CONCEPT DEMONSTRATION
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V-1354 — Wet CO2 Gas Drum V-1354

Delayed Coker · Wet CO2 Gas service · Installed Aug 31, 1991 (35 yrs in service)

Low
Current Min. Thickness
0.970 in
t-min 0.833 in
Measured Corrosion Rate
0.57 mpy
ML-predicted: 0.57 mpy
Remaining Life
60+ yrs
Next Inspection Due
Aug 19, 2036
Interval: 10.0 yrs (API 510)

UT Thickness Trend

Minimum CML reading per inspection vs. ASME Sec. VIII t-min

Vessel Specification

MaterialSA-516-70 Carbon Steel
Design CodeASME BPVC Section VIII, Div. 2
Joint Efficiency1.00
Design Pressure370 psig
Design Temperature131 °F
Operating Pressure232 psig
Operating Temperature91 °F
Diameter89 in
Nominal Thickness1.004 in
Corrosion Allowance0.1250 in
H2S / Chloride38 / 98 ppm
Flow Velocity21.9 ft/s
Process pH4.01
InsulatedNo

Corrosion & Remaining-Life What-If

Adjust operating conditions to see the live model-predicted corrosion rate and implied remaining life

Live Prediction — What-If Model
0.10 mpy
Predicted corrosion rate under these conditions (-0.47 mpy vs. current measured rate)
Implied Remaining Life
60+ yrs
Implied Reinspection Interval
10.0 yrs

What-if model: standardized Ridge regression, R² 0.56 on held-out fleet data (3.25 mpy MAE). Runs entirely client-side for instant feedback — see Model Insights for the full fleet-scale ensemble model used for official predictions.

Governing Damage Mechanism — CO2 (Sweet) Corrosion

API 571 §4.2.2

Carbonic-acid corrosion from dissolved CO2 in aqueous phases; rate peaks around 100–160°F and increases with velocity.

Recommended inspection approach: UT thickness grid focused on low points and water dropout locations; monitor produced-water chemistry.

Inspection History

UT thickness readings, most recent first

DateMethodCML CountAvg ThicknessMin CML Thickness
Aug 22, 2026UT Spot40.9820 in0.9697 in
Sep 16, 2024UT Spot40.9826 in0.9766 in
Jan 1, 2022UT Grid + RT40.9875 in0.9838 in
Apr 15, 2020UT Spot40.9904 in0.9897 in
Aug 22, 2017UT Spot40.9917 in0.9773 in
May 30, 2014UT Grid + RT40.9900 in0.9705 in
Aug 29, 2011UT Grid (API 572)40.9928 in0.9801 in
Feb 3, 2010UT Grid (API 572)40.9945 in0.9943 in
Jan 25, 2008UT Grid + RT40.9895 in0.9877 in
Nov 10, 2004UT Spot40.9953 in0.9942 in
Jul 5, 2002UT Grid (API 572)40.9990 in0.9854 in
Jul 10, 2000UT Grid (API 572)41.0008 in0.9940 in
Jul 22, 1998UT Spot41.0001 in0.9890 in
Jun 14, 1996UT Grid (API 572)41.0015 in0.9929 in
Jun 7, 1993UT Grid + RT41.0011 in0.9903 in