ASTM E84 Steiner Tunnel Test Furnace | Flame Spread & Smoke Density Fire Test Equipment Manufacturer
Get a quote：
Whats/App: +86 156 1874 6768
Web: standard-groups.com
Parameters
| Parameter | Specification |
|---|---|
| Test Method | ASTM E84 / NFPA 255 / UL 723 |
| Flame Source | Dual-head nozzle of tunnel furnace |
| Test Duration | 10 minutes |
| Measured Indicators | Flame Spread Index (FSI), Smoke Developed Index (SDI) |
| FSI Classification | Class A: 0–25Class B: 26–75Class C: 76–200 |
| SDI Range | 0–450 |
| Applicable Materials | Wood, composite panels, decorative materials, insulation/thermal materials |
Features
Accurate Measurement: Quantifies fire performance through FSI and SDI values.
Multi-Standard Compliance: Supports ASTM, UL, NFPA, and other international standards.
Safe and Reliable: Controlled testing process ensures stable and repeatable data.
Easy Operation: Simple sample installation and test procedure suitable for routine lab use.
Wide Applicability: Covers interior and exterior decoration, insulation materials, and furniture panels.
Accessories
Tunnel furnace main unit
Dual-head flame nozzle
Sample mounting fixtures
Smoke collection and analysis system
Data acquisition and recording system
Test Procedures
Mount the test sample on the sample rack at the top of the tunnel furnace.
Start the tunnel furnace; flames are emitted from the dual-head nozzle onto the sample.
Conduct the test for 10 minutes, recording flame spread and smoke development.
Calculate the Flame Spread Index (FSI) based on flame propagation distance and time.
Measure the Smoke Developed Index (SDI) and classify the material according to ASTM E84 standards.
Maintenance Information
Regularly clean the flame nozzles and furnace to remove carbon deposits for uniform flame distribution.
Calibrate smoke collection devices and sensors quarterly to ensure accurate measurements.
Keep sample fixtures and supports intact to prevent deformation affecting results.
Turn off power and ventilate the lab after use to prevent smoke residue from damaging equipment.
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