Topic: Analyses

“Don’t Worry — We did an ILI”

Many newbies in our industry have never been without the ability to ILI a pipeline.  ILI is now considered a normal and essential part of owning and operating many pipelines. However, we should take a moment to make sure we are not losing perspective.  Let’s recall our origins.  When ILI first became a practical tool, […]

Life Cycle Risk–An HDD Example

Life cycle risk assessment is an interesting topic in and beyond the integrity management field. This article features a discussion of this special type of risk assessment applied to a certain pipeline installation method, in this case, HDD installation. In previous articles, we’ve discussed some non-regulatory integrity management program applications of pipeline risk assessment (including […]

Avoiding Missteps: Risk vs Rate of Risk

Forming a strategy to mitigate pipeline risks can be complicated by how the length of an asset impacts the numbers. Data and statistics must be carefully considered and interpreted in light of the ‘length’ factor. This article discusses a subtle but critical aspect of understanding risk on a long, linear asset like a pipeline. Risk […]

Seduced by graphics: the myth of risk management by images

While there are a number of visual techniques that can help in interpreting large amounts of data, many graphical analyses provide little to no value for in-depth risk assessment. Here we explore some common graphical techniques and discusses why they can’t replace data analyses in risk management. Seduced by Graphics: The Myth of Risk Management […]

Property Damage vs Release Volume

While we should view database-input information suspiciously, insights may nonetheless emerge.  Joel Anderson recently compared the reported property damage costs with the reported release volumes in PHMSA data 2010 to 2018. spill vol vs prop damage cost This is just pipeline spills, excluding tanks, etc.   Note this plot is log-log scale so small changes can equate […]

Pipeline Hazardous Liquid Spills Analyses

Liq Spills Analyses Here’s some more interesting work from Joel Anderson:  an examination of recent hazardous liquid spill volumes, from the PHMSA reporting databases. Analyses like these not only help us with basic understanding of pipeline releases, but also provide useful input into risk assessments.  In many cases, our estimates of location-specific loss potential are […]

Optimizing the use of Inspection Results

A limitation that continues to plague older risk assessment methodologies is the inability to fully include the results of inspections.  None dispute the value of inspection and its critical role in failure avoidance.  Yet, neither the classical statistics-centric QRA nor the common relative risk ranking methodologies, can capture inspection activity in a meaningful way. A […]