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General Method for Uncertainty Evaluation of Safety Integrity Level (SIL) Calculations
(Mary Kay O'Connor Process Safety Center, 2016)
The IEC 61511 standard requires a verification calculation that a proposed design for a safety instrumented function (SIF) achieves the desired safety integrity level (SIL). The evaluation of the safety integrity level of ...
Pros & Cons of Electronic Marshalling for a Safety System
(Mary Kay O'Connor Process Safety Center, 2016)
Electronic Marshalling represents a new technology for connecting hard wired inputs and outputs to a control system. In lieu of using a twisted pair of shielded wires There are specific and obvious advantages to using ...
CCPS’s Vision 20/20: Improving YOUR vision so WE ALL can see better
(Mary Kay O'Connor Process Safety Center, 2016)
Vision 20/20, developed by the Center for Chemical Process Safety (CCPS), looks into the not- too-distant future to describe how great process safety is delivered when it is collectively and fervently supported by industry, ...
Thermal Decomposition Mechanisms of 1H-1,2,4-Triazole Derivatives : Theoretical Study
(Mary Kay O'Connor Process Safety Center, 2016)
Probabilistic Approach to Deriving Oil Spill Size
(Mary Kay O'Connor Process Safety Center, 2016)
Not all pipelines are created equal. Pipelines have different characteristics, and would therefore show different levels of integrity and fail differently. The failure mode and cause of a given pipeline depends on several factors including the design, operating and environmental parameters. A new tool was developed to evaluate pipeline integrity and assess its potential failure mode, patterns, and rate based on the critical pipeline parameters. These parameters include the pipeline material of construction, wall thickness, operating pressure, service material, backfill medium/material, age, coating, pipeline size and other relevant parameters. The new tool was developed using pipeline data collected from the European Union, UK, and USA for pipeline failures over four decades. Failure models and patterns were analyzed, and over 60,000 failure modes/pattern combination were identified. The tool predicts the failure mode and patterns in terms of failure rate distribution by size of leak and its causes. It also shows the relative Pipeline Risk Index, defined as the pipeline’s potential failure rate relative to average pipeline population in the industry within similar pipeline categories. Ignition probabilities for pipeline failures were also analyzed and are predicted by this tool for each pipeline leak depending on the leak characteristics.
(Mary Kay O'Connor Process Safety Center, 2016)
Not all pipelines are created equal. Pipelines have different characteristics, and would therefore show different levels of integrity and fail differently. The failure mode and cause of a given pipeline depends on several ...
Analysis of enhanced flame speed in the transition droplet sizes for n-alkane aerosols generated by electrospray
(Mary Kay O'Connor Process Safety Center, 2016)
Fire and explosion incidents related to aerosol occur occasionally throughout the industries. However, its hazards are relatively overlooked due to the misconception of that liquids are safe below their flash point. As ...
Results Matter: Three Case Studies Comparing and Contrasting PFFM and HazOp PHA Reviews
(Mary Kay O'Connor Process Safety Center, 2016)
Complete, thorough, and correct process safety management depends to a large extent on complete, thorough, and correct process hazard identification, both before and during the process hazards analysis (PHA) review. Findings ...
Control Room Design: Best Practices and Lessons Learned From a Multi-Disciplinary Perspective
(Mary Kay O'Connor Process Safety Center, 2016)
Challenges in applying Process Safety Management at a University Laboratories
(Mary Kay O'Connor Process Safety Center, 2016)
Risks associated with academic research are often perceived as being much lower than risks within large-scale process industry operations. While the inventories of hazardous materials are generally lower within an academic ...