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V-1094 — Lean MDEA Amine Drum V-1094

Amine Treating Unit · Lean MDEA Amine service · Installed Aug 30, 1994 (32 yrs in service)

High
Current Min. Thickness
0.838 in
t-min 0.873 in
Measured Corrosion Rate
4.15 mpy
ML-predicted: 8.97 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-240-304L Stainless
Design CodeASME BPVC Section VIII, Div. 1
Joint Efficiency0.85
Design Pressure467 psig
Design Temperature113 °F
Operating Pressure348 psig
Operating Temperature103 °F
Diameter52 in
Nominal Thickness0.973 in
Corrosion Allowance0.0625 in
H2S / Chloride127 / 109 ppm
Flow Velocity7.5 ft/s
Process pH4.75
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
12.26 mpy
Predicted corrosion rate under these conditions (+8.11 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 + RT40.8441 in0.8379 in
Mar 12, 2026UT Grid + RT40.8438 in0.8415 in
Aug 2, 2024UT Grid (API 572)40.8513 in0.8412 in
Feb 13, 2022UT Spot40.8631 in0.8451 in
Oct 17, 2019UT Grid + RT40.8651 in0.8552 in
Dec 23, 2017UT Grid + RT40.8731 in0.8649 in
Feb 16, 2016UT Spot40.8824 in0.8778 in
Sep 20, 2013UT Grid (API 572)40.8901 in0.8743 in
Aug 12, 2010UT Grid + RT40.9078 in0.9029 in
Nov 16, 2007UT Grid + RT40.9203 in0.9059 in
May 22, 2006UT Spot40.9267 in0.9133 in
Jun 17, 2004UT Grid (API 572)40.9337 in0.9147 in
Jul 3, 2002UT Grid + RT40.9410 in0.9308 in
Oct 30, 1999UT Grid (API 572)40.9533 in0.9421 in
Mar 14, 1997UT Grid (API 572)40.9645 in0.9536 in