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White Paper: Statistical Verification of FMEDA Predicted Failure Rates
Statistical Verification of FMEDATM Predicted Failure Rates Using OREDA Gate Valve Field Failure Data In this paper the total failure rates predicted by Calibrated Failure Modes Effects and Diagnostic Analysis (Calibrated FMEDA) for a specific gate valve (Manufacturer X/Model Y) under specific conditions are statistically verified against the 70% confidence…
Recorded Webinars: Remote Actuated Valve Design – Adding Partial Valve Stroke Testing
Automatic diagnostics that detect potentially dangerous failures in automation equipment is not only well accepted but required in electronic devices. The same concept should apply to remote actuated valve assemblies as well. But some reject the concept of Partial Valve Stroke Testing (PVST) primarily because they perceive a false trip risk. Why is this? PVST can significantly improve safety and reduce operational expense. But operational cost is not reduced with an increased false trip rate. Does this happen with PVST? Some designs may increase the false trip rate but others will significantly reduce it. Why is that? What are the variables? This webinar describes the history of PVST and several different PVST designs. Safety and false trip rate analysis is done for each and compared. Which design is best?
News Item: Johnson Controls Receives IEC 62443-4-1 Certification from exida
Sellersville, PA: The global leader in functional safety, cybersecurity, and alarm management for automation systems, exida, has presented Johnson Controls with their IEC 62443-4-1 Cybersecurity Process Certification. exida was pleased to work alongside Johnson Controls, the global leader for smart and sustainable buildings, as they obtain this certification. A certification…
Rotex Automation Limited - Direct Acting Solenoids Type DA
IEC 61508 in the Safety Automation Equipment List
Rotex Automation Limited - RV3xx Series
IEC 61508 in the Safety Automation Equipment List
News Item: New White Paper: When and When Not to Use Failure Rates Based on Cycle Testing Data
One data source for predicting failure rates for final elements used in safety instrumented functions (SIF) is cycle testing. In cycle testing, the mechanical equipment’s moveable components are exercised rapidly through part or all of their range of motion. Any observed failures are recorded, and the mechanical equipment failure rate…
Bray International - Series S98 & S98H Actuators
IEC 61508 in the Safety Automation Equipment List
Recorded Webinars: How Can Templates Lead to Improved Cybersecurity Policies and Procedures?
Cybersecurity management is critical for maintaining a secure Industrial Control System over time. Having well documented procedures from risk assessment, through system design, and into the operations and maintenance phase is a key difference between a purely reactive cybersecurity posture and a mature approach that builds on continuous improvement. Using templates for these policies and procedures not only speeds up the development process, but also ensures alignment with the IEC 62443 standards and industry best practice.
Blog Entry: Share the Wealth (of Functional Safety Knowledge)
Experience is a good teacher. But how do you get the experience? Formal classroom or online training is often available for more general skills, but on-the-job training usually provides a more in-depth path to gain such experience. After doing a job for a while, working through difficulties with colleagues, and…
News Item: exida Introduces New IEC 62443 Cyber Templates for End Users
exida is excited to introduce a new set of IEC 62443 cyber templates intended for end users. Cybersecurity management is critical for maintaining a secure Industrial Control System over time. Having well documented procedures from risk assessment, through system design, and into the operations and maintenance phase is a key…
News Item: exida Launches Self-Paced IACS IEC 62443 Cybersecurity Lifecycle Course
Sellersville, PA: The global leader in industrial cybersecurity services for the process industries, exida, has launched the self-paced training course CS 102: Industrial Automation Control Systems (IACS) IEC 62443 Cybersecurity Lifecycle. CS 204 addresses integration of cybersecurity into the functional safety lifecycle per the IEC 62443 standards. While cybersecurity introduced…
White Paper: When and When Not to Use Failure Rates Based on Cycle Testing Data
When and When Not to Use Failure Rates Based on Cycle Testing Data in the Computation of Safety Metrics for SIF Elements One data source for predicting failure rates for final elements used in safety instrumented functions (SIF) is cycle testing. In cycle testing, the mechanical equipment’s moveable components are…
Recorded Webinars: How to Cause a False Trip with Your Final Element Design
In many industrial processes an automatic safety function is implemented using a remote actuated valve. The design objective is to trip the process when a dangerous condition is detected and to keep the process operating when no dangerous condition is detected. A lot of attention is paid to failures that impact the ability of a safety function to trip. But in many applications a “false trip” is not only costly but may create dangerous situations. Many heritage designs for the pneumatic/hydraulic controls increase the false trip rate. Justification is usually an improvement is safety. This webinar compares several pneumatic designs and shows trip rates and safety probabilities for each design. May the best design win.
News Item: Video - Functional Safety Certification for Software
exida's Ted Stewart and Dave Butler, CFSE joined Mark Hermeling of Grammatech to discuss frequently asked questions in the realm of functional safety certification for software. View the video here
Blog Entry: Safety Alarms and Why ISA-84.91.03 is Needed
On July 27, the US Chemical Safety Board (CSB) issued a Factual Update on their investigation into a release of water containing a toxic gas (hydrogen sulfide) and subsequent fatal injuries sustained at the Aghorn Operating Waterflood Station. While it is typically not a good idea to comment on investigations…
White Paper: Integrated Safety for a Single BMS
Evaluation Based on Siemens Simatic PCS7 System Any industry that has a requirement for a heated medium, whether it is used for process, utilities or emissions, utilizes equipment that has combustion controls and combustion safeguards. There has been an evolution in these controls from a traditional control that separates the…
Petroleum Technology Company, A.S. - VR Pressure Sensor / Transmitter
IEC 61508 in the Safety Automation Equipment List
News Item: exida Publishes Practical Guide to Functional Safety Management
Sellersville, PA: The global leader in functional safety, IACS cybersecurity, and alarm management for the process industries, exida, has announced the publication of Functional Safety for Managers, What Managers Need to Know. The book clearly presents and explains the importance of Functional Safety Management, as well as having well defined…
News Item: New White Paper: Application of Safety Instrumented Systems in Liquified Natural Gas (LNG) Processes
At first glance, one might assume that Liquified Natural Gas (LNG) processing is simply a compression and cooling process. Deeper observation reveals unique process challenges of flammable and explosible materials, high-pressure rotating equipment, and cryogenic conditions. LNG facilities are typically developed by connecting highly specialized process units designed and constructed…
White Paper: Application of Safety Instrumented Systems in Liquified Natural Gas (LNG) Processes
At first glance, one might assume that Liquified Natural Gas (LNG) processing is simply a compression and cooling process. Deeper observation reveals unique process challenges of flammable and explosible materials, high-pressure rotating equipment, and cryogenic conditions. LNG facilities are typically developed by connecting highly specialized process units designed and constructed…