1 reply to this topic

[Chem_engg1996]

Hi all,

 

          I'm trying to calculate the inbreathing and outbreathing flowrate for our storage tank using API 2000. The component we are using is molten salt with 53% KNO3, 7% NaNO3, 40% NaNO2. The tanks operating pressure is 0.01 bar_g and the maximum operating temperature of the tank is 436.7 °C. As per API 2000 7th edition, the outbreathing flowrate is equal to the filling rate in to the tank. In my case the liquid in rate is 155.66 m3/hr, so the outbreathing flowrate is 155.66 m3/hr. As per the standard, for tanks operating above 49°C. the calculated flow is actual vapor flow and it needs to be converted to the air equivalent flow. Please help me with the conversion. my tanks design pressure is 0.02 bar_g and the design vacuum is -0.0041 bar_g.

Edited by Chem_engg1996, 20 February 2025 - 11:24 AM.

[Pilesar]

In API 2000, review Annex D.9 'Expressing Relief Requirements in Terms of Equivalent Air Flow' which details how to do the conversion in question.