CONCEPT DEMONSTRATION
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V-1055 — Rich MDEA Amine Drum V-1055

Crude Distillation Unit · Rich MDEA Amine service · Installed Sep 1, 1987 (39 yrs in service)

High
Current Min. Thickness
0.092 in
t-min 0.212 in
Measured Corrosion Rate
7.39 mpy
ML-predicted: 7.72 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 Pressure133 psig
Design Temperature183 °F
Operating Pressure75 psig
Operating Temperature149 °F
Diameter53 in
Nominal Thickness0.369 in
Corrosion Allowance0.0938 in
H2S / Chloride281 / 113 ppm
Flow Velocity16.3 ft/s
Process pH4.28
InsulatedYes

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
11.81 mpy
Predicted corrosion rate under these conditions (+4.42 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 — Amine Corrosion

API 571 §4.2.4

Localized corrosion in amine treating services, accelerated by high velocity, heat-stable salts, and CO2/H2S loading.

Recommended inspection approach: UT thickness at high-turbulence points (elbows, tees, reboiler returns); monitor amine quality (HSAS, degradation products).

Inspection History

UT thickness readings, most recent first

DateMethodCML CountAvg ThicknessMin CML Thickness
Aug 22, 2026UT Grid + RT40.1060 in0.0920 in
Nov 12, 2023UT Spot40.1060 in0.0997 in
Mar 17, 2022UT Grid (API 572)40.1060 in0.0877 in
Nov 16, 2019UT Grid (API 572)40.1060 in0.0881 in
Nov 26, 2016UT Grid + RT40.1060 in0.0873 in
Oct 5, 2014UT Grid + RT40.1060 in0.1004 in
Jun 7, 2012UT Grid (API 572)40.1060 in0.1027 in
Jan 4, 2010UT Grid + RT40.1276 in0.1218 in
Jun 25, 2007UT Grid (API 572)40.1582 in0.1416 in
Aug 7, 2004UT Grid (API 572)40.1847 in0.1785 in
Sep 16, 2001UT Spot40.2164 in0.2061 in
Feb 28, 1999UT Grid (API 572)40.2484 in0.2475 in
Sep 21, 1997UT Grid (API 572)40.2625 in0.2461 in
May 26, 1995UT Grid + RT40.2843 in0.2713 in
Jul 30, 1993UT Grid + RT40.3037 in0.2905 in
May 23, 1991UT Grid + RT40.3317 in0.3126 in
Dec 22, 1989UT Grid + RT40.3455 in0.3285 in