What Is Fire Point?
Fire Point is the temperature at which transformer oil produces sufficient vapors to not only ignite but also sustain burning for at least five seconds. This is typically 10–20°C higher than the Flash Point and is crucial in evaluating the fire hazard of in-service or stored insulating oils.
Test Standard
IEC 259, ISO 2592 or Equivalent Closed Cup/ Cleveland Open Cup Method (where applicable)
Purpose:
Determine fire hazard risk in energized electrical equipment
Check for contamination by volatile substances (e.g., solvents, fuels)
Validate new and in-service oil safety before filling or storage
Support thermal risk assessments for energized assets
Key Gases Measured
Insulating Liquids – Measurement of Relative Permittivity, Dissipation Factor (Tan δ) and DC Resistivity.
| Oil Type | Fire Point (°C) | Condition |
|---|---|---|
| New mineral oil | ≥ 145°C | Safe |
| Aged oil | ≥ 130°C | Acceptable |
| < 125°C | Caution | Possible contamination |
| < 110°C | Unsafe | Immediate action needed |
Why Fire Point Testing Is Important
- Evaluates long-term combustion risk under heat stress
- Detects contamination from volatile organic compounds
- Required for transformer commissioning safety compliance
- Helps ensure fire-safe operation of transformers and reactors
- Provides critical input for oil selection and acceptance testing
Our Testing Process
- Vacuum-sealed sampling with barcode chain-of-custody
- Fire Point testing using Cleveland Open Cup or equivalent method
- Accurate detection of sustained flame temperature
- Controlled laboratory environment and calibrated heating systems
- ERP-integrated results with real-time alerts and compliance grading
Report Includes
- Measured Flash Point temperature (°C)
- Pass/Fail rating as per industry standards
- Deviation from manufacturer specifications (if known)
- Risk classification: Safe / Caution / Unsafe
- Recommendations for oil replacement or filtration (if needed)
Why Choose Tru-FIL?
- Fully compliant with ISO/IEC and national safety test protocols
- NABL-grade laboratory instrumentation
- Real-time data logging into AI-powered ERP
- Nationwide sample pickup and 24/7 lab operations
- Trusted by utilities, OEMs, and industrial asset managers