CONCEPT DEMONSTRATION
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V-1263 — Rich MDEA Amine Vessel V-1263

Hydrocracker · Rich MDEA Amine service · Installed Aug 30, 1992 (34 yrs in service)

High
Current Min. Thickness
0.584 in
t-min 0.864 in
Measured Corrosion Rate
12.54 mpy
ML-predicted: 15.02 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 Efficiency1.00
Design Pressure215 psig
Design Temperature548 °F
Operating Pressure145 psig
Operating Temperature385 °F
Diameter142 in
Nominal Thickness1.019 in
Corrosion Allowance0.0938 in
H2S / Chloride1190 / 242 ppm
Flow Velocity7.3 ft/s
Process pH7.31
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
11.43 mpy
Predicted corrosion rate under these conditions (-1.11 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 + RT40.5953 in0.5840 in
Feb 17, 2026UT Spot40.5997 in0.5966 in
Feb 10, 2024UT Grid (API 572)40.6244 in0.6169 in
Sep 5, 2021UT Grid (API 572)40.6552 in0.6457 in
Mar 7, 2019UT Spot40.6846 in0.6800 in
Jan 3, 2016UT Grid (API 572)40.7242 in0.7215 in
Jun 27, 2014UT Grid + RT40.7462 in0.7267 in
Apr 8, 2012UT Grid (API 572)40.7761 in0.7591 in
May 3, 2009UT Grid + RT40.8081 in0.7965 in
Jan 14, 2007UT Grid + RT40.8429 in0.8422 in
May 12, 2004UT Grid + RT40.8738 in0.8713 in
Jun 13, 2002UT Spot40.8940 in0.8915 in
Nov 28, 2000UT Grid (API 572)40.9164 in0.9043 in
Aug 15, 1998UT Spot40.9480 in0.9441 in
Aug 16, 1995UT Grid (API 572)40.9813 in0.9775 in
Feb 18, 1994UT Grid + RT41.0009 in0.9819 in