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Safety Valve Sizing (Vapor, Screening)

Critical-flow orifice area on API 520 basis.

Inputs

Inputs

Result

Required orifice area
0.000522 m2
Required orifice area
522.0 mm2

Learn

How to use this result.

Size the relief orifice area for vapor service.

Verify before relying.

  1. Confirm units match the input labels before trusting the result.
  2. Recompute at minimum and maximum operating cases, not just the design point.
Screening result for preliminary sizing only. Verify against the manufacturer datasheet and applicable standard before procurement or construction.

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