Kiefner Study of Pipelines that Ruptured While Operating at a Hopp stress below 30% SMYS

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Pipeline and Hazardous Materials Safety AdministrationOfficial agency material

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Supplement (SUP)Kiefner Study of Pipelines that Ruptured While Operating at a Hopp stress below 30% SMYS Other; Supplement (SUP). Filed in Regulations.gov docket PHMSA-2011-0023.#

This material provides agency context. It does not replace binding regulatory text, and its legal effect depends on the underlying authority and facts.