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Boulder City, CO, United States

Widrig J.R.,Quest Integrity Group LLC
Process Safety Progress | Year: 2011

Inspection and fitness-for-service (FFS) of critical in-plant piping systems remains an ongoing concern for the chemical industry. Recent failures in the US indicate that there is a present and severe risk in piping systems. Historically, unpiggable in-plant piping can now be inspected with advanced smart pigging technology for complete ultrasonic inspection. High-resolution inspection data is analyzed to identify the locations and degree of corrosion and piping deformations. This article discusses current industry experience with the inspection and assessment of in-plant piping systems using advanced smart pigging technology. Utilizing more advanced inline inspection and assessment technology helps operators reduce inspection costs associated with difficult-to-inspect pipelines and piping systems; reduce maintenance costs by more accurately pinpointing anomalies and assessing FFS conditions; and accurately determine the actual conditions for lines previously deemed unpiggable. © 2011 American Institute of Chemical Engineers (AIChE). Source

Widrig J.R.,Quest Integrity Group LLC | Schroetlin N.,Dakota Gasification Company
Ammonia Plant Safety and Related Facilities | Year: 2014

"We had a failure of convection tubes in our furnace. Can we restart and continue to operate until our next planned shutdown?" A brittle fracture failure of several HK-40 tubes in a convection section occurred in 2012. The failed convection section tubes were removed and submitted for metallurgical failure analysis. Hydrotesting was performed on the remaining tubes in the convection section to confirm that additional tubes were not substantially damaged and return the furnace to operation without further repairs. A failure analysis and API 579 Fitness-for-Service assessment were performed to determine the mode of failure and to determine the remaining life of the HK-40 tubes. The remaining life assessment determined the permissible existing flaw sizes in the tubes, which would not grow to a critical flaw prior to a future shutdown date. Several shutdown dates were evaluated to determine the timing of the next shutdown. This information provided the operator with a sound basis to evaluate the business and safety risks of continued operation until long-term repairs and system improvements could be implemented. Source

Shie T.,DNV GL | Shie T.,Quest Integrity Group LLC | Bubenik T.,DNV GL | Bubenik T.,Quest Integrity Group LLC | And 2 more authors.
The Journal of Pipeline Engineering | Year: 2012

Understanding the capabilities of available in-line inspection tools is a key component of accurately managing and assessing pipeline integrity. Det Norske Veritas, USA, (DNV) was retained by a pipeline operator to provide support in evaluating the Quest Integrity Group (Quest) InVista tool. The Quest InVista tool is a straight-beam ultrasonic tool that is capable of detecting and sizing dents, metal loss, and dents with metal loss. This multiple-phase project evaluated the performance of the inspection tool against its stated capabilities. The Quest tool is an emerging technology and was designed to navigate tight bends (up to 1D) and back-to-back bends. By running this test, the operator gained an independent verification of the performance specifications of a new inspection technology. To evaluate the tool, DNV (1) created a list of defects to be used for testing the tool; (2) manufactured the defects on test sections of pipe; (3) supervised the testing of the test sections; and (4) reported the results of the testing. Each stage of the project is reviewed in detail in this paper. Source

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