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V-1248 — Rich MDEA Amine Drum V-1248

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

Low-Medium
Current Min. Thickness
0.328 in
t-min 0.166 in
Measured Corrosion Rate
0.79 mpy
ML-predicted: 0.08 mpy
Remaining Life
60+ yrs
Next Inspection Due
Aug 19, 2036
Interval: 10.0 yrs (API 510)

UT Thickness Trend

Minimum CML reading per inspection vs. ASME Sec. VIII t-min

Vessel Specification

MaterialSA-516-70 Carbon Steel
Design CodeASME BPVC Section VIII, Div. 1
Joint Efficiency1.00
Design Pressure84 psig
Design Temperature344 °F
Operating Pressure59 psig
Operating Temperature305 °F
Diameter79 in
Nominal Thickness0.348 in
Corrosion Allowance0.1250 in
H2S / Chloride1107 / 13 ppm
Flow Velocity6.6 ft/s
Process pH7.29
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
5.97 mpy
Predicted corrosion rate under these conditions (+5.18 mpy vs. current measured rate)
Implied Remaining Life
27.1 yrs
Implied Reinspection Interval
10.0 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)80.3392 in0.3283 in
Feb 10, 2026UT Grid + RT80.3406 in0.3232 in
Jun 3, 2023UT Grid (API 572)80.3391 in0.3319 in
Jun 17, 2021UT Grid (API 572)80.3389 in0.3319 in
Jan 2, 2019UT Grid (API 572)80.3448 in0.3305 in