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  • Users: jnleroux
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  1. jnleroux

    API 653 FFS Evaluation for Hydrotest

    We were recently considering a hydrostatic test exemption, following API-653. The repair of the annular plate was considered major and did not fall under the shell repair or minor shell jacking sections. This left the fitness for service evaluation for hydrotest exemption. Although the...
  2. jnleroux

    API 570 Temporary Repairs

    API 570 states that “Temporary repairs may remain in place for a longer period of time only if approved and documented by the piping engineer.” Assuming a full encirclement sleeve has been designed for appropriate stress conditions, can “longer” be considered to be the life of the enclosed...
  3. jnleroux

    Atmospheric Iron Oxide Thickness

    Has anyone found a documented conversion for estimate wall loss when provided with a section of Iron Oxide taken from carbon steel? I have heard estimates ranging from 5:1 to 8:1, but have not found anything documented.
  4. jnleroux

    ASME VIII, Div 1: UG-135 PRV Inlet Size

    UG-125 states that all pressure vessels within the scope of this division, irrespective of size or pressure, shall be provided with pressure relief devices... UG-135(b)(1) states The opening through all pipe, fittings, and non reclosing pressure relief devices between a pressure vessel and its...
  5. jnleroux

    Coke Drum External Cracking

    Does anyone have experience with external cracking in the lower third of their coke drums? Also, how did you address or plan to address the situation? Thanks, John Leroux

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