the Project tree where you invoke it from. You can then browse to any level in the Project tree bellow the entry level to find the equipment item you wish to set a state upon.

The first tree within the Contextualisation form is a mimic of the Project tree from that entry level

You must browse the tree to your desired Configuration level to open the Model Tree

The Model Tree displays all of the Hazid Knowledge Models available within the selected Configuration.

From here you can select to assign Global state on equipment from the root of the tree or you may browse the tree to the selected equipment type you wish to assign the state on. All equipment are consolidated to the highest level in the tree selected.

To Assign states see Adding States to Equipment (this is a model library function)