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  1. Allcciinneeii

    API 650 - Shell openings - Spacing of Welds around Connections

    Hello! According to item 5.7.3.4, Nozzles and manholes should not be placed in shell weld seams and reinforcing pads for nozzles and manholes should not overlap plate seams. But in case it is not feasible, then the welded shell joint shall be fully radiographed for a length equal to three...
  2. Allcciinneeii

    API 650 Tanks - bottom plates deformations

    Hello again! Thanks for the comments! The foundation is normally ring type. I´m talking about weld distortion indeed, not bottom or foundation settlement. As I could not find any applicable tolerance, except for this new information coming from JStephen "From AWWA D100-05, "Out-of-plane...
  3. Allcciinneeii

    API 650 Tanks - bottom plates deformations

    Hello! We have faced some issues during site erected tanks when it comes to bottom plates welding. Our tanks which are erected at site have their bottom plates welded by butt joints with the usage of permanent backings strips. Even taking good care during welding, considering proper welding...
  4. Allcciinneeii

    Minimum design metal temperature - concept

    What is the concept / definition of Minimum Design Metal Temperature? How can we define it for a specific design of a pressure vessel which will be installed in such a location where the minimum environment temperature is around -40ºC? My understanding is that we don't need to adopt such a low...
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