There's a lot of confusion about Systematic Safety Integrity in new IEC61511. We are starting to see devices certified for SIS applications to have a rated Systematic Capability (SC) of 2. What does this mean? Is this yet another hurdle I need to jump over to meet a SIL target? Let's shine some light on Systematic [...]
During Layer of Protection Analysis (LOPA) of high hazard scenarios, we often rely on a diversity of protections including instrumented and non-instrumented safeguards. Invariably, we run into situations where instrumented safeguards must bear the full weight of risk reduction. Of course, we never want to design a Safety Instrumented Function to a SIL 4 or [...]
Have you ever wondered where the equations that are used to calculate probability of failure on demand for SIL verification came from? In this video, Kenexis CEO Ed Marszal goes the white board to show you. This video will demonstrate how all of the equations are based on the fundamental definitions of availability and reliability. [...]
In todays oil and chemicals market, time and budgets are strained to remain operational with a slight profit. Many facilities are making difficult operational and turnaround decisions to survive while possibly putting their operation at risk at the same time. There might be a significant way to reduce time and cost during operations and [...]
The process of safety integrity level (SIL) verification requires calculation of probability of failure on demand. As per convention and the information contained in the IEC 61511 standard (ISA 84.00.01), ISA technical reports on the topic and ISA training, the calculation is typically done using simplified equations. The terms of these equations are either based [...]
The China University of Petroleum and Kenexis has signed licensing agreements that will allow the university to utilize Kenexis software and Kenexis training materials in the gradudate and undergraduate curricula for the Department of Safety Science and Engineering of the College of Mechanical Engineering. In keeping with Kenexis' policy of giving back to the engineering [...]
We have developed the Effigy (Fire & Gas Detector Mapping) and Vertigo (SIS Lifecycle Management) software tools in Kenexis Instrumented Safeguard Suite to support language switching through your browser. While we still have work to do to translate the help files, the application is already translated into Chinese and Portuguese. This is done through the [...]
The IEC 61511 standard requires that the user specify extremes of environmental conditions as part of the safety requirements specifications package. This requirement is actually not a safety requirement but a general requirement for operation of all instrumentation and control devices, but its inclusion in the list of safety requirements specifications implies that the associated [...]
This article presents a quick introduction and overview to the Kenexis Vertigo software for SIS Design Basis Development. Vertigo is a module in the Kenexis Instrumented Safeguard Suite (KISS) of Application. KISS is a multi-user multi-site internet enabled enterprise software application, provided in the Software-as-a-Service (SaaS) format. During this getting started tutorial, Ed Marszal, the [...]
