CONCEPT DEMONSTRATION
66Phillips 66Vessel Integrity Intelligence
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V-1129 — Steam Condensate Drum V-1129

Delayed Coker · Steam Condensate service · Installed Aug 31, 1989 (37 yrs in service)

Medium
Current Min. Thickness
0.477 in
t-min 0.479 in
Measured Corrosion Rate
4.98 mpy
ML-predicted: 4.32 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 Pressure311 psig
Design Temperature348 °F
Operating Pressure249 psig
Operating Temperature312 °F
Diameter46 in
Nominal Thickness0.667 in
Corrosion Allowance0.1250 in
H2S / Chloride11 / 150 ppm
Flow Velocity16.8 ft/s
Process pH6.41
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
5.30 mpy
Predicted corrosion rate under these conditions (+0.32 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 — General Corrosion

API 571 §4.2.1

Uniform thinning across the surface due to the process environment. Rate depends on fluid chemistry, temperature, and velocity.

Recommended inspection approach: UT thickness grid at fixed CMLs per API 510/572; trend over time to establish long-term rate.

Inspection History

UT thickness readings, most recent first

DateMethodCML CountAvg ThicknessMin CML Thickness
Aug 22, 2026UT Grid (API 572)80.4846 in0.4769 in
Aug 18, 2024UT Grid (API 572)80.4943 in0.4879 in
Dec 26, 2022UT Spot80.4985 in0.4951 in
May 25, 2020UT Grid (API 572)80.5139 in0.4987 in
Aug 13, 2018UT Grid (API 572)80.5232 in0.5169 in
Aug 5, 2015UT Grid + RT80.5342 in0.5272 in
Sep 7, 2012UT Spot80.5486 in0.5345 in
Oct 18, 2009UT Grid (API 572)80.5645 in0.5518 in
Apr 11, 2007UT Grid (API 572)80.5796 in0.5718 in
Apr 19, 2005UT Spot80.5856 in0.5814 in
Mar 20, 2002UT Grid (API 572)80.6018 in0.5865 in
Dec 19, 1999UT Grid (API 572)80.6140 in0.6061 in
Jul 28, 1997UT Spot80.6319 in0.6209 in
Apr 20, 1994UT Grid + RT80.6407 in0.6317 in
Jan 1, 1992UT Grid (API 572)80.6565 in0.6443 in