V-1024 — Coker Vapor Drum V-1024

Fluid Catalytic Cracker · Coker Vapor service · Installed Aug 29, 1996 (30 yrs in service)

High

Current Min. Thickness

0.216 in

t-min 0.448 in

Measured Corrosion Rate

13.47 mpy

ML-predicted: 9.11 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-240-304L Stainless

Design CodeASME BPVC Section VIII, Div. 2

Joint Efficiency0.85

Design Pressure197 psig

Design Temperature612 °F

Operating Pressure157 psig

Operating Temperature428 °F

Diameter64 in

Nominal Thickness0.612 in

Corrosion Allowance0.1250 in

H2S / Chloride37 / 168 ppm

Flow Velocity13.8 ft/s

Process pH5.60

InsulatedNo

Corrosion & Remaining-Life What-If

Adjust operating conditions to see the live model-predicted corrosion rate and implied remaining life

Operating Temperature428°F

H2S Concentration37 ppm

Chloride Concentration168 ppm

Flow Velocity13.8 ft/s

Process pH5.6

Insulated (CUI potential)

MaterialDamage Mechanism

Live Prediction — What-If Model

10.43 mpy

Predicted corrosion rate under these conditions (-3.04 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

Date	Method	CML Count	Avg Thickness	Min CML Thickness
Aug 22, 2026	UT Grid (API 572)	6	0.2239 in	0.2159 in
Dec 12, 2025	UT Grid (API 572)	6	0.2239 in	0.2084 in
Jul 25, 2024	UT Grid + RT	6	0.2239 in	0.2189 in
Nov 22, 2021	UT Grid (API 572)	6	0.2239 in	0.2222 in
Nov 12, 2019	UT Grid (API 572)	6	0.2239 in	0.2137 in
May 15, 2017	UT Grid (API 572)	6	0.2239 in	0.2192 in
Sep 14, 2015	UT Spot	6	0.2289 in	0.2151 in
Jul 14, 2013	UT Grid (API 572)	6	0.2739 in	0.2702 in
Jan 13, 2012	UT Grid (API 572)	6	0.3052 in	0.2939 in
Oct 27, 2009	UT Spot	6	0.3497 in	0.3402 in
Jan 26, 2008	UT Grid + RT	6	0.3819 in	0.3650 in
Apr 8, 2005	UT Grid + RT	6	0.4393 in	0.4216 in
Dec 18, 2002	UT Grid + RT	6	0.4850 in	0.4691 in
Jul 12, 2000	UT Spot	6	0.5349 in	0.5261 in
Sep 28, 1998	UT Grid + RT	6	0.5710 in	0.5539 in