Flammable Liquids PSR Requirements in Ontario (Regulation 851 Section 7 Guide)
Flammable Liquids PSR Requirements in Ontario (Regulation 851 Section 7 Guide)
Flammable liquid processes are a major trigger for a Pre-Start Health & Safety Review (PSR) under Ontario Regulation 851 – Industrial Establishments, Section 7.
If your facility introduces or modifies flammable liquid handling systems — including storage, dispensing, or spray operations — a PSR may be required before startup.
Start with the full trigger determination guide:
Regulation 851 PSR Trigger Determination
Related high-risk PSR triggers include:
Compliance Snapshot – Flammable Liquids PSR
- Legislation: O. Reg. 851, Section 7
- Trigger Category: Flammable liquids
- Typical Systems: Storage, dispensing, spray booths, fuel systems
- Engineer Requirement: Ontario-licensed Professional Engineer
- Timing: Before operation or worker exposure
What Qualifies as a Flammable Liquid Process?
Flammable and combustible liquids include substances that can ignite when exposed to ignition sources such as sparks, heat, or open flames.
Common industrial applications include:
- Spray painting operations
- Solvent use and handling
- Fuel storage and dispensing
- Chemical processing systems
These systems often require compliance with both Ontario Regulation 851 and applicable NFPA standards.
When Do Flammable Liquids Trigger a PSR?
A PSR may be required when:
- New flammable liquid storage systems are installed
- Spray booths or spray operations are introduced
- Fuel or solvent dispensing systems are added
- Existing systems are modified or expanded
The determining factor is whether the process introduces a risk of fire or explosion under Section 7.
Common Compliance Failures
- Improper ventilation in spray operations
- Lack of explosion-proof electrical equipment
- Improper storage of flammable liquids
- No ignition source control strategy
- Failure to assess vapor accumulation risks
These issues are frequently identified during inspections and can lead to enforcement under the OHSA.
Engineering Review Elements in a Flammable Liquids PSR
- Hazard identification and vapor risk analysis
- Ventilation and airflow assessment
- Ignition source control
- Electrical classification review (hazardous locations)
- Storage and containment evaluation
- Compliance with NFPA and applicable standards
Related Fire Safety Resources
PSR Services for Flammable Liquid Systems
HITE Engineering provides PSR trigger determination and full engineering review for flammable liquid processes across Ontario.
Pre-Start Health & Safety Review Services
Need a Flammable Liquids PSR?
Contact HITE Engineering before commissioning new liquid handling or spray systems.
FAQ: Flammable Liquids PSR Ontario
Do flammable liquid systems require a PSR in Ontario?
They may. If the process introduces a fire or explosion hazard under Section 7, a PSR is required.
Do spray booths require a PSR?
Yes, many spray operations trigger PSR requirements depending on their configuration and hazard level.
Are NFPA standards used in PSRs?
Yes. NFPA standards are commonly referenced when evaluating flammable liquid hazards.
Who approves a flammable liquids PSR?
A Professional Engineer licensed in Ontario must conduct or approve the review.
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