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V-1096 — Coker Vapor Vessel V-1096

Delayed Coker · Coker Vapor service · Installed Aug 30, 1994 (32 yrs in service)

High
Current Min. Thickness
0.839 in
t-min 0.996 in
Measured Corrosion Rate
9.26 mpy
ML-predicted: 7.25 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 Efficiency1.00
Design Pressure270 psig
Design Temperature207 °F
Operating Pressure162 psig
Operating Temperature193 °F
Diameter122 in
Nominal Thickness1.146 in
Corrosion Allowance0.1250 in
H2S / Chloride44 / 114 ppm
Flow Velocity6.7 ft/s
Process pH4.71
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
8.62 mpy
Predicted corrosion rate under these conditions (-0.64 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 Grid + RT80.8485 in0.8388 in
Mar 4, 2026UT Grid + RT80.8548 in0.8480 in
Sep 4, 2023UT Grid + RT80.8757 in0.8619 in
Jul 11, 2020UT Grid (API 572)80.9109 in0.9039 in
Jul 14, 2018UT Grid (API 572)80.9271 in0.9128 in
Jan 7, 2017UT Grid + RT80.9382 in0.9316 in
Aug 7, 2015UT Grid (API 572)80.9509 in0.9485 in
Mar 13, 2014UT Grid + RT80.9663 in0.9603 in
Apr 24, 2012UT Grid (API 572)80.9836 in0.9737 in
Dec 1, 2010UT Spot80.9952 in0.9785 in
Feb 20, 2008UT Grid (API 572)81.0197 in1.0084 in
Nov 21, 2005UT Grid (API 572)81.0392 in1.0341 in
Mar 4, 2003UT Grid (API 572)81.0696 in1.0686 in
Nov 14, 2000UT Grid + RT81.0912 in1.0777 in
Sep 1, 1997UT Grid + RT81.1174 in1.1095 in