Media Room

Media Room2020-05-22T14:09:06-06:00
2710, 2020

Webinar Series: New PHMSA Guidelines for Risk Assessment of Underground Gas Storage Wells Subject to Well Entry

October 27, 2020|

New PHMSA Guidelines The US Department of Transportation, Pipeline and Hazardous Materials Safety Administration (PHMSA) has released a set of guidelines for conducting risk assessments of underground gas storage wells that are subject to periodic well entry. The guidelines, developed by C-FER Technologies, are publicly available on the PHMSA website. Webinar Series C-FER is hosting a two-part webinar series outlining the quantitative risk assessment (QRA) process that form the basis for the guidelines. Part one will cover the two key process elements: risk estimation and risk evaluation. The discussion will include a [...]

2809, 2020

How to Establish a Detection Threshold for Acoustic-based External Leak Detection

September 28, 2020|

A number of fibre optic cable-based systems that employ distributed acoustic sensing (DAS) were analyzed to characterize their leak detection sensitivity. The sensitivity analysis involved (1) identifying a suitable release parameter capable of providing a defensible basis for defining detection sensitivity and (2) the application of regression analysis to characterize detection sensitivity as a function of the chosen release parameter. The paper—Establishing a Detection Threshold for Acoustic-based External Leak Detection Systems—describes the analysis approach developed to quantitatively determine leak detection sensitivity for various DAS technologies and deployment positions during two full-scale tests. The release [...]

2509, 2020

Using a Bayesian Approach for Crack Depth Measurements

September 25, 2020|

A Bayesian approach has been applied to inline inspection (ILI) and non-destructive examination (NDE) field measurement data to increase confidence in estimated feature depths. Multiple crack depth measurements were used to improve the characterization of ILI sizing error bias and to update the maximum depth distribution of individual crack features. The paper—A Bayesian Approach for Effective Use of Multiple Measurements of Crack Depths—describes the application of Bayesian methodology to three datasets, two of which collected over a series of Pipeline Research Council International (PRCI) projects. The results show that Bayesian updating, when compared to [...]

2509, 2020

Using a Limit States Design Approach for Assessing Corrosion and Cracks

September 25, 2020|

C-FER has developed a limit states design (LSD) approach to assess corrosion and crack features in onshore transmission pipelines. The LSD approach is a simplified form of the reliability-based approach that reduces the latter to a set of deterministic checks. It achieves the same benefits on an approximate basis and is easy to apply. The paper—Demonstration of a Limit States Design Method for Assessment of Corrosion and Crack Features—describes the application of the LSD approach to two low vapour pressure liquid pipelines (one with corrosion and one with crack features) and provides a comparison [...]

2409, 2020

Evaluating On-water Leak Detection Technology

September 24, 2020|

A comprehensive research project through the Pipeline Research Council International (under contracts PR-244-173902 and PR-244-193900) was completed to assess the abilities of various on-water external leak detection technologies to identify the presence of liquid hydrocarbon products on the surface of water in a controlled laboratory environment. The first phase of the project evaluated the performance of six technologies using eight test fluids in an idealized freshwater environment under ambient conditions. The second phase investigated the effect of freezing conditions on the performance of these technologies. The paper—On-water Liquid Leak Detection Technology Evaluation—describes the test [...]

2409, 2020

How to Assess Spill Volumes from Hazardous Liquid Pipelines

September 24, 2020|

Using publicly available data from PHMSA, an analysis of product release events associated with the onshore US hazardous liquid pipeline network was conducted to understand what historical data indicates in terms of actual release volumes and how they are affected by key pipeline attributes. As a result of this analysis, a simple model to determine release volume averages and their range based on the pipe diameter and mode of failure was developed. The paper— Analysis of Hazardous Liquid Pipeline Spill Volumes —describes the analysis of selected data in regards to: Release volume, Pipe diameter, [...]

2309, 2020

Standard Reliability-based Approach vs Bayesian Network Approach for Integrity Management

September 23, 2020|

A feasibility study was conducted to identify an approach to estimate the probability of leak due to internal stress corrosion cracking (iSCC) that uses previous investigations and handles data gaps. A standard reliability-based approach and a Bayesian Network approach were compared based on: Effective use of data; Flexibility of framework; and Ability to improve outcomes based on additional information. The paper— Comparison of Feasibility of a Standard Reliability-based Approach and A Bayesian Network Approach for Integrity Management of a Northern Canadian Liquids Pipeline —describes the: Standard reliability-based approach; Bayesian Network approach; Criteria for the [...]

2209, 2020

What’s new for pipeline risk acceptance criteria?

September 22, 2020|

Risk acceptance criteria have been developed for possible inclusion in the Canadian Standards Association’s Z662 Standard. These criteria, which will be included in Annex B on Guidelines for Risk Assessment of Pipeline Systems, will facilitate application of quantitative risk assessment by providing a consistent approach to evaluate the results. The paper—Safety Risk Acceptance Criteria—describes the criteria that have been developed and provides the background information needed for users to understand and use them correctly. The discussion includes a summary of the following: Measures used to quantify the safety risk associated with an ignited product [...]

2209, 2020

PIRAMID Version 4.5.11 Now Available

September 22, 2020|

We are pleased to announce that PIRAMID™ version 4.5.11 is now available for download. This new version introduces a number of performance enhancements and bug fixes including: The default inspection tool classes have been migrated to the new calculation engine. Inspection tool classes can now be edited within the configuration settings for reliability-based modules. The calculation section estimate has been improved when specifying optional attributes. Improvements to the stability of the plain dent model calculations have been made. A fix to prevent crashing when interactive consequence calculation is attempted with no module specified has [...]

2109, 2020

C-FER Presenting Virtually at the 2020 International Pipeline Conference!

September 21, 2020|

Several of C-FER's employees will be presenting papers at the upcoming International Pipeline Conference's (IPC 2020) Virtual event being held online September 28-30, 2020. Three papers will be in the Simulive format (presentation and live Q&A afterwards) and the remaining papers will be available on demand on the conference website. Smitha Koduru of C-FER will also be co-presenting a tutorial session on Monday, September 28, 2020, called, "An Introduction to Risk and System Wide Assessment." IPC Presentation Schedule: September 28, 2020 9:00 a.m. - 4:00 p.m. TUTORIAL - Introduction to Risk and System Wide [...]

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