I have been doing a number of recent projects introducing the safety lifecycle to companies that are new to the field. As a result I have been playing with various ways to think about the overall safety lifecycle philosophy. As many of the more experienced readers are…
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Entries tagged with: Sis
- by Dr. Eric Scharpf, CFSE
- Thursday, April 26, 2012
- Functional Safety
The Safety Lifecycle as a Risk Control Loop
- by Hal Thomas, CFSE
- Tuesday, May 24, 2011
- Functional Safety
When is a Variable Frequency Drive a SIS?
It used to be that a pump would operate at a single speed dictated by a motor, thus fixing the pump curve. As the discharge flow decreased due to a restriction downstream, the pump outlet pressure would increase reaching its deadhead pressure. If the downstream piping and vessels were…