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<p>Lightning strike damage to domestic water piping is not well documented in technical literature, and there are few resources available to assist investigators. This study describes the failure of a ¾-inch copper water pipe embedded in the concrete foundation of a residence, triggering an insurance claim. To determine whether the failure was lightning-related, the pipe underwent a detailed metallurgical evaluation. The analysis revealed distinct physical features, including an irregularly shaped perforation with curled-in edges surrounded by a halo. Limited metallographic evidence was revealed during the evaluation including gradual wall loss from the exterior surface of the halo toward the perforation and a superficial heat-affected exterior layer within the halo. Some features found during this investigation vary from the reference reviewed, therefore adding to physical features that can guide in investigations where lightning strike is suspected.</p>

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Metallurgical Evaluation of Lightning-Related Damage to a Copper Water Pipe

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Jeffrey McDougall,
  • Keith Cline,
  • Perry Hopkins,
  • Steven Counts

摘要

Lightning strike damage to domestic water piping is not well documented in technical literature, and there are few resources available to assist investigators. This study describes the failure of a ¾-inch copper water pipe embedded in the concrete foundation of a residence, triggering an insurance claim. To determine whether the failure was lightning-related, the pipe underwent a detailed metallurgical evaluation. The analysis revealed distinct physical features, including an irregularly shaped perforation with curled-in edges surrounded by a halo. Limited metallographic evidence was revealed during the evaluation including gradual wall loss from the exterior surface of the halo toward the perforation and a superficial heat-affected exterior layer within the halo. Some features found during this investigation vary from the reference reviewed, therefore adding to physical features that can guide in investigations where lightning strike is suspected.