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Connected equipment network
Build the PFD node by node. Calculations propagate automatically — wellhead pressure and temperature cascade through every choke, separator, heater, and line to the flare in one solve.
Choke · Sep · Pipeline · Heater · PSV · KOD🌡️
Joule-Thomson temp (PR-EOS)
JT coefficient from Peng-Robinson EOS, dependent on P, T and composition. Liquid heat-capacity buffering included. Validated ±1.3°C across 5 real well reports.
Validated vs real field reports🔥
Flare & WTB radiation (API 521)
Point-source radiation for gas flares and air-atomized crude burners. Radiated fraction F(ALR) from Dutta et al. (1994) measurements. Heat-flux heatmap with water-screen correction and multi-source superposition.
API 521 · Dutta 1994 · Chamberlain⚡
PSV / PRV sizing — fully conforming
API 520 orifice area for gas, liquid and two-phase relief (HEM direct integration, Annex C). Back-pressure Kb from tabular API 520 Fig. 3-9. Inlet ΔP 3% rule (§5.1.3) verified automatically.
API 520 · API 526 · HDI method🤖
AI Copilot
Describe your test in plain language and the system builds the PFD. Analyzes results, flags out-of-spec equipment, and generates executive narrative for the report.
Powered by Claude AI📄
Automatic technical report
One click generates the Word calculation document with all results, alarms, radiation heatmaps, PSV certificates and CO₂e — ready for client or regulatory delivery.
DOCX · CO₂e · SO₂ · Heatmaps🌊
Multiphase flow correlations
Beggs-Brill for horizontal and inclined pipelines. Erosional velocity per API 14E. Elbow erosion rate with ρV² criterion. Separator gas capacity by Arnold, Bradley or droplet-settling method.
Beggs-Brill · API 14E · ρV²❄️
Hydrate prediction & inhibition
Hydrate formation temperature along the flow path. MEG/methanol injection dose. Integrated alert when choke outlet approaches the hydrate curve. Correction for H₂S and CO₂.
Hammerschmidt · Wichert-Aziz · Sour correction📊
Phase envelope P-T diagram
PR-EOS phase envelope with cricondentherm and cricondenbar. Operating points plotted on the diagram to confirm flow regime at each node. CVD retrograde dropout curve for gas condensates.
PR-EOS · Michelsen · CVD💨
Air-atomized crude burner — WTB
Air-to-oil ratio adequacy (ALR vs minimum required per Lefebvre), preheat temperature, compressor power and pressure ratio. Radiation F(ALR) validated against Dutta 1994 Alberta crude measurements.
Dutta 1994 · GPSA §13 · Lefebvre 1989🛡️
Knock-Out Drum sizing (KOD)
Horizontal KOD for the flare system per API RP 521 §4.3.3. Gas velocity criterion K = 0.035 ft/s (4× more conservative than a process separator) plus liquid surge retention ≥ 10 min.
API 521 §4.3.3 · Slug protection🌿
SO₂ emissions & GHG reporting
SO₂ mass rate for sour gas flaring (H₂S stoichiometry, η = 0.98) for ASEA/NOM-098 regulatory reporting. Full CO₂e inventory — combustion CO₂, CH₄ slip, SO₂ — per EPA AP-42 and GHG Protocol O&G.
NOM-098 · EPA AP-42 · IPCC AR6 GWP⛏️
Solids handling & cyclonic desander
Particle-size distribution defined at the wellhead, size-resolved cyclonic and screen separation, and sand mass balance propagated through the network. Sand erosion per DNV-RP-O501.
Lapple 1951 · Svarovsky 1984 · DNV-RP-O501📐
Flow metering — AGA-3 / ISO 5167
Orifice-plate gas metering with Reader-Harris/Gallagher discharge coefficient and ISO 5167 expansibility. Multiphase Venturi metering for wet streams.
AGA-3 · ISO 5167 · RHG 1998
