Displaying 1–25 of 58 results for William Mostia
Depending on the Equipment, Application, and Test Method, You May Be Able to Extend the Full Test Intervals for SIS Valves. This article is written by William L. (Bill) Mostia Jr., PE, of Exida, League City, Texas. Mostia has more than 25 years experience applying safety, instrumentation, and ...
Catastrophic Incidents Have Led to Useful Rules for Systems That Help Avoid Them
Here, There Be Dragons. It's a Scary New World in Process Control, but You Can Defend Your Plant Against Cyber Attack
It Comes Down to Reliability, and Simple Differences Add Up to Significant Limitations
Is It Possible to Have Safe Systems That Aren't Considered Reliable?
Through the looking glass of emerging technologies.
A holistic perspective of process safety requires more comprehensive hazard and risk assessment methods such as process hazards analysis, mechanical integrity, safety integrity systems and emerging technologies.
The Modbus protocol is the grandfather of modern fieldbuses. Modbus’s popularity is due to its simplicity, its openness and ubiquitous nature—it’s used everywhere. It has withstood the test of time and is still kicking after almost four decades. Modbus was originally published by Modicon in 1979,...
Understand the SIF to Control Confusion, Complexity and Cost of Safety Instrumented Systems
In 2004, ISA adopted the most recent safety standard, ANSI/ISA 84.00.01. And though its a good start, its clear that S84 is just the tip of the iceberg toward management of functional safety.
From Reactive and Preventive to Condition-Based Predictive. The 25-Year Transformation of Maintenance and Repair to Asset Management
A reader tells us what was missing from one of our latest articles.
Proof test coverage (PTC) of safety instrumented systems (SIS), also known as CPT, has recently become an important topic of discussion. In the past, it was commonly assumed in calculation and in practice that PTC was 100%. However, not all proof tests are comprehensive, and the approval agencies...
An effective conditioning monitoring and maintenance program mitigates process hazards while reducing downtime and increasing productivity.
Find and slay the dragons lurking in the typical safety instrumented system.
Expanding on the previous discussion of the reasons we ground and the specifications for ground resistance, this article explains why it’s necessary to connect instrumentation to the power ground system, and the theory and practice of shielding.
One of the key indicators of competency besides experience is training. This article discusses some of the training options available to develop skills in SIS engineering, and to help engineers become competent in this area to meet the requirements of IEC 61511.
Why and how to secure industrial control and safety systems at every conduit.
Engineer SIS beyond the standards to meet real-world requirements.
Understand the strength of your last line of cyber defense
Proof testing is an integral part of the maintenance of the safety integrity of our safety instrumented systems (SIS) and safety-related systems. Here's how to develop and implement safety instrumented function (SIF) proof tests.
It’s become apparent that, while the primary goals of our instrumentation and control systems is to keep process operations under reliable, safe and accurate control, the amount of information they have made available has reached an almost overwhelming level, and there is no end in sight. Let’s ...
Mistakes are inevitable, but understanding how and where they occur can minimize their frequency and impact.
If you dont deal with your computer-based control alarms in a disciplined manner, uncontrolled alarm growth can result, which can lead to out-of-control alarm systems. Find out what the top 10 reasons are to rationalizing your alarm management system.