May 2024 Webinar SIF Definition during the SIS Lifecycle
SIF Definitions during the SIS Lifecycle
Defining safety instrumented functions is a critical task that happens very early in the SIS safety lifecycle. Mistakes during this phase can cascade into errors persisting throughout the entire SIS safety lifecycle. Some common errors include associating every action for a sensor in a cause-and-effect diagram, ignoring multiple sensors that can detect a hazardous condition, and improperly voting a large number of sensors – many of which cannot detect a hazard simultaneously.
This webinar presents a series of rules that will allow SIS designers to properly define safety functions prior to SIL selection and SIL verification steps.
00:00 - Introduction
03:04 - Criteria for Selecting LOPA Scenarios
08:41 - Safety Instrumented Function – Technical
13:00 - Safety Instrumented System
14:44 - Safety Integrity Level Selection
15:47 - What is a Safety Integrity Level?
16:32 - What is risk?
17:44 - Effect of Safety Instrumented Systems
20:41 - Safety Instrumented Functions
42.48 - Guideline #1
44:32 - Example #1 High Pressure Pump
52:06 - Guideline #2
53:32 - Example #2 Fired Heater
01:03:11 - Guideline #3
01:04:22 - Example #3 Batch Chemical Reactor
01:09:57 - Guideline #4
01:10:47 - Example #4
01:16:35 - Guideline #5
01:17:32 - Example #5
01:23:14 - Questions
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