...Abstract The primary focus of a pressurized piping systems integrity management program (IMP) is to provide safe, reliable operation. One of the preferred tools leveraged by operators is the use of in-line inspection (ILI) technologies to assess the integrity of their assets. A comprehensive...

... sizing model. Anodic Etching Abstract ILI providers use a combination of laboratory testing/modeling, pull/flow tests through pipes with manufactured anomalies and field results from verification digs to develop and improve sizing models. Lab testing has the limitation of applying results from...

... loss confirmed by inline inspection (ILI) or non-destructive techniques. In addition, the ICPM can accurately predict water and solid accumulations for the entire pipeline, enabling operators to proactively pinpoint susceptible locations and develop prevention and mitigation plans. Operators can also...

... excavations, conducted an AC interference study, and developed an enterprise wide program focused on identifying, monitoring, and mitigating AC interference. The paper examines the results of each mitigative action and process adjustment taken by the operator. AC Corrosion ILI AC Interference Interference...

...Another salient improvement is the ease in the confirmation of internal corrosion mechanisms when ILI and DA are used together to assess the integrity of pipelines. For pipelines that are easy to pig, most operators normally rely on ILI to detect internal and external corrosion defects. In internal...

...Liquid water was observed under disbonded coating at three (3) of five (5) sites (2, 3 and 5). The pH of the water under the coating (uc-water) ranged from 9.5-10 indicating that the CP was reaching this area. Abstract Most pipeline operators are using back-to-back In-line Inspection (ILI) tool...

..., and support the Company’s safety targets. Towards achieving this goal, it would be prudent to consider as many parameters as possible rather than solely the corrosion rate as obtained by corrosion coupons and corrosion probes and then establish the Inline Inspection (ILI) frequency. This paper will discuss...

...Prior to selecting appropriate ILI technologies to inspect this pipeline, the operator had first to identify and understand the types of threats that lead to the past failures of the long seam. Metallurgical test results of the long seam failures and historical knowledge of common threats...

...One probabilistic CGR model is developed based from the PRCI ⁽¹⁾ EC 1-2 project. The CGR model considers the ILI measurement uncertainty. The ratio (α) between the measured corrosion growth and the measurement error is an important parameter in determining a meaningful distribution...

... probability of failure (PoF), and estimating a corrosion rate between two consecutive inspections. The paper also reflects on experiences from applying the methodology for several different pipelines and how the results could benefit the operators. In-line inspection ILI UT inspection pipeline...

...NTSB Safety Study Direct Assessment DA In-Line Inspection ILI IIT INTRODUCTION Oil and gas pipelines have been around for well over a century, and some of the earliest constructed are still in service today. Although early pipelines were made of wood, and in the past few decades plastics...

... first was discovered, the actions taken to manage the powder, the cleaning of the pipeline and the recent inspection results. Rich Gas Pipeline Transportation Black Powder Cleaning Inspection ILI BACKGROUND / HISTORY This paper discusses a rich gas pipeline with black powder challenges...

... and ±15% in P1 for remaining wall thickness less than 4mm (0.16 in). The decay rates (D1) for the different remaining wall thicknesses are shown in Figure 8 . Though the decay rate exhibits a consistent and predictable trend, the decay rate is notably dependent on the liner thickness. Robotic ILI...

... an in-line-inspection (ILI) tool, later that year. The objective of this study was to evaluate the accuracy of the internal corrosion threat assessment when compared to actual data from an integrity assessment. The IC threat assessment based on analysis of gas quality, failure history and pigging samples...

...Abstract Multiple inspection jobs were recently completed for a western-US natural gas pipeline operator. The sections of line required reassessment as part of the operator’s ICDA program. For multiple reasons the lines were deemed unpiggable, which necessitated the use of robotic ILI tools rather...

...NDE as Verification After an ILI survey, a preliminary report is usually issued prioritizing the anomalies of higher criticality based on the estimates of the reduction of pressure calculated by the geometries of the metal loss anomalies predicted by the ILI tool. The operator then decides whether...

... of the three-phase pipelines was inspected by a magnetic flux leakage (MFL) in-line inspection (ILI) tool in 2008 after 8 years of production. The inspection showed significant internal corrosion with features measured up to 37% of wall thickness loss, primarily in first 1 mile from the drill site. Most...

... of the external corrosion and SCC found through in line inspection (ILI) tool runs is under disbonded coatings that shield CP. This has been an ongoing problem with coated and cathodically protected pipelines since the beginning of using these two technologies. Until recently the industry has not had an effective...

...The findings of each existing ILI dig were then analyzed in conjunction with the CIPS/DCVG data in order to develop an adequate prioritization protocol. For example, Figure 1 indicates that dig 30-2010 was performed in this section at chainage 1209.3. A 56% through wall pit was found, which...

... States oil company gathers and transports a variety of sour crude though its pipeline to the refinery. The system experienced leaks due to internal corrosion in the mid 90’s. The asset owner initiated an in line inspection (ILI) program shortly thereafter. The asset owner began a biocidal treatment...