Basic Terms used in SIL Verification
This article elaborates basic definition and use of HFT, SFF, and PFDavg terms which are widely used during the SIL verification process....
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Category: Safety Instrumented System (SIS)
A Safety Instrumented System (SIS) is engineered to perform “specific control functions” to failsafe or maintain safe operation of a process when unacceptable or dangerous conditions occur.
Transmitter Proof Testing
The purpose of proof testing is to detect the failures within the transmitter that are not detected by the regular diagnostics....
Intrinsic Safe Calculation
The intrinsic safe calculation is an activity done by Instrumentation Engineers in EPC or EPCM Industries. In this article, we shall see why is it done and How to do...
Understanding High Integrity Pressure Protection Systems (HIPPS)
No chemical process facility is immune to the risk of over-pressure to avoid dictating the necessity for over-pressure protection. For every situation that demands safe containment of process gas, it...
Purpose of Emergency Shutdown (ESD) System
Emergency Shutdown (ESD) System are specialized highly reliable control systems for high risk industries like Oil and Gas, Nuclear Power or other Environments with explosion risk (Ex.). Their purpose is...
Difference between Process shutdown and Emergency Shutdown
What is Process shutdown (PSD) ? Process shutdown (PSD) is defined as the automatic isolation and the activation of all part of a process. During a PSD the process remain...
Voting Logic in Safety Instrumented System (SIS)
There are 1oo1, 1oo2, 2oo2, 2oo3 etc voting logic in the safety instrumented system architecture. The voting logic architecture usually used in the field instrument and or final control elements to reach certain Safety Integrity...
Difference between SIS, PLC and BPCS Systems
Safety Integrity Level (SIL) is a measure of safety system performance – not a measure of process risk. The higher the level of risk, the greater the system performance required....
Why choose Intrinsic Safety ?
Intrinsic  safety (IS) is a low-energy  signalling  technique  that prevents explosions from occurring by ensuring that the energy transferred to a hazardous area is well below the energy required to initiate...
Energize to Safe Loop philosophy
Safety Instrument loop in a plant operate in two modes: Energized to safe De-energized to safe Energized to safe mode works as contrary to that of De-energized to safe loop....