CONCEPT DEMONSTRATION
66Phillips 66Vessel Integrity Intelligence
← Vessel Registry

V-1063 — Hydrotreater Feed Drum V-1063

Delayed Coker · Hydrotreater Feed service · Installed Aug 27, 2005 (21 yrs in service)

Critical
Current Min. Thickness
0.434 in
t-min 0.479 in
Measured Corrosion Rate
10.58 mpy
ML-predicted: 9.65 mpy
Remaining Life
0.0 yrs
Next Inspection Due
Feb 20, 2027
Interval: 0.5 yrs (API 510)

UT Thickness Trend

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

Vessel Specification

MaterialSA-387-11 Cl.2 (1.25Cr-0.5Mo)
Design CodeASME BPVC Section VIII, Div. 1
Joint Efficiency0.85
Design Pressure221 psig
Design Temperature741 °F
Operating Pressure180 psig
Operating Temperature654 °F
Diameter65 in
Nominal Thickness0.667 in
Corrosion Allowance0.1250 in
H2S / Chloride38 / 14 ppm
Flow Velocity10.5 ft/s
Process pH4.31
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
8.85 mpy
Predicted corrosion rate under these conditions (-1.73 mpy vs. current measured rate)
Implied Remaining Life
0.0 yrs
Implied Reinspection Interval
0.5 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 — High-Temperature Sulfidation

API 571 §4.2.11

Reaction of sulfur compounds with steel at high temperature (>500°F) in the absence of water; rate governed by sulfur content, temperature, alloy content.

Recommended inspection approach: UT thickness per Modified McConomy-curve risk ranking; RT/UT at known high-rate locations identified by process simulation.

Inspection History

UT thickness readings, most recent first

DateMethodCML CountAvg ThicknessMin CML Thickness
Aug 22, 2026UT Grid (API 572)80.4460 in0.4345 in
Jul 5, 2024UT Grid + RT80.4661 in0.4617 in
Jul 20, 2022UT Grid (API 572)80.4898 in0.4856 in
Jan 27, 2020UT Grid (API 572)80.5163 in0.5025 in
Oct 7, 2017UT Grid + RT80.5378 in0.5198 in
Jul 19, 2014UT Grid (API 572)80.5734 in0.5691 in
Dec 15, 2012UT Spot80.5910 in0.5828 in
Jun 6, 2011UT Grid + RT80.6085 in0.5961 in
Dec 6, 2008UT Grid (API 572)80.6321 in0.6274 in
Mar 18, 2007UT Grid + RT80.6513 in0.6428 in