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  1. Bartolomew

    Test pressure depends on flange loads?

    Thanks everyone, even though some answers seem to be contradictory (as usual) this thread has been clarifying for me.
  2. Bartolomew

    Test pressure depends on flange loads?

    1.- So to perform the hydro test I calculate the test pressure using the MAWP [UG-99(b)]. This MAWP corresponds to the minimum of all the MAWP of all the parts of the tank (shell, heads, nozzles, flanges, etc.), without taking into account external forces on the nozzles and flanges due to the...
  3. Bartolomew

    Test pressure depends on flange loads?

    Let's see if I get you: 1.- I calculate the shell, heads, nozzles and flanges for internal/external pressure and some thickness (plates), schedules (pipes) and ratings (flanges) come out. 2.- Then I also apply the external forces and moments in the flanges to see if they need pad reinforcement o...
  4. Bartolomew

    Test pressure depends on flange loads?

    So... I understand now that the MAWP that we use in UG-99(b) is marked on the nameplate and basically it corresponds to the conditions of pressure test (no external loads on flanges from piping and room temperature). Then in operating conditions, with external loads applied on the flanges there...
  5. Bartolomew

    Test pressure depends on flange loads?

    Hi everybody, I am sure this is an easy question for you about ASME VIII-1: Test Pressure depends on MAWP per UG-99(b). MAWP depends on the MAWP of every essential part of the vessel per UG-98(a). If external loads are applied on flanges, the rating of flanges decreases, so do the MAWP of the...
  6. Bartolomew

    HRSG seismic loads

    I am involved in calculations of a HRSG boiler 32 m. height, 6 m. length and 3,6 m. width, horizontal tubes bundles, vertical gas flow (european type), inlet gas temperature 650ºC (1200 ºF). The tube bundles rest on two vertical perforated plates which are suspended by lugs with pins from the...
  7. Bartolomew

    HRSG boiler seismic loads.

    I am involved in structural calculations of a HRSG boiler 32 m. height, 6 m. length and 3,6 m. width, horizontal tubes bundles, vertical gas flow (european type), inlet gas temperature 650ºC (1200 ºF). The tube bundles rest on two vertical perforated plates which are suspended by lugs with pins...

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