CONCEPT DEMONSTRATION
66Phillips 66Vessel Integrity Intelligence
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V-1285 — Two-Phase Hydrocarbon Column V-1285

Fluid Catalytic Cracker · Two-Phase Hydrocarbon service · Installed Aug 26, 2008 (18 yrs in service)

Low-Medium
Current Min. Thickness
2.609 in
t-min 2.418 in
Measured Corrosion Rate
0.50 mpy
ML-predicted: 1.48 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. 1
Joint Efficiency0.85
Design Pressure592 psig
Design Temperature200 °F
Operating Pressure347 psig
Operating Temperature136 °F
Diameter136 in
Nominal Thickness2.617 in
Corrosion Allowance0.1250 in
H2S / Chloride24 / 2 ppm
Flow Velocity3.5 ft/s
Process pH6.21
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
2.66 mpy
Predicted corrosion rate under these conditions (+2.16 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 — 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)42.6149 in2.6087 in
Aug 9, 2025UT Spot42.6102 in2.5925 in
Oct 22, 2023UT Grid + RT42.6125 in2.6020 in
Nov 9, 2021UT Grid (API 572)42.6154 in2.6063 in
Jun 13, 2019UT Spot42.6126 in2.6031 in
Nov 12, 2016UT Grid (API 572)42.6145 in2.5945 in
Dec 13, 2013UT Grid (API 572)42.6176 in2.6124 in
Apr 16, 2011UT Spot42.6179 in2.6152 in