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V-1327 — Steam Condensate Column V-1327

Fluid Catalytic Cracker · Steam Condensate service · Installed Aug 24, 2017 (9 yrs in service)

Low
Current Min. Thickness
2.283 in
t-min 2.145 in
Measured Corrosion Rate
0.70 mpy
ML-predicted: 0.51 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. 2
Joint Efficiency1.00
Design Pressure618 psig
Design Temperature510 °F
Operating Pressure499 psig
Operating Temperature479 °F
Diameter135 in
Nominal Thickness2.304 in
Corrosion Allowance0.1250 in
H2S / Chloride13 / 281 ppm
Flow Velocity4.7 ft/s
Process pH8.97
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
0.96 mpy
Predicted corrosion rate under these conditions (+0.26 mpy vs. current measured rate)
Implied Remaining Life
60+ 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 — General Corrosion

API 571 §4.2.1

Uniform thinning across the surface due to the process environment. Rate depends on fluid chemistry, temperature, and velocity.

Recommended inspection approach: UT thickness grid at fixed CMLs per API 510/572; trend over time to establish long-term rate.

Inspection History

UT thickness readings, most recent first

DateMethodCML CountAvg ThicknessMin CML Thickness
Aug 22, 2026UT Spot42.2980 in2.2833 in
Aug 23, 2023UT Grid (API 572)42.2984 in2.2945 in
Nov 6, 2020UT Grid + RT42.3012 in2.2835 in