... triggered an unexpected thinning rate due to a “synergy” of bacteria and evidence of sand inside the line at the first 23 km of the line. A significant thinning rate up to 80% NWT (Nominal Wall Thickness) was identified from ILI (In-Line Inspection) result, which triggered the pipeline replacement and more...

...Abstract In-line inspection (ILI) is a rapidly evolving field that leverages advancements in inspection technologies, software development, and miniaturization of electronic components to create more accurate, robust, and autonomous tools. These advancements have expanded the capabilities of ILI...

... assesses hazards on pipelines that were identified as difficult to pig lines. The paper will delve into the utilization of recent advancements in robotics and tethered inline inspection (ILI) tools for cleaning and inspecting buried natural gas transmission steel pipelines, formerly considered difficult...

... control strategies to changing operational conditions to maintain pipeline integrity and ensure safe, efficient operation. corrosion management sour gas trunkline pigging corrosion inhibitors chemical batching ILI dynamic decision-making INTRODUCTION Analysis/Assessment Free water analysis from...

... a comprehensive theoretical model. Additionally, operators often do not have sufficient data collected for such a model. This study introduces a novel phenomenological model which utilizes inline inspection (ILI) data and other factors, if available, to identify regions of pipelines that have a high probability...

...Pipeline Safety Regulations Gathering pipelines Pigging ILI INTRODUCTION On August 19, 2000, a 30-inch-diameter natural gas transmission pipeline ruptured adjacent to the Pecos River near Carlsbad, New Mexico. (See Figure 1 ). The released gas ignited and burned for 55 minutes. Twelve persons...

...Abstract There are several technical advantages and economic benefits of integrating inline inspection (ILI) findings and internal corrosion prediction models. ILI provides “what has happened” and model provides “why it has happened” and “how it will evolve in the future.” This approach has been...

...External corrosion 5-M methodology coatings CP aboveground surveys ILI belowground techniques INTRODUCTION External corrosion (EC) is still the leading cause of oil and gas transmission pipeline incidences ¹ . The premises of 5-M methodology is to develop strategies to “Lead...

... occurs, identifying potential internal corrosion locations is crucial for mitigation and repair. Two main methods are utilized for identifying potential locations of internal corrosion: ILI and ICDA. In-Line Inspection ICDA methodology for pipelines carrying normally dry natural gas can be found...

... corrosion growth rates from inline inspection (ILI) measurements. The paper showed exciting results: Using an xgboost algorithm^{[ 8 ]}, the algorithm achieved an "accuracy" of over 95%, where accuracy was defined as the correlation between actual and predicted values. The algorithm used hundreds...

... conditions, to develop selective seam weld corrosion (SSWC) and hook cracks due to a high content of sulfur in the pre-1980s steel. This paper describes a supplemental screening process that operators can perform as part of their due diligence. The process uses ultrasonic detection data and ILI vendor...

.... To get seamless information on pipeline conditions, different in-line inspection (ILI) technologies including a mechanical caliper tool have been under evaluation. A mismatch in internal diameter at pipe joints often caused localized liner wear, resulting in increased maintenance cost due to early...

...DISCUSSION Corrosion Stray-Current Pipeline Cathodic Protection CP Shielding ILI INTRODUCTION The company operates several thousands of kilometers of pipelines that transport oil and gas from the offshore and onshore fields. A Risk Based Inspection (RBI) approach is adopted to ensure...

... 4 Number of Off-Target Events Per Year 2014 2015 2016 2017 2018 2019 2020 2021 Total number of days 0 20 83 0 0 21 4 28 The assessment was conducted by reviewing the following: While the first ILI highlighted a total of 1,376 anomalies due to internal corrosion in two...

...PCGR Methodologies Abstract Probabilistic Corrosion Growth Rate (PCGR) models are typically studied on one or two Inline Inspections (ILIs) of a small sample size and use evaluation metrics that are operator specific. This comprehensive empirical assessment aims to expand the evaluation of PCGR...

... and costly re-inspections. This paper presents an ILI data point-to-point comparison methodology to address the damage caused by CUI so that it can be easily quantified, and its growth rate accurately estimated. This method will save time and money by decreasing expensive shutdowns and unnecessary direct...

... point to establish an integrity procedure that meets or exceeds CFR 192 requirements [ 2 ]. A case study has been provided by using External Corrosion Direct Assessment (ECDA), in-line inspection (ILI) and hydrostatic pressure test to uprate a Class 1 1983, NPS 30-inch, Coaltar coated pipeline from 50...