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Front End Engineering
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Engineering Tools

Free Calculators.
Principal Review.

Screening-grade engineering tools that run in your browser — no sign-up, no data leaving your device. Each ends in a straight line to a FEEC principal for project-specific sizing.

API RP 14E

API RP 14E Erosional Velocity

Screening erosional velocity and minimum line ID for two-phase oil & gas flow per API RP 14E, with an actual-velocity check.

Ve = C / √ρmRun

ISA / IEC 60534-2-1

Control Valve Cv (Liquid)

Liquid control-valve sizing per ISA/IEC 60534 — required Cv, choked-flow check, and a cavitation index.

Cv = Q · √(SG / ΔP)Run

API 520 / API 521 / API 526

Thermal Relief PSV Sizing

Liquid thermal-expansion relief for a blocked-in line — relief rate, orifice area, and the API 526 orifice letter.

Q = β · V · (dT/dt)Run

Need a project-specific sizing?

These tools are screening aids. For a defensible, code-compliant sizing, a FEEC principal scopes the work to your actual fluid, operating envelope, and standards.

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