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High Reliability of Safety Instrumented Systems

S Bharadwaj Reddy
Instrumentation safety may be broadly divided into two categories: the safety hazards posed by malfunctioning instruments, and special instrument systems designed to reduce safety hazards of industrial processes. This section...

S84 / IEC 61511 Standard for Safety Instrumented Systems

S Bharadwaj Reddy
IEC 61511 is a technical standard which sets out practices in the engineering of systems that ensure the safety of an industrial process through the use of instrumentation. Such systems...

Difference between Availability, Reliability & SIL

S Bharadwaj Reddy
We often come across the above terms, and others, when we are talking about equipment and systems. All of them relate in some way to how well something will perform...

Safety Instrumented System Module Failure

S Bharadwaj Reddy
The international standard IEC/EN 61508 has been widely accepted as the basis for the specification, design and operation of safety instrumented systems (SIS). As the basic standard, IEC/EN 61508 uses...

Safety Instrumented System Interview Questions and Answers

S Bharadwaj Reddy
Read the following Safety Instrumented System Interview Questions and Answers useful for interview preparation. Safety Instrumented Systems must be independent from all other control systems that control the same equipment in...

Basics of Wellhead Control Panel (WHCP)

S Bharadwaj Reddy
WHCP: Wellhead Control Panel WHCPs are also known as Shutdown Panels (SDP), Emergency Shutdown Systems (ESD) or Hydraulic Safety Shutdown System (HSSS). These are failsafe shutdown systems which have pneumatic/hydraulic/electric components;...

Safety Instrumented System Engineer Interview Questions

S Bharadwaj Reddy
A SIS is engineered to perform “specific control functions” to failsafe or maintain safe operation of a process when unacceptable or dangerous conditions occur. Safety Instrumented Systems must be independent...

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