BS EN 597-2:2015 pdf free download

BS EN 597-2:2015 pdf free download.Furniture – Assessment of the ignitability of mattresses and upholstered bed bases Part 2: lgnition source: match flame equivalent.
3 Criteria of ignition
3.1 Progressive smouldering ignition
For the purposes ot this European Standard, all the following types 01 behaviour are considered to be progressive smouldering ignitions:
a) any test assembly that displays escalating combustion behaviour so that it is unsafe to continue the test and active extinction is necessary;
b) any test assembly that smoulders until it is largely consumed within the test duration;
c) any test assembly that smoulders to its full thickness, within the duration of the test;
d) any test assembly that smoulders after one hour from the application of the ignition source;
e) any test assembly that, on final examination (see 9.3), shows evidence of progressive smouldering.
NOTE In practice it has been found that there is usually a clear distinction between materials which can char under the influence of the ignition source but which do not propagate further (non-progressive combustion) and those where smouldering develops in extent and spreads (progressive combustion).
3.2 Flaming ignition
For the purposes of this European Standard, all the following types of behaviour are considered to be flaming ignitions:
a) any test assembly that displays escalating combustion behaviour so that it is unsafe to continue the test and active extinction is necessary;
b) any test assembly that burns until it Is essentially consumed within the test duration;
c) any test assembly on which any flame front reaches the lower margin, either side or passes through its full thickness within the duration of the test;
d) any flaming which continues for more than 120 s after removal of the burner tube.
4 Principle
To subject a full upper surface or upper surface characteristic features of a mattress, the bed base or the mattress pad to the contact of a gas flame which is equivalent to a match flame by placing the gas flame so that all the zones having different characteristics are tested.
5 Health and safety of operators
5.1 General
The test method specified in this European Standard presents a considerable hazard; suitable precautions shall be taken.
5.2 Enclosure
For safety, the test should be conducted in a non-combustible fume cupboard. If such a cupboard is not available, a test enclosure should be constructed (see 6.2) so that the operator is protected from the fumes.
5.3 Extinguishers
Adequate means of extinguishing the assembly should be provided, bearing in mind that some combinations may produce severe Ilaming during the test. A hand and/or fixed water spray which can be directed over the burning area can be useful. Other means such as suitable fire extinguishers, fire blankets and a bucket of water will assist.
In some cases, smouldering may be difficult to extinguish completely and complete immersion in water may be necessary.
6 Apparatus
6.1 Test rig
Consisting of a platform of expanded steel or open mesh at least 450 mm x 450 mm supported at least 75 mm above a solid base (a suitable test rig mesh is illustrated in Figure 1). The size of the mesh is not critical.
For the tests the rigs shall be sited within the enclosure (see 6.2) and the testing shall be performed in a basically draught-free environment permitting an adequate supply of air and removal of smoke from the area of the apparatus.BS EN 597-2 pdf free download.