UNI VF 8457 Combustible Products with Ignition on One Surface - Response to Fire by Applying a Small Flame

The UNI VF 8457 standard, developed by the Italian National Standards Institute (UNI), describes a test method for determining the post-burn time, post-incandescence time, damaged area and drip time of a test sample exposed to the effect of a small flame applied to a face. This standard applies to products that are flammable on one side or the other, but not at the same time.

The said standard is not applicable to building materials with test methods defined in the UNI EN 13501-1 standard. This test method provides an indicative indicator of the fire response of a product in the initial stage of a fire under the influence of a limited volume source of ignition. It provides.

In short, both the UNI VF 8456 standard and the UNI VF 8457 standard focus on the following factors:

Post-burn time
Post-glare time
damaged area
Bead

Flame spread during testing is measured along the edges of a vertical or horizontal surface of the sample exposed to a flame. After flashing, the damaged area and dripping condition are observed. Depending on the factors listed above, materials are classified as follows:

Level 1: Flame propagation velocity was not measured (flame did not reach the third mark), damaged area is less than 300mm, post-flare period is less than 180 seconds, no drips or flame residues.
Level 2: Flame propagation velocity less than 30 mm/min, damaged area greater than 300 mm less than 600 mm, post-flare period more than 180 seconds Less than 360 seconds, there are drops or burning debris that extinguish after 3 seconds.
Level 3: Flame propagation velocity is more than 30 mm/min, damaged area is greater than 600 mm, post-flare period is more than 180 seconds less than 360 seconds, there are droplets or burning debris that do not go out around 3 seconds.

The UNI VF 8457 standard is considered among the important international fire protection standards.

Among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, our organization, with its trained and expert staff and advanced technological equipment, is a test to determine the reaction to fire by applying a small flame to flammable products whose surface can strike a flame, within the scope of the UNI VF 8457 standard. also provides services.