CONCEPT DEMONSTRATION
66Phillips 66Vessel Integrity Intelligence
← Vessel Registry

V-1132 — Sour Water Drum V-1132

Amine Treating Unit · Sour Water service · Installed Aug 28, 2000 (26 yrs in service)

Critical
Current Min. Thickness
0.159 in
t-min 0.322 in
Measured Corrosion Rate
12.34 mpy
ML-predicted: 10.45 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. 2
Joint Efficiency0.85
Design Pressure186 psig
Design Temperature641 °F
Operating Pressure134 psig
Operating Temperature533 °F
Diameter52 in
Nominal Thickness0.490 in
Corrosion Allowance0.1250 in
H2S / Chloride697 / 76 ppm
Flow Velocity20.6 ft/s
Process pH4.72
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
8.65 mpy
Predicted corrosion rate under these conditions (-3.69 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 + RT40.1719 in0.1585 in
Dec 28, 2024UT Grid (API 572)40.1915 in0.1744 in
Jan 17, 2023UT Grid (API 572)40.2129 in0.2070 in
Nov 12, 2020UT Spot40.2403 in0.2332 in
Oct 7, 2017UT Grid + RT40.2777 in0.2766 in
Oct 8, 2014UT Grid + RT40.3131 in0.3036 in
Apr 18, 2013UT Grid (API 572)40.3299 in0.3252 in
Jun 21, 2010UT Grid (API 572)40.3669 in0.3666 in
Mar 29, 2007UT Spot40.4100 in0.4002 in
Sep 24, 2005UT Grid (API 572)40.4273 in0.4194 in
Jul 6, 2002UT Grid (API 572)40.4710 in0.4633 in