Featured Project: Record-Breaking Crude Unit Decontamination – 80,000 bbl/day CDU Turnaround (EPA Refinery Sector Rule / 40 CFR 63 Subpart UUU)
An 80,000 bbl/day crude distillation unit was scheduled for a month-long planned shutdown. The de-inventory and decontamination phase — historically a 7-day bottleneck — was under intense pressure to finish faster while meeting EPA Refinery Sector Rule (RSR) flare-minimization requirements under 40 CFR §63.670(o).
The unit’s small footprint added serious congestion and safety risks.
Envent’s Goal: Cut Decon from 7 Days to Under 5 – Safely
Envent engineered and executed a high-flow, low-risk decon system that delivered 4 days total — 3 full days ahead of schedule.
| Envent Innovation | Benefit Delivered |
|---|---|
| Strategic low-point liquid drains | Eliminated carryover → protected oxidizers |
| Upsized hoses & manifolds | Reduced ΔP → higher N₂ sweep rates |
| N₂ enrichment injection ports | Kept vapors flammable → faster, cleaner destruction |
| Compact high-capacity EMTOS fleet | >99.9% DRE with minimal footprint |
| Physical barriers & traffic control | Zero congestion incidents in tight space |
| Turnaround Safety Skid | Redundant controls & real-time monitoring |
| Metric | Original Plan | Envent Result | Savings |
|---|---|---|---|
| Decontamination Duration | 7 days | 4 days | 3 days |
| Liquid Carryover | High risk | Zero | — |
| Safety Incidents | — | Zero | — |
| Flare Usage | Moderate | Zero | 100% reduction |
| Equipment Demob | 5–7 days | 48 hours | — |
Refinery Turnaround Lead Quote
“I want to express my appreciation for a job well done! The Envent team showed professionalism and a spirit of teamwork that allowed us to turn over the unit ahead of our original schedule… Thank you and we look forward to upcoming projects with Envent.”
This remains the fastest documented crude unit decontamination under the Refinery Sector Rule.
Want to cut your next CDU, FCCU, or hydrocracker decon from weeks to days? Get your Free Turnaround Acceleration Plan & Quote today. Call Envent’s Turnaround Division at 888-997-9465 or email [email protected] — we turn 7-day jobs into 4-day wins.
