ISO 3795

Flammability

Specifies a method for determining the horizontal burning rate of materials used in the occupant compartment of vehicles, after exposure to a small flame. This method permits testing of materials and parts of the vehicle interior equipment individually or in combination up to a thickness of 13 mm. Some figures illustrate shapes and reference quantities of concern. This second edition cancels and replaces the first edition (1976).

Source: https://www.iso.org/standard/9328.html