Dear All,
I would like to ask you some question concerning vent sizing (my first calculation). After calculating the venting requirements according the API 2000, I want now to size the vent (diameter) and I need some information:
- What are the criteria in term of velocity and pressure drop we have to follow when doing the line sizing of the vent?
- What will be the pressure drop ? do we consider only 2 elbows, pipe entrance and exit ? is there any assumption for the straight pipe length and for the insect/dust screen pressure drop?
- The total pressure drop is the design pressure of the tank (overpressure) is it correct ? how do we calculate the negative design pressure (vacuum)?
- In case of outbreathing of water storage tank, do we use the air properties to do the calculation? (there are no properties of water vapor at standard conditions)
Your help would be greatly appreciated.
Thanks in advance.
Best regards.
Zakaria