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Open vent capacity 1
- Thread starter babak528
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1
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There is a formula in table C.2 in API 12F for a free vent that you could use.
Q = 1667 Cf A (Pt-Pa)^0.5
where
Q is the venting capacity in standard cubic feet of free air per hour (SCFH);
Cf is 0.5 (the flow coefficient);
A is the hatch area in.2 (A = 44 in.2 for 8-in. round hatch);
Pt is the absolute pressure inside the tank in inches of water;
Pa is the absolute pressure outside the tank in inches of water.
Q = 1667 Cf A (Pt-Pa)^0.5
where
Q is the venting capacity in standard cubic feet of free air per hour (SCFH);
Cf is 0.5 (the flow coefficient);
A is the hatch area in.2 (A = 44 in.2 for 8-in. round hatch);
Pt is the absolute pressure inside the tank in inches of water;
Pa is the absolute pressure outside the tank in inches of water.
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