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ASTM International, 04/01/2012
Publisher: ASTM
File Format: PDF
$33.00$67.00
Published:01/04/2012
Pages:14
File Size:1 file , 280 KB
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1.1 This fire-test-response standard describes a procedure for measuring the minimum concentration of oxygen, expressed as percent volume, that will just support flaming combustion in a flowing mixture of oxygen and nitrogen.
1.2 This test method provides three testing procedures. Procedure A involves top surface ignition, Procedure B involves propagating ignition, and Procedure C is a short procedure involving the comparison with a specified minimum value of the oxygen index.
1.3 Test specimens used for this test method are prepared into one of six types of specimens (see Table 1).
Test Specimen TypeA
Dimensions
Material Form
Length, mm
Width, mm
Thickness, mm
I
80 to 150
10 ± 0.5
4 ± 0.25
for molding materials
II
for cellular materials
IIIB
≤ 10.5
for sheet materials
IVC
70 to 150
6.5 ± 0.5
3 ± 0.25
alternative size for self-supporting molding or sheet materials
VB
140 ± 5
52 ± 0.5
≤10.5
for flexible film or sheet
VIBD
140 to 200
20
0.02 to 0.10
for thin film; limited to film that can be rolled by the wire specified in 6.7
1.4 This test method provides for testing materials that are structurally self-supporting in the form of vertical bars or sheet up to 10.5-mm thick. Such materials are solid, laminated or cellular materials characterized by an apparent density greater than 15 kg/m³.
1.5 This test method also provides for testing flexible sheet or film materials, while supported vertically.
1.6 This test method is also suitable, in some cases, for cellular materials having an apparent density of less than 15 kg/m³.
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