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V-1296 — Rich MDEA Amine Drum V-1296

Amine Treating Unit · Rich MDEA Amine service · Installed Aug 24, 2016 (10 yrs in service)

High
Current Min. Thickness
1.679 in
t-min 1.671 in
Measured Corrosion Rate
8.01 mpy
ML-predicted: 12.92 mpy
Remaining Life
0.9 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 Pressure588 psig
Design Temperature230 °F
Operating Pressure369 psig
Operating Temperature169 °F
Diameter84 in
Nominal Thickness1.776 in
Corrosion Allowance0.0625 in
H2S / Chloride1097 / 50 ppm
Flow Velocity13.5 ft/s
Process pH4.12
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
14.30 mpy
Predicted corrosion rate under these conditions (+6.29 mpy vs. current measured rate)
Implied Remaining Life
0.5 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 (API 572)41.6974 in1.6788 in
Jun 6, 2024UT Grid (API 572)41.7128 in1.6959 in
Apr 1, 2022UT Spot41.7337 in1.7164 in
Feb 16, 2019UT Spot41.7584 in1.7509 in