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V-1160 — Rich MDEA Amine Vessel V-1160

Fluid Catalytic Cracker · Rich MDEA Amine service · Installed Aug 30, 1995 (31 yrs in service)

High
Current Min. Thickness
0.304 in
t-min 0.613 in
Measured Corrosion Rate
15.24 mpy
ML-predicted: 12.23 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 Efficiency0.85
Design Pressure178 psig
Design Temperature368 °F
Operating Pressure116 psig
Operating Temperature262 °F
Diameter97 in
Nominal Thickness0.762 in
Corrosion Allowance0.0938 in
H2S / Chloride1328 / 148 ppm
Flow Velocity21.8 ft/s
Process pH5.00
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
14.76 mpy
Predicted corrosion rate under these conditions (-0.48 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 Spot80.3064 in0.3037 in
Nov 4, 2024UT Grid + RT80.3064 in0.2912 in
Nov 3, 2022UT Grid (API 572)80.3064 in0.2928 in
Dec 9, 2019UT Grid (API 572)80.3064 in0.2868 in
May 30, 2018UT Grid (API 572)80.3064 in0.2931 in
Aug 22, 2016UT Grid + RT80.3064 in0.2909 in
Jun 18, 2013UT Spot80.3373 in0.3353 in
Dec 13, 2011UT Grid + RT80.3720 in0.3701 in
Jan 20, 2009UT Grid + RT80.4440 in0.4394 in
Aug 22, 2006UT Grid + RT80.4984 in0.4887 in
Jan 17, 2004UT Spot80.5628 in0.5603 in
Dec 27, 2001UT Spot80.6113 in0.5915 in
Oct 31, 1998UT Grid (API 572)80.6851 in0.6826 in