Dear All,
I am into the project wherein a fixed roof tank is being replaced by a external floating roof tank. Need to size the auto bleeder vent as per API 2000. HSD tank, 7500 m3.
I have done with the venting rates. Pumping out is the governing case.
Now to calculate the size of the vent below is the formula as per API 2000.
A=Q / (12503*Pin * ( (1/(M*T*Z)*(k/(k-1))) * ( (Pout/Pin )^(2/k) - (Pout/Pin )^((k+1)/k) ) )^0.5 )
Now, when i am calculating for breathing in I believe Pout will be atmospheric pressure and had a query on Pin. Kindly provide some guideline on the pressure consideration to be taken for the calculation.
Best Regards,
Kartikeya