Lab Fire Testing Machine Astme E84 Steiner Tunnel For Building Material Lab Testing Equipment

Calculation method of flame spread index FSI:
Measure the curve of the smoke generation and flame propagation rate of the sample, and then calculate the flame spread index (ESI) of the sample. The calculation method is: If the total area under the sample curve is AT<29.7m*in, then ESI=0.515AT
If FSI>29.7m*min. Then FSI=4900/(195-AT)

ASTME84 Standard Scope:
This 10-minute fire test response standard for comparing the burning behavior of building material surfaces is applicable to exposed surfaces such as walls and ceilings. The test is conducted with the specimen in the ceiling position with the surface to be evaluated facing downward and exposed to the ignition source. The material, product, or assembly shall be capable of being mounted in the test position during the test. The specimen shall be self-supporting by its own structural mass, secured in place by additional supports along the test surface, or secured from the back.

ASTM E84 standard applicable products:
Building materials, wallpaper, insulation materials, panel products, paints, adhesives, sealants and coatings, interior decoration.

ASTI E84 fire rating classification:
ASTM E84 Class is 0-25 mesh smoke index not exceeding 450.
ASTM E84 Class B is 26-75 day smoke index not exceeding 450.
ASTM E84 Class C 76-200 day smoke index not exceeding 450.

ASTm E84 test method for surface burning characteristics of building materials:
1.ATM E84 test is carried out by placing a 24-inch wide x 24-foot long sample into Stan's tunnel, where the test is carried out by using two burners that provide 89 energy. During the 10-minute test, the sample is installed under a removable cover on the ceiling and forced ventilation is provided so that air and combustion products move in the tunnel and enter the exhaust/scrubber system.
2. The fire spread index (RS1) is calculated based on the data recorded by the window of the ventilation room, and the computer software records the flame spread curve during the test (0 minutes). The flame spread curve is calculated based on the data recorded by the photometer system. The photometer system consists of a light source, a photoelectric tube and a special electronic device. The light passes through the ventilation room, and the computer software records the light obstruction when the light passes through the beam path during the test. The smoke area under the smoke curve is used to calculate the smoke generation index.
4: Flame propagation refers to the development of flames on the surface of materials. It is related to the fire signal and the combustible material to expand the fire. The flame propagation performance is often tested by enzyme method and radiation plate method. This ASTHE84: method is used to determine the flame propagation rate of building materials (determination of field concentration), according to ASTMB84.
The equipment used in the ASTIE84 tunnel method is a steel trough lined with refractory bricks with a length of 7.62m and an open end cross-section of 0.45m*0.30m, with windows on the side of the trough.

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