Drain Orifice Calculator
Sizes restriction orifices for condensate and liquid drains in gas systems. Ensures controlled drainage rates while preventing excessive pressure drop and downstream system overload.
System Configuration
psig
inches
inches
ft
inches
Tank & Gas Properties
gallons
ft
ft
oz/in²
Air=1
°F
Pipe Material
Results
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About This Calculator
Sizes drain orifices per API 14E to control flow and prevent tank overpressure.