Featured Project: Emergency 2-Mile Propane Pipeline Degassing – Gulf Coast Refinery (8 Hours Total)
A Gulf Coast refinery in full turnaround mode discovered it needed to urgently depressurize a 2-mile, 12-inch propane line holding liquid propane at >200 psig. An approaching tropical storm gave only a 48-hour weather window — and any delay would push the job weeks.
A competitor had just taken 4 full days to clear a shorter, lower-pressure segment. Envent was called to beat the storm and the competition.
The Challenge
- 2 miles of liquid propane at >200 psig
- Must reach 0% LEL for hot work
- <48-hour weather window before tropical storm
- Refinery in turnaround – no spare utilities or manpower
- Zero tolerance for flaring or atmospheric release
Envent’s Record-Breaking Solution – 8 Hours Start to Finish
| Equipment | Role |
|---|---|
| Dual high-rate LPG vaporizers | Liquid → vapor at maximum safe rate |
| ASME-rated liquid knockout pots + skid regulators | Protected downstream equipment |
| EMECS-70 – 70 MMBTU/hr mobile thermal oxidizer | >99.9% destruction of propane vapors |
| Nitrogen purge package | Final sweep to 0% LEL |
Execution
- Mobilized, rigged, and began vaporization same day
- Controlled depressurization with real-time pressure & LEL monitoring
- Used vaporized propane as primary fuel for the EMECS-70
- Final N₂ purge to 0% LEL and gas-free certification
Total time: <8 hours – 4× faster than the competitor’s 4-day job on a shorter, lower-pressure line.
Proven Results – Beat the Storm, Beat the Competition
| Metric | Competitor (¾-mile, 115 psig) | Envent (2-mile, >200 psig) |
|---|---|---|
| Time to 0% LEL | 4 days | <8 hours |
| Weather Window | Missed | Beat tropical storm |
| Safety Incidents | — | Zero |
| Flaring / Atmospheric Release | Yes | Zero |
This remains the fastest documented liquid propane pipeline evacuation on the Gulf Coast.
Need to degas a propane, butane, or NGL line before the next storm hits? Get your Free 8-Hour Propane Pipeline Degassing Plan & Quote today. Call Envent’s Gulf Coast Emergency Team at 888-997-9465 or email [email protected] — we clear lines faster and cleaner than anyone.
