CONCEPT DEMONSTRATION
66Phillips 66Vessel Integrity Intelligence
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V-1195 — Two-Phase Hydrocarbon Drum V-1195

Alkylation Unit · Two-Phase Hydrocarbon service · Installed Aug 29, 1997 (29 yrs in service)

Low-Medium
Current Min. Thickness
1.044 in
t-min 0.977 in
Measured Corrosion Rate
1.64 mpy
ML-predicted: 1.79 mpy
Remaining Life
40.9 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 Pressure459 psig
Design Temperature448 °F
Operating Pressure313 psig
Operating Temperature416 °F
Diameter84 in
Nominal Thickness1.097 in
Corrosion Allowance0.0625 in
H2S / Chloride30 / 180 ppm
Flow Velocity15.0 ft/s
Process pH7.06
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
3.77 mpy
Predicted corrosion rate under these conditions (+2.13 mpy vs. current measured rate)
Implied Remaining Life
17.7 yrs
Implied Reinspection Interval
8.9 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 — Erosion-Corrosion

API 571 §4.2.13

Mechanical removal of protective scale by high-velocity flow or entrained solids, accelerating the underlying corrosion mechanism.

Recommended inspection approach: UT thickness at flow-direction changes (elbows, reducers); review process velocity against API RP 14E erosional velocity limits.

Inspection History

UT thickness readings, most recent first

DateMethodCML CountAvg ThicknessMin CML Thickness
Aug 22, 2026UT Grid (API 572)61.0512 in1.0443 in
Jun 4, 2024UT Grid (API 572)61.0518 in1.0383 in
Jul 29, 2022UT Grid (API 572)61.0555 in1.0400 in
Sep 14, 2019UT Spot61.0624 in1.0572 in
May 5, 2017UT Grid (API 572)61.0680 in1.0485 in
Aug 16, 2014UT Grid (API 572)61.0691 in1.0647 in
Oct 20, 2012UT Grid (API 572)61.0687 in1.0570 in
Mar 6, 2011UT Spot61.0719 in1.0693 in
Apr 21, 2008UT Spot61.0787 in1.0606 in
Dec 18, 2005UT Grid (API 572)61.0842 in1.0742 in
Jun 21, 2004UT Spot61.0859 in1.0752 in
Jan 25, 2003UT Grid (API 572)61.0893 in1.0776 in
May 5, 2000UT Grid (API 572)61.0940 in1.0889 in