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V-1219 — Boiler Feed Water Vessel V-1219

Crude Distillation Unit · Boiler Feed Water service · Installed Aug 27, 2007 (19 yrs in service)

Low
Current Min. Thickness
0.674 in
t-min 0.581 in
Measured Corrosion Rate
0.68 mpy
ML-predicted: 1.38 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 Pressure256 psig
Design Temperature394 °F
Operating Pressure158 psig
Operating Temperature362 °F
Diameter90 in
Nominal Thickness0.699 in
Corrosion Allowance0.0938 in
H2S / Chloride47 / 37 ppm
Flow Velocity16.2 ft/s
Process pH7.49
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
0.16 mpy
Predicted corrosion rate under these conditions (-0.52 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 Grid + RT60.6875 in0.6740 in
May 17, 2025UT Grid + RT60.6842 in0.6796 in
Jan 14, 2023UT Grid (API 572)60.6881 in0.6688 in
Dec 23, 2019UT Spot60.6905 in0.6767 in
Jun 19, 2018UT Grid (API 572)60.6897 in0.6715 in
Aug 7, 2015UT Grid + RT60.6914 in0.6749 in
Aug 20, 2012UT Spot60.6975 in0.6909 in
May 23, 2009UT Grid (API 572)60.6957 in0.6778 in