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Published on 05/29/2025 at 21:28
Pipelines can be one of the safest forms of hazardous material transport, but when they fail, they can cause significant damage and loss of life. Determining the cause of pipeline failures is crucial to preventing them. In their paper “Failure Analysis of a Ruptured Pipeline,” Exponent’s Alex Hudgins, Chelsea Liu, and Brad James describe the analysis of a 2013 pipeline failure in Nebraska. The pipeline was found to exhibit progressive cracking at a localized hard spot.
The authors’ analysis included visual inspection, nondestructive laser scanning, fractographic examination, metallographic examination, mechanical testing, and chemical analysis. The authors found that the pipe fractured due to hydrogen stress cracking (HSC), which can occur in high-hardness steels in the presence of a corrosive environment and high-stress state.
The materials and corrosion experts go on to describe other nondestructive and destructive tests they performed to determine the cause of the pipeline failure, including photos, charts, and the results of scanning electron microscopy (SEM). They found that a key factor in the failure was the “hard spot,” a small region of steel that was significantly harder (stronger) than the material around it, creating an area susceptible to environmental progressive cracking.
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Exponent Inc. published this content on May 29, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on May 30, 2025 at 01:27 UTC.
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Exponent, Inc., together with its subsidiaries, is a science and engineering consulting firm. The Company serves clients in chemicals, construction, consumer products, energy, food, beverage and nutrition, government, life sciences, insurance, manufacturing, technology, industrial equipment, transportation, and other sectors. It provides engineering and scientific consulting services to clients around the world. Its service offerings are provided on a project- by-project basis. The Company has two segments: Engineering and Other Scientific, and Environmental and Health. The Engineering and Other Scientific segment is a service group providing technical consulting in different practices, primarily in engineering. The Environmental and Health segment provides services in the area of environmental, epidemiology and health risk analysis. This segment provides a range of consulting services relating to environmental hazards and risks and the impact on both human health and the environment.
Buy
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