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V-1079 — Rich MDEA Amine Drum V-1079

Delayed Coker · Rich MDEA Amine service · Installed Aug 24, 2017 (9 yrs in service)

Low-Medium
Current Min. Thickness
0.249 in
t-min 0.181 in
Measured Corrosion Rate
6.40 mpy
ML-predicted: 8.29 mpy
Remaining Life
10.6 yrs
Next Inspection Due
Dec 5, 2031
Interval: 5.3 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 Efficiency1.00
Design Pressure118 psig
Design Temperature159 °F
Operating Pressure82 psig
Operating Temperature135 °F
Diameter51 in
Nominal Thickness0.316 in
Corrosion Allowance0.0625 in
H2S / Chloride879 / 30 ppm
Flow Velocity3.3 ft/s
Process pH6.60
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
11.69 mpy
Predicted corrosion rate under these conditions (+5.29 mpy vs. current measured rate)
Implied Remaining Life
5.8 yrs
Implied Reinspection Interval
2.9 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 + RT40.2564 in0.2487 in
May 14, 2025UT Grid + RT40.2680 in0.2547 in
Apr 24, 2023UT Grid (API 572)40.2809 in0.2765 in
Jun 26, 2020UT Spot40.2964 in0.2826 in