Comparison of European and American textile flame retardant testing standards (NFP 92-503 in France and NFPA 701 in the United States)

Comparison of European and American fire-retardant fabric testing standards for fire-resistant fabrics. France’s NFP 92-503 and the United States’ NFPA 701 are used as comparison objects to analyze the differences between the two.

French fire protection standards:

NF P 92-503: Electrical burner testused for flexible materials 5mm thickness or less Fire safety—Buildings—Tests on the reaction characteristics of building materials to fire—Tests on flexible materials using electric spray guns. M1-M4 classification standards for soft materials with a thickness less than or equal to 5mm and soft filter media of various thicknesses.
NF P92-503(Electric spray gun test)
The sample is placed on a heat sink with an inclination of 30°C. A small butane flame is applied directly to the sample surface.
. The following aspects are recorded:
– Duration of flame
– Sample droplets
– The damaged length/width of the sample
NF P92-503Soft materials with a thickness less than or equal to 5mmM Level Test
The determination of the M1 to M4 classification standards for soft materials with a thickness less than or equal to 5 mm and soft filter media of various thicknesses is based on the main test results required by the NF P 92-503 standard. If necessary, The test results required by the NF P 92-505 standard can be used as a basis.
When the fuse falls and comes into contact with the resistance of the working electric spray gun, a flame will emit and burn back on the test piece. Note that if the burning time exceeds 5 seconds, it will have an impact on the test piece.
NF P92-504 (Test of flame propagation rate, as a supplement to the electrospray gun test)
The sample is placed vertically on the ignition source, which is a gas Bunsen burner. The blue flame core is 25-30MM. Counting from the free end of the sample, mark 50MM and 300MM. When the sample is placed, the long side (400mm) is horizontal and the short side ( 35mm) vertical. Test the flame propagation rate of the sample. The flame is applied to the free end of the sample for 30 seconds. The time T required for the flame to propagate through the distance between the two marks (250mm) is measured. Calculate the flame propagation rate from V=250/T. The results are divided into levels M1-M4 according to the test results. The droplets produced when the sample is burned are also recorded.
NFP92-505(Melted droplet test, also as a supplement to the electric spray gun test)
The sample was placed on a radiator under a grid, and a kapok pad was placed underneath it to collect possible droplets during combustion. The kapok pad was lit and recorded.

American fire protection testing standards: NFPA 701-1989 Comparison between NFPA701-1999

Whether it is 701-1989 or 701-1999, the purpose of the test is to evaluate the flame transmission of fabrics and film products when they are exposed to a fire source. However, the big difference between the two in their scope of application is that 701-1989 is not suitable for testing multi-layer fabrics or combination fabrics
This is only about the fire test methods NFPA701-1989 and NFPA 701-1999. A simple review and comparison of the test scope, test conditions, sample size and pass/fail criteria
1 test range
NFPA701-1989: This test method is widely adopted and used to evaluate the flame retardant properties of building interior materials, a small number of designated protective clothing or outdoor shelters such as canvas, tents and other fire-resistant materials. It is also used to evaluate the flame resistance properties of decorative or other plastic film products inside buildings that are permanently fixed on a temporary basis. However, it is not suitable for fire resistance testing of multi-layer fabrics or composite fabrics.
NFPA 701-1999, Method 1: Applicable to fabrics, window coverings, curtains, curtains, and other materials used in windows, but not applicable to vinyl-coated fabric blackout linings.
NFPA 701-1999, Method 2: Applicable to cloth, window sheets, tents, curtains, other materials used in windows, vinyl-coated fabric blackout underwear, cloth and film canvas, tents, etc.
two. Test conditions
Combustion gas ignition time
701-1989, small scale testMethane purity at least 97% 12 seconds
701-1989, large scale testMethane purity is at least 97% 2 minutes
701-1999, test 1 Methane purity is at least 97% 45 seconds
701-1999, test 2 Methane purity is at least 97% 2 minutes
3. Sample size
701-1989, small scale test3.5inch*10inch
701-1989, large scale test5inch*7 ft or 24*7 ft
701-1999, test 1 5.9inch*15.75inch
701-1999, test 2 4.9inch*147.25inch or24inch*147.25inch
4. Standard requirements:
701-1989, small scaletest
(1) After the ignition source is removed, the afterburning time of the sample shall not exceed 2 seconds.
(2) The remainder must not be burned
(3) The charring degree of the sample must meet the standard, which depends on the cloth weight.
Embers
701-1989, large scaletest
(1��After the ignition source is removed, the afterburning time of the sample shall not exceed 2 seconds.
(2) The remainder must not be burned
(3) The standard for the burnt length of the sample depends on the type of sample.
701-1999. test 1
(1) After the ignition source is removed, the afterburning time of the sample shall not exceed 2 seconds.
(2) The average burning index weight of the sample shall not exceed 40%
701-1999, test 2
(1) After the ignition source is removed, the burning time of any individual sample shall not exceed 2 seconds.
(2) The remaining burning time of any individual sample shall not exceed 2 seconds
(3) The char length of the FOLD sample must meet the standard, which depends on the type of sample.

Chemical Industry provides customers with fabric fire retardant agents, and the product testing can pass theNFPA701fire protection test. For details, please call: 400-0909-770 (no long-distance charges)

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