Single Combustion Tester For Building Materials Or Products

Testing principle

Place the sample in a 30-kw diffusion flame. The combustion gas is collected by the exhaust hood for analysis. Through gas analysis, the heat release rate of the sample can be calculated based on the depletion of oxygen.

The generation of smoke is evaluated by measuring the attenuation of the light beam caused by smoke in the exhaust pipe. Observe the combustion behavior of the sample to understand the spread of the flame and the appearance of combustion particles and droplets.

1, Applicable scope:

The method used to determine the fire response performance of building materials or products (excluding paving materials and products specified in EC Resolution 2000/147/EC) in a single unit combustion test (SBI).

2, Compliant with standards:

Complies with the requirements of GB/T 20284-2006 standard "Single Body Combustion Test for Building Materials or Products" and EN13823 "Single Body Combustion Test Method (SBI)" test standards.

3, Performance parameters:

The equipment includes a combustion test room, a control room, a small cart, smoke exhaust pipes, a data collection and analysis device, and a gas supply control device.

• Combustion test room: L3000×W3000×H2400 (MM), with a collection hood and smoke exhaust pipe connected to the sampling pipeline at the top of the room, and a space for natural air entry and exit below the small cart. During the experiment, the heat released by the combustion of the sample and the combustion products must be discharged from the exhaust pipe and built with brick walls.
• The ignition source is a 31KW propane right angle sandbox burner placed in the vertical corner of the small cart (with a side length of 250mm and a height of 80mm).
• A comprehensive sampling area is set up in the smoke exhaust duct for placing sensors and sampling pipes.
• Smoke exhaust speed: 0.50 m³/s to 0.65m³/s.
• Indoor environmental temperature measurement: K-type armored thermocouple with a diameter of 1mm, environmental pressure test: ± 200Pa.
• Temperature measurement of exhaust duct: an imported K-shaped armored thermocouple with a diameter of 0.5.
• Temperature measurement accuracy: 0.5 ℃.
• High precision pressure sensor for smoke exhaust duct, with an accuracy of ± 2Pa
• Time recording system accuracy: 0.1s.
• Test time: 1-30 minutes can be set.
• Smoke density measurement system, capable of measuring smoke density during the testing process.
• The gas analyzer and key components are all original imported.
• Equipped with embedded computer and 8.4-inch LCD display, with TCP/IP and RS-232 multiple communication interface options
• Oxygen measurement: Measurement range: 0-25%
• Signal output: 4-20mA;
• Response time T90: ≤ 2S;
• Environmental temperature: 0-45℃;
• Relative humidity:<90% (no condensation);
• Linearity:<±0.1% O2;
• Zero drift: 0.05% O2 (one week);
• Repeatability:<± 0.02% O2;
• Carbon dioxide (CO2) measurement:
• Measurement range: 0-10%
• Reproducibility:＜±1% Internal structure of control cabinet
• Zero drift:≤2%/week
• Range drift:≤2%/week
• Linear deviation:＜±1%
• Response time: T90≤2 s
• The data collection system can collect and record experimental data such as oxygen concentration, carbon monoxide concentration, temperature, smoke density, heat release rate, mass loss rate, etc., which can be saved.

Test report

The report contains information about the test samples and test results. The list of test results is as follows

●Figra, the fire growth rate calculated based on the heat released throughout the exposure period [watts per second].

●THR, the total heat released during the assessment period [megajoules].

●TSP, the total smoke production during the assessment period [m2].

●SMOGRA, smoke growth rate based on smoke production volume [m2/s2].

●LFS, has the lateral flame spread to the end of the long wing been observed

● Have any burning droplets been observed

The test report also includes illustrations of the subject measurements during the test process, as well as pictures of the test samples before and after the test.