Flame Spread Index Tester，ASTM E648 Flame propagation of carpet materials

The Flame Spread Index Tester is designed to evaluate the flame propagation characteristics of wall and ceiling lining materials. You can measure the material’s flame spread index (FSI) by exposing samples to a controlled tubular burner with a heat output of 530 J/s and monitoring the flame development over time. This tester allows you to assess fire performance accurately according to international and national standards, providing critical data for building safety, material development, and regulatory compliance.

Application

You can apply this tester in the following scenarios:

Building materials evaluation: Assess the flame spread index of wall and ceiling lining materials.

Plastic material testing: Determine vertical and horizontal flame propagation for polymer materials.

Fire safety compliance: Evaluate materials for civil, railway, and aerospace interior standards.

Quality control: Monitor production materials to ensure consistent fire performance.

Compatible test components: Tubular burner, quartz heaters, T-shaped burner, sample holders, thermocouples, and integrated computer data acquisition system.

Standards

This tester conforms to the following international and national standards:

GB/T 8624‑2012 — Classification of burning behavior of building materials and products (Flame spread index basis)

GB/T 2406.2‑2009 — Plastics combustion test, vertical burning method

GB/T 2408‑2008 — Plastics combustion test, horizontal burning method

GB/T 27904‑2011 — Flame spread test for interior decoration materials

GB/T 16172‑2007 — Determination of heat release rate and total heat release (Cone calorimeter method)

ISO 5658‑2 — Determination of flame spread index, Part 2: Small flame spread test

ISO/TR 9705‑2 — Room corner flame spread test, Part 2: Material performance evaluation

ISO 5660‑2 — Heat release rate, smoke production, and mass loss, Part 2: Flame spread method

ISO 5660‑4 — Heat release and smoke testing for automotive interior materials

ASTM E162 — Surface flammability: smoke density and flame spread

ASTM E648 — Flame propagation of carpet materials

UL 94 — Plastic material flammability: vertical and horizontal burning tests

BS 6853:1999 — Railway vehicle material flame spread, smoke density, and toxicity evaluation

BS 476‑6:1989 + A1:2009 — Fire performance test of building materials, Part 6: Small flame spread method

Parameters

Parameter	Specification
Dimensions	950 × 600 × 870 mm
Weight	105.5 kg
Heating Devices	2 × 1000 W quartz heaters providing thermal radiation
Burner Type	T-shaped tubular burner
Sample Holders	3 types, stainless steel wrapped
Thermocouples	Continuously measure temperature difference between chimney and room
Power Output Control	Automatic adjustment according to test timeline
Data Acquisition	Computer-based, report generation

Features

Durable stainless steel frame: Ensures structural stability and long-term reliability.

Silicate combustion chamber: Provides uniform and controlled testing environment.

Multiple sample holders: Accommodate different test configurations securely.

Quartz heaters: Deliver consistent thermal radiation to samples.

T-shaped burner: Provides precise direct flame for small flame spread tests.

Continuous temperature monitoring: Thermocouples record chimney versus room temperature.

Automatic power control: Heater output adjusts automatically according to test timeline.

Integrated data acquisition: Computer automatically processes data and generates test reports.

Accessories

Quartz radiation heaters (2 × 1000 W)

T-shaped tubular burner

Stainless steel sample holders (3 types)

Silicate combustion chamber

Thermocouples and mounting accessories

Integrated computer and printer with data acquisition system

Test Procedures

Install the sample in the combustion chamber using the appropriate sample holder.

Connect the G112 test gas supply.

Start the quartz heaters and T-shaped burner, providing thermal radiation and flame exposure.

Adjust heater power automatically according to the test schedule:

First 2 min 45 s: initial burner exposure at 530 J/s

At 2:45 min: increase total heater power to 1800 W

At 5 min: reduce power to 1500 W and maintain until test end

Record flame propagation, temperature, and FSI using the thermocouple and data acquisition system.

Total test duration is 20 minutes. Upon completion, safely remove the sample and review results.

Maintenance Information

Regularly clean the combustion chamber and burners to ensure consistent heat flux.

Calibrate thermocouples and power output control systems periodically.

Inspect sample holders and chamber integrity before each test.

Ensure gas supply is stable and leak-free.

Maintain ambient temperature between 10–35°C for consistent testing conditions.

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