Critical-flow style coefficient C and area estimate.
Educational estimate from your stated formula; confirm units and coefficients against the API edition and vendor data in use.
Coefficient C ≈ 2.6127
Required area ≈ 4.88212 (formula units — map to mm² per your code practice)
API 520/521 PSV Sizing (Gas/Vapor) helps you critical-flow style coefficient c and area estimate. It is commonly used by domain specialists, operations teams, learners for api 520, psv sizing, relief valve area.
API 520/521 PSV Sizing (Gas/Vapor)
Critical-flow style coefficient C and area estimate.
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