CONCEPT DEMONSTRATION
66Phillips 66Vessel Integrity Intelligence
← Vessel Registry

V-1066 — Two-Phase Hydrocarbon Vessel V-1066

Sulfur Recovery Unit · Two-Phase Hydrocarbon service · Installed Aug 29, 1999 (27 yrs in service)

High
Current Min. Thickness
0.196 in
t-min 0.412 in
Measured Corrosion Rate
12.81 mpy
ML-predicted: 9.87 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-240-316L Stainless
Design CodeASME BPVC Section VIII, Div. 1
Joint Efficiency0.85
Design Pressure104 psig
Design Temperature424 °F
Operating Pressure76 psig
Operating Temperature324 °F
Diameter112 in
Nominal Thickness0.555 in
Corrosion Allowance0.0938 in
H2S / Chloride27 / 287 ppm
Flow Velocity3.4 ft/s
Process pH7.87
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
8.94 mpy
Predicted corrosion rate under these conditions (-3.87 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 Spot40.2094 in0.1964 in
Dec 21, 2025UT Spot40.2177 in0.2038 in
May 24, 2024UT Grid (API 572)40.2357 in0.2280 in
Apr 28, 2022UT Grid + RT40.2661 in0.2623 in
Apr 21, 2019UT Grid (API 572)40.3050 in0.2917 in
Jun 27, 2017UT Grid + RT40.3298 in0.3268 in
Apr 23, 2015UT Grid (API 572)40.3532 in0.3484 in
Sep 21, 2013UT Spot40.3709 in0.3519 in
Mar 5, 2012UT Spot40.3976 in0.3973 in
Feb 2, 2009UT Grid + RT40.4359 in0.4359 in
Jun 15, 2007UT Grid (API 572)40.4542 in0.4491 in
Dec 23, 2005UT Spot40.4718 in0.4592 in
Nov 23, 2002UT Spot40.5160 in0.5113 in
Jun 26, 2001UT Spot40.5311 in0.5182 in