CONCEPT DEMONSTRATION
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V-1075 — Steam Condensate Drum V-1075

Crude Distillation Unit · Steam Condensate service · Installed Aug 31, 1988 (38 yrs in service)

Medium
Current Min. Thickness
0.861 in
t-min 0.868 in
Measured Corrosion Rate
4.42 mpy
ML-predicted: 6.03 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-240-316L Stainless
Design CodeASME BPVC Section VIII, Div. 2
Joint Efficiency1.00
Design Pressure439 psig
Design Temperature246 °F
Operating Pressure381 psig
Operating Temperature190 °F
Diameter65 in
Nominal Thickness1.039 in
Corrosion Allowance0.0938 in
H2S / Chloride28 / 141 ppm
Flow Velocity18.7 ft/s
Process pH8.39
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
7.29 mpy
Predicted corrosion rate under these conditions (+2.87 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 Spot40.8707 in0.8608 in
May 12, 2025UT Grid (API 572)40.8798 in0.8609 in
Jun 10, 2023UT Grid (API 572)40.8884 in0.8792 in
Oct 25, 2020UT Grid + RT40.8966 in0.8936 in
Mar 1, 2019UT Grid + RT40.9075 in0.8965 in
Feb 17, 2016UT Grid (API 572)40.9189 in0.9179 in
May 29, 2014UT Grid (API 572)40.9235 in0.9083 in
Nov 5, 2012UT Grid (API 572)40.9348 in0.9209 in
Apr 15, 2010UT Grid (API 572)40.9477 in0.9463 in
Aug 28, 2008UT Spot40.9506 in0.9382 in
Dec 26, 2006UT Grid + RT40.9571 in0.9493 in
Aug 7, 2005UT Spot40.9631 in0.9483 in
Jan 2, 2003UT Grid (API 572)40.9739 in0.9567 in
Aug 14, 2001UT Spot40.9838 in0.9750 in
Jul 11, 1998UT Spot40.9974 in0.9816 in
Jan 19, 1996UT Grid (API 572)41.0081 in1.0056 in
Oct 11, 1993UT Spot41.0208 in1.0192 in
Apr 10, 1991UT Spot41.0297 in1.0162 in