Dear Sir,
We are converting one of the existing fuel oil storage tank to jet fuel A1 storage tank for an offshore supply vessel. We shall be installing a high velocity pressure vacuum valve for the tank on the main deck. The supplier for vent valve need to be informed on the pressure and vacuum settings of the valve. Can anyone please provide guidance on the calculation for both the set pressures. The tank are integrated tanks to the ships hull and do not have any sliding roof.
Thank you for your time.