Executive Summary A major Canadian refinery transitioning to renewable diesel needed mobile vapour degassing of a large butane storage sphere during −30 °C winter conditions, while maintaining full mobile vapor control to prevent any release to atmosphere.
Envent mobilized two CSA-compliant EMECS-70 mobile vapor control systems plus a heated nitrogen generation system in under 24 hours. Result: <1 % LEL in <48 hours, zero visible plume, zero odour complaints, and 100 % compliance with CSA B149.3 and provincial air permits.
Project At A Glance
- Location: Western Canada
- Service: Mobile Vapour Degassing + Mobile Vapor Control Systems
- Challenge: Butane sphere degassing in −30 °C with pyrophoric risk
- Solution: Dual CSA-certified EMECS-70 + heated N₂ inerting
- Outcome: <1 % LEL in <48 hrs, zero incidents, ahead of schedule
The Challenge
- High-LEL butane vapours in large storage sphere
- Ambient temperatures below −30 °C (risk of ice formation)
- Pyrophoric iron sulfide – oxygen ingress must stay <12 %
- Must meet CCME Canada-Wide Standards and provincial air permits
- No flaring allowed – full mobile vapor control required
Envent’s CSA-Certified Mobile Vapour Degassing & Mobile Vapor Control Solution
| Equipment & Envent Service Link | Role |
|---|---|
| Dual CSA-Compliant EMECS-70 | 70 MMBTU/hr each → >99.9 % DRE of butane vapours |
| Heated Nitrogen Generation System | Pre-heated N₂ injection to prevent condensation & maintain <12 % O₂ |
| Integration with existing flare header | Seamless tie-in, zero atmospheric release |
| 24/7 Canadian-certified operators | Continuous LEL, O₂, temperature monitoring |
Performance
- Tank brought from 100 % LEL to <1 % LEL in under 48 hours
- Zero condensation or ice formation in lines
- Zero odours, zero visible plume, zero complaints
Proven Results – Winter-Ready, Regulator-Approved
| Benefit | Delivered Outcome |
|---|---|
| Speed | <48 hrs to gas-free (vs. 5–7 days conventional) |
| Safety | Heated N₂ + dual redundancy = zero pyrophoric or freeze-up risk |
| Compliance | 100 % CSA B149.3, CCME, and provincial air permit compliant |
| Environmental | >99.9 % destruction, no flaring, no venting |
| Operational | No delay to renewable diesel transition schedule |
This project set the new Canadian benchmark for mobile vapour degassing and mobile vapor control systems in cold-weather butane/LPG service.
Planning mobile vapour degassing or mobile vapor control in Canada? Get your Free CSA-Compliant Plan & Quote today. Call Envent Canada at 888-997-9465 or Request a Quote → — we’re fully CSA-certified and winter-ready.
