Starting New SIF Analyses
- 09 Aug 2024
- 3 Minutes to read
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Starting New SIF Analyses
- Updated on 09 Aug 2024
- 3 Minutes to read
- Contributors
- Print
- DarkLight
- PDF
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Often a SIF Analysis will be created from a LOPA and will then automatically be connected to that LOPA. Alternatively, a SIF Analysis can be created independent from a LOPA, e.g., when you have an emergency button. In this case, you can connect it to a LOPA afterwards. But take note, this must be done via the LOPA, it is not possible to connect a SIF to a LOPA from the SIF Details Page. Lastly it is also possible to create a SIF Analysis from the HAZOP.
When you create the SIF Analysis a pop-up field will open. For more information on the fields refer to the table below.
Field | Description |
|---|---|
Parent Plant Id | Click the search icon here to select the Parent Plant. Alternatively click the search icon in the Unit field to select the Parent Unit. You only need to select one of the two. |
Unit | Click the search icon to select the Parent Unit. All Units in the selected scope will be available to select. Alternatively click the search icon in the Parent Plant ID to select the Parent Plant. You only need to select one of the two. |
Hierarchy | This is populated automatically. E.g., Site, Plant, Unit |
Name | A unique name for the Analysis. |
Description | Enter a short description for the Analysis. |
Copy Team Composition | Check to copy the LOPA team to the SIF Analysis. This is only applicable when the SIF Analysis is started from a LOPA. |
Function Group | Select the applicable Function Group. Function groups are a means to organize SIFs into logical groups such as belonging to a compressor or a furnace. Note: From the pop-up you can also create a new Functional Group. |
SIF Analysis Type | Full, Sensor Only, or Element Only |
Process Safety Time | This is needed if the verification of function response time is required. The PST should be provided/calculated by the project process engineer and fed back to the SIF designer. |
PST Rationale | The PST rationale should be provided/calculated by the project process engineer and fed back to the SIF designer. |
PHA / HAZOP reference | Enter a reference to the Process Hazard Analysis or HAZOP that was conducted. In future this will automatically be linked when created from a LOPA. |
Success Criteria SE | Add notes with regards to the Success Criteria of the Sensor. This is intended to support the SIF design. |
Success Criteria FE | Add notes with regards to the Success Criteria of the Final Element. This is intended to support the SIF design. Note: There is no Success Criteria for Logic Solvers. When there is more than one LS then it will always be NooN. |
Design Intent | This is the hazardous situation that is to be protected against. Typical entries are “Prevent P3201 cavitation” or “Prevent run-away reaction”, “prevent overfilling T4312” etc. Do not enter consequences as a design intent. E.g., do not enter “Prevent P3201 damage” because there are many ways to damage the pump and this SIF only prevents one of them! |
Starting a SIF Analyses from a LOPA
To start a new SIF Analysis during a LOPA – see Adding SIF Analyses to LOPAs.
After you created the SIF Analysis you can continue to calculate the SIF’s Target PFD.
Starting SIF Analyses from the Main Screen
To start a new SIF Analysis independent from a LOPA:
- Go to the SIF Analysis Main Screen.
- Click + to create a new SIF Analysis.
Go to the SIF Analysis main screen and click +.
- Enter the required data in the pop-up window. See the table above.
- Click Save when done.
The new SIF Analysis will be created, and you will be redirected to the Detail Page of the SIF Analysis that was just created.
Starting SIF Analyses from a HAZOP
To start a new SIF Analysis from a HAZOP:
- In the HAZOP, define an Existing safeguard.
- For the Safeguards Type, select “Control Barrier”.
- For the Category select “SIF Analysis”.
- The SIF Analysis button will now become available.
- Click SIF Analysis and click +.
Click + to create a new SIF Analysis. - Enter the required data in the pop-up window. See above the table above.
- Click Save when done.
The new SIF Analysis will be created, and you will be redirected to the Detail Page of the SIF Analysis that was just created.
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