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V-1105 — Rich MDEA Amine Vessel V-1105

Amine Treating Unit · Rich MDEA Amine service · Installed Aug 24, 2018 (8 yrs in service)

High
Current Min. Thickness
1.144 in
t-min 1.236 in
Measured Corrosion Rate
35.19 mpy
ML-predicted: 29.13 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. 1
Joint Efficiency1.00
Design Pressure411 psig
Design Temperature393 °F
Operating Pressure327 psig
Operating Temperature322 °F
Diameter99 in
Nominal Thickness1.433 in
Corrosion Allowance0.1250 in
H2S / Chloride1155 / 34 ppm
Flow Velocity16.9 ft/s
Process pH4.57
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
18.06 mpy
Predicted corrosion rate under these conditions (-17.13 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 + RT81.1515 in1.1438 in
Aug 20, 2025UT Spot81.1865 in1.1832 in
Jun 1, 2023UT Grid (API 572)81.2659 in1.2625 in
Apr 6, 2020UT Spot81.3758 in1.3677 in