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V-1319 — Coker Vapor Drum V-1319

Catalytic Reformer · Coker Vapor service · Installed Aug 27, 2006 (20 yrs in service)

Low-Medium
Current Min. Thickness
0.774 in
t-min 0.672 in
Measured Corrosion Rate
0.64 mpy
ML-predicted: 0.92 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 Pressure540 psig
Design Temperature330 °F
Operating Pressure453 psig
Operating Temperature207 °F
Diameter49 in
Nominal Thickness0.796 in
Corrosion Allowance0.0625 in
H2S / Chloride0 / 222 ppm
Flow Velocity17.7 ft/s
Process pH7.64
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
3.25 mpy
Predicted corrosion rate under these conditions (+2.61 mpy vs. current measured rate)
Implied Remaining Life
31.4 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 — 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 (API 572)60.7851 in0.7745 in
Jul 24, 2025UT Spot60.7844 in0.7816 in
Oct 8, 2022UT Grid + RT60.7860 in0.7794 in
Nov 24, 2020UT Spot60.7890 in0.7744 in
Dec 23, 2017UT Grid + RT60.7891 in0.7739 in
Mar 13, 2016UT Spot60.7918 in0.7799 in
Aug 31, 2014UT Spot60.7950 in0.7879 in
Feb 8, 2013UT Grid (API 572)60.7929 in0.7866 in
Mar 10, 2010UT Grid (API 572)60.7957 in0.7778 in
Aug 16, 2008UT Grid + RT60.7959 in0.7955 in