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Unusual Hydrogen Damage Failure

By: Wendy Weiss, Tony Studer, P.E. While hydrogen damage is most often associated with severe gouging on the internal surface of a tube, it can occur in the absence of gouging. Structural Integrity received four waterwall tube sections from a…

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Misuse of Flex Pipes

By: Tony Studer Flexible metal hoses exist in numerous configurations, lengths, and diameters and have found a wide range of applications. In general flexible metal hoses are used in five types of applications: To correct for misalignment To provide flexibility…

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Polythionic SCC

By: Wendy Weiss Structural Integrity Associates, Inc. (SI) was asked to examine a section of a burner gas ring from a boiler located at a chemical plant (Figure 1) and determine the cause of the corrosion and cracking. The approximately…

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