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Front End Engineering Consultancy

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

GPA Glycol Dehydration

TEG circulation rate

Glycol dehydration screening — water removed, TEG circulation rate, and an estimated regenerator reboiler duty for a lean/rich TEG loop.

L = W · RRun

NACE MR0175 / ISO 15156

Sour service check (NACE MR0175)

Determine whether a service is sour per NACE MR0175 / ISO 15156 from the H2S partial pressure.

p_H₂S = y · PRun

API 521 / API 520 / API 526

PSV fire-case sizing (API 521)

Wetted-vessel pool-fire relief rate and PSV orifice per API 521 / API 520 — heat input, vapor relief rate, and the API 526 letter.

Q = 34500 · F · A^0.82Run

TEMA / Heat Transfer

Heat exchanger LMTD

Shell-and-tube duty or area from the log-mean temperature difference — counterflow LMTD with a correction factor.

Q = U · A · F · LMTDRun

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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