BDS EN ISO 1182:2020

Scope of application: 

 This document specifies a test method for determining non-flammability under certain conditions of homogeneous products and of essential constituents of non-homogeneous products.

Specimens for testing:

The test specimen shall be taken from a sample large enough to be representative of the product. 

 The test specimens shall be cylindrical with diameter () mm and height ()) mm.

When the thickness of the material is different from ()) mm, specimens should be made with height ()) mm, using a sufficient number of layers of the material or considering the thickness of the material.

The layers shall occupy a horizontal position in the test specimen carrier and shall be firmly clamped without significant pressure by means of two thin steel bodies not greater than 0.5 mm in diameter to prevent an air gap between the layers. Bulk material specimens should be representative in terms of appearance, density, etc. in use

When the test specimen consists of a certain number of layers, the total density should be as close as possible to that of the product provided by the manufacturer. 

Where the component under test is likely to have ply tears, all loose fibers shall be removed prior to testing. However, the final dimensions of the test specimen shall be in accordance with this standard.

When binders or other products are applied in liquid form in thicknesses where they can be classified as essential constituents, the following procedure should be used.

•  the initial single solid specimen must be cast in a plastic tube of exact or suitable diameter. This initial specimen should be tested.

NOTE: Some shrinkage corrections may be necessary to obtain the required specimen diameter/this is determined by trial and error/.

• when this initial test specimen functions normally in the test, the remaining specimens shall be made by this method and tested.

• when this initial specimen shows unusual behavior during testing (such as splitting or detonation due to air voids), the specimen preparation method described in the standard shall be applied.

NOTE: If the test specimen exhibits flammability or swelling behavior in a manner that could damage the test equipment, the test must be terminated. Preliminary testing can be done to determine such behavior. A suitable preliminary test is to heat the specimen in a muffle furnace.

Five specimens shall be tested following the procedure given in the standard.

NOTE: More specimens may be tested when required for a classification system.

Presentation of the results

Mass loss

The mass loss, in percent, is calculated and recorded for each of the five test specimens and is presented as a percentage of the initial mass of the specimen. 

Burning with flame

Calculate and record the total duration, in seconds, of sustained flame burning for each of the five test specimens. 

Increase in temperature

The rise of each temperature in the furnace is calculated and recorded ΔT₁ = T_1,max  -T_1,f  и  ΔT₂ = T_2,max -T_2,f, in degrees Celsius, for each of the five samples.

For each of the five specimens, the average temperature rise was calculated and recorded ΔT  = (ΔT₁ + ΔT₂)/2, in degrees Celsius.