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66Phillips 66Vessel Integrity Intelligence
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V-1344 — Two-Phase Hydrocarbon Drum V-1344

Fluid Catalytic Cracker · Two-Phase Hydrocarbon service · Installed Aug 30, 1995 (31 yrs in service)

Low-Medium
Current Min. Thickness
0.370 in
t-min 0.204 in
Measured Corrosion Rate
0.76 mpy
ML-predicted: 0.41 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 Pressure99 psig
Design Temperature285 °F
Operating Pressure76 psig
Operating Temperature233 °F
Diameter70 in
Nominal Thickness0.408 in
Corrosion Allowance0.1250 in
H2S / Chloride44 / 215 ppm
Flow Velocity17.3 ft/s
Process pH6.98
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
1.71 mpy
Predicted corrosion rate under these conditions (+0.95 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 + RT40.3851 in0.3705 in
Dec 5, 2024UT Spot40.3869 in0.3743 in
Apr 22, 2022UT Spot40.3885 in0.3686 in
Apr 10, 2020UT Grid + RT40.3907 in0.3737 in
Sep 18, 2017UT Grid + RT40.3902 in0.3812 in
Mar 8, 2015UT Grid + RT40.3891 in0.3705 in
Jan 5, 2013UT Spot40.3918 in0.3849 in
Jan 27, 2010UT Spot40.3943 in0.3825 in
Apr 11, 2007UT Spot40.4007 in0.3955 in
Apr 12, 2005UT Grid (API 572)40.3963 in0.3829 in
May 11, 2003UT Spot40.4012 in0.4004 in
Oct 5, 2001UT Grid + RT40.4040 in0.4034 in
Jul 20, 1998UT Grid + RT40.4093 in0.3956 in