BS476-7 Flame Spread Index Tester for Building Material

The surface flame propagation test device is BS 6853 series high speed rail flame retardancy test instrument, suitable for British building materials and high speed rail flame retardancy test standard, conforming to BS 476-7. This test method is used to measure the lateral extension of the sample surface and determine the combustion grade based on the velocity and extension length.BS 476-7 is primarily used for the determination of flame extension on exposed surfaces of walls and suspended ceilings.

The test method is to measure the critical radiation flux of the sample by igniting the sample with a small flame under the gradual change of radiant heat energy.The size of the thermal radiation plate is 850mm X 850mm. The test sample bracket is water-cooled and equipped with porous calibration plate and thermal radiation flux sensor to calibrate the thermal radiation flux curve.The test instrument has a higher requirement on the laboratory site, and users need to have more safety measures to assemble the test instrument.

1. The area of the radiant panel is 850mm×850mm, strengthen the structural support frame.
2. Sample holder is perpendicular to the radiant panel with standard scale mark, it can according to the distance of the flame propagation to calculate the critical heat flux.
3. Equipped with water cooling circulation system, which can be carried out to the specimen holder, and avoid high temperature cause damage for a long time.
4. Equipped with small flame ignition device, use the electric to ignition.
5. The radiant panel equipped with flame test device, if the radiant panel flame out, it can cut off the gas automatically.
6. Equipped with electric control box, which can adjustable gas and air flow, and show the value of the heat flux.
7. Equipped with water cooling heat flux sensor.
8. PLC+ HIM, can display the information of the test.