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V-1087 — Rich MDEA Amine Drum V-1087

Amine Treating Unit · Rich MDEA Amine service · Installed Aug 28, 2002 (24 yrs in service)

Low-Medium
Current Min. Thickness
0.398 in
t-min 0.360 in
Measured Corrosion Rate
2.01 mpy
ML-predicted: 1.73 mpy
Remaining Life
18.6 yrs
Next Inspection Due
Dec 7, 2035
Interval: 9.3 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. 2
Joint Efficiency1.00
Design Pressure268 psig
Design Temperature611 °F
Operating Pressure201 psig
Operating Temperature397 °F
Diameter48 in
Nominal Thickness0.451 in
Corrosion Allowance0.0625 in
H2S / Chloride1045 / 156 ppm
Flow Velocity12.6 ft/s
Process pH8.45
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
7.27 mpy
Predicted corrosion rate under these conditions (+5.26 mpy vs. current measured rate)
Implied Remaining Life
5.1 yrs
Implied Reinspection Interval
2.6 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 + RT40.4014 in0.3979 in
Nov 14, 2024UT Spot40.4075 in0.3904 in
Aug 14, 2021UT Grid (API 572)40.4139 in0.4134 in
May 2, 2019UT Spot40.4160 in0.4135 in
Jul 3, 2016UT Grid + RT40.4255 in0.4195 in
Jan 27, 2015UT Spot40.4264 in0.4085 in
Jul 24, 2013UT Grid + RT40.4289 in0.4217 in
Jul 10, 2011UT Grid + RT40.4368 in0.4213 in
Dec 2, 2009UT Grid + RT40.4372 in0.4268 in
Jan 8, 2007UT Spot40.4416 in0.4390 in
Mar 6, 2005UT Spot40.4450 in0.4399 in