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V-1032 — Catalyst Slurry Column V-1032

Fluid Catalytic Cracker · Catalyst Slurry service · Installed Sep 1, 1987 (39 yrs in service)

High
Current Min. Thickness
0.358 in
t-min 0.507 in
Measured Corrosion Rate
7.89 mpy
ML-predicted: 7.79 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-387-11 Cl.2 (1.25Cr-0.5Mo)
Design CodeASME BPVC Section VIII, Div. 1
Joint Efficiency1.00
Design Pressure134 psig
Design Temperature466 °F
Operating Pressure78 psig
Operating Temperature427 °F
Diameter134 in
Nominal Thickness0.674 in
Corrosion Allowance0.0938 in
H2S / Chloride39 / 9 ppm
Flow Velocity5.9 ft/s
Process pH5.92
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
6.84 mpy
Predicted corrosion rate under these conditions (-1.05 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 — 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 + RT40.3644 in0.3582 in
May 9, 2024UT Spot40.3863 in0.3780 in
Mar 16, 2022UT Grid + RT40.4036 in0.3869 in
Jan 5, 2019UT Spot40.4323 in0.4188 in
Apr 25, 2016UT Spot40.4476 in0.4327 in
May 18, 2013UT Grid (API 572)40.4705 in0.4525 in
Feb 3, 2011UT Grid + RT40.4877 in0.4715 in
Aug 6, 2009UT Grid (API 572)40.5020 in0.4987 in
Jan 18, 2008UT Grid (API 572)40.5099 in0.4902 in
Mar 16, 2005UT Spot40.5369 in0.5241 in
Oct 17, 2003UT Grid (API 572)40.5452 in0.5447 in
Feb 28, 2002UT Spot40.5600 in0.5592 in
Jun 4, 2000UT Grid (API 572)40.5723 in0.5593 in
Sep 1, 1997UT Grid + RT40.5981 in0.5899 in
Jul 25, 1995UT Spot40.6107 in0.5947 in
Jun 4, 1992UT Spot40.6376 in0.6320 in
Jun 5, 1989UT Grid + RT40.6630 in0.6505 in