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V-1343 — Two-Phase Hydrocarbon Drum V-1343

Amine Treating Unit · Two-Phase Hydrocarbon service · Installed Aug 27, 2006 (20 yrs in service)

Low-Medium
Current Min. Thickness
0.638 in
t-min 0.473 in
Measured Corrosion Rate
0.71 mpy
ML-predicted: 0.40 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 Efficiency0.85
Design Pressure353 psig
Design Temperature230 °F
Operating Pressure234 psig
Operating Temperature169 °F
Diameter45 in
Nominal Thickness0.667 in
Corrosion Allowance0.1250 in
H2S / Chloride14 / 279 ppm
Flow Velocity5.5 ft/s
Process pH4.05
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
1.72 mpy
Predicted corrosion rate under these conditions (+1.01 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 — 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)80.6515 in0.6385 in
Jul 1, 2025UT Grid (API 572)80.6561 in0.6387 in
Aug 26, 2022UT Spot80.6546 in0.6444 in
Dec 7, 2020UT Spot80.6605 in0.6534 in
Jan 11, 2018UT Grid + RT80.6588 in0.6569 in
Dec 14, 2014UT Spot80.6625 in0.6618 in
Mar 21, 2013UT Grid (API 572)80.6666 in0.6540 in
Aug 12, 2011UT Spot80.6640 in0.6471 in
Oct 15, 2009UT Grid + RT80.6639 in0.6497 in