Fire classes – meaning

What is the meaning of the different fire classes?

Acoustic foams without supplemental intumescent paint/fire protection are usually used for building loudspeakers or in facilities where no fire regulations or fire classes are required.

Acoustic foams of the fire class B2 inspection DIN 4102
The appropriate test standard is available here for download

Acoustic foams of the fire class B1 inspection DIN 4102
The appropriate test standard is available here for download

Acoustic foams of the fire class FMVSS 302 DIN 75200
are usually used in the automotive industry and in engineering applications. At this, in the case of a fire, the flame propagation speed was lowered by adding fire retardants (4inches/minute).
The appropriate test standard is available here for download.

Acoustic foams of the fire class UL 94 HF1
are self-extinguishing and do not drip.
The appropriate test standard is available here for download.

Acoustic foams of the fire class FAR 25.853
FAR 25.853 vertical burn test was carried out by the Lufthansa laboratories in Hamburg and documented under the test certificate of the Lufthansa Technik AG, official approval number 6040/2005. This is certificate, officially recognized by the Luftfahrtbundesamt, also known as Flammability Material Test Certificate FAR25.853. During this procedure, a sample is vertically subject to an 800C° Bunsen burner flame for duration of 12 seconds. The flame has to extinguish itself within 15 seconds. Also it must not spread more than 8 inches (203mm).

The appropriate test standard (test result aixFOAM acoustic foam) is available here for download.

We recommend clarifying your required fire rating with the local authorities.