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V-1197 — Catalyst Slurry Column V-1197

Catalytic Reformer · Catalyst Slurry service · Installed Aug 24, 2019 (7 yrs in service)

Low-Medium
Current Min. Thickness
3.134 in
t-min 3.042 in
Measured Corrosion Rate
8.11 mpy
ML-predicted: 9.18 mpy
Remaining Life
11.3 yrs
Next Inspection Due
Apr 15, 2032
Interval: 5.7 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. 2
Joint Efficiency0.85
Design Pressure585 psig
Design Temperature254 °F
Operating Pressure447 psig
Operating Temperature178 °F
Diameter144 in
Nominal Thickness3.194 in
Corrosion Allowance0.1250 in
H2S / Chloride21 / 224 ppm
Flow Velocity17.1 ft/s
Process pH5.72
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
12.52 mpy
Predicted corrosion rate under these conditions (+4.41 mpy vs. current measured rate)
Implied Remaining Life
7.3 yrs
Implied Reinspection Interval
3.7 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 — Erosion-Corrosion

API 571 §4.2.13

Mechanical removal of protective scale by high-velocity flow or entrained solids, accelerating the underlying corrosion mechanism.

Recommended inspection approach: UT thickness at flow-direction changes (elbows, reducers); review process velocity against API RP 14E erosional velocity limits.

Inspection History

UT thickness readings, most recent first

DateMethodCML CountAvg ThicknessMin CML Thickness
Aug 22, 2026UT Grid + RT63.1372 in3.1342 in
Dec 24, 2023UT Spot63.1583 in3.1486 in
Jul 21, 2021UT Grid (API 572)63.1781 in3.1676 in