Petroleum and related products - Determination of spray ignition characteristics of fire-resistant fluids - Part 2: Spray test - Stabilised flame heat release method
1Key Takeaways
This document specifies a method by which the fire hazards of pressurised sprays of fire-resistant fluids can be compared. Two sizes of propane flame are used to ignite and stabilise combustion of an air-atomised release of fluid. Measurements related to the rate of heat release, length of flame and density of smoke gi…
2Expert Interpretation
This article provides an in-depth interpretation of the ISO 15029-2:2018 standard, which specifies a method for comparing the fire hazard of pressurized atomized fire protection fluids. Two propane flame sizes are used to ignite the fluids released by air atomization, and parameters such as heat release rate, flame length, and smoke density are measured to quantitatively evaluate the fluid's combustion behavior. This article covers the test principles, equipment configuration, calibration procedures, and grading system, providing a standardized technical solution for evaluating the performance of fire protection fluids.
Analysis of the core content of the standard
The ISO 15029-2:2018 standard uses a two-fluid atomizer to produce an atomized spray of the test fluid, and a premixed propane burner provides a stable ignition source.
- Flammability Index (RI): reflects the heat release characteristics of the fluid under a specific propane flow rate
- Flame Length Index (RL): quantifies the extension distance of the burning flame
- Smoke Density (D): evaluates the amount of smoke produced by measuring the flue opacity
Key Technical Requirements of Test Equipment
| Components | Specifications | Accuracy Requirements |
|---|---|---|
| Combustion Chamber | 2000×490×490mm (Steel) | Dimensional Tolerance±5mm |
| Propane Burner | 0.13/0.4 Nm³/h dual flow rate | Flow control±0.005Nm³/h |
| Temperature sensor | T-type thermocouple | ±0.5°C(15-200°C) |
| Fluid delivery system | 90ml/min±0.5ml/min | Pressure control±0.1MPa |
Grading system and technological evolution
In the AH grading scheme proposed in Appendix D of the standard:
- Grade A: RI>100, RL>100, D<0.01 (optimal fire protection performance)
- H grade: RI≤13 (minimum fire protection grade)
Compared with ISO 15029-1, the innovation of this standard is reflected in:
- Use of quantitative indicators instead of qualitative evaluation
- Introduction of dual flow test mode (0.13/0.4 Nm³/h)
- Establishment of standard calibration fluid system (CF0-CF90)
Implementation recommendations and safety regulations
Warning:The test involves high-pressure flammable materials, and it is necessary to ensure:
- Combustion chamber sealing verification (mineral fiber tape)
- Propane supply system leak detection
- Effective operation of exhaust gas treatment system
It is recommended to calibrate the equipment before testing (according to Appendix C) and use ethylene glycol-water mixture verification system response curve.