Relief Valve Sizing Calculator
🛡️ Relief Valve Sizing Calculator
API 520/521 Compliant Relief Valve Sizing for Gas, Liquid, and Two-Phase Flow
Purpose: Size pressure relief valves according to API 520/521 standards
Applications: Fire relief, gas blowdown, liquid relief, two-phase flow
Features: Critical flow calculations, discharge coefficient selection, back pressure corrections
Applications: Fire relief, gas blowdown, liquid relief, two-phase flow
Features: Critical flow calculations, discharge coefficient selection, back pressure corrections
System Configuration
Operating Conditions
Relief Load
Fluid Properties
Installation Details
Relief Valve Sizing Results
Relief Pressure (Set + Overpressure):
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Critical Pressure:
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Flow Type:
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Back Pressure Correction (Kb):
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Required Orifice Area:
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Effective Discharge Area:
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Recommended Orifice Size:
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Valve Designation:
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Performance Verification
Actual Relief Capacity:
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Safety Margin:
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Inlet Velocity:
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Discharge Velocity:
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Pressure Drop (Inlet):
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Design Status:
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