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Unusual behaviour
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Guidance on classification
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1
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Flashing, no steady flame
|
Report furthest progress of flame and time, and whether or
not flash is on centreline. Classify on basis of the data.
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2
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Explosive spalling, no flashing or flame
|
Accept material as passing test.
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3
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Rapid flash over surface, later steady flame
progress
|
Report result for both flame fronts but classify on basis of
worst performance for each of the four test parameters in the two burning
regimes.
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4
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Specimen or veneer melts and drips off, no flame
|
Report behaviour and extent of advance on specimen.
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5
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Explosive spalling, and flame on exposed part of
specimen
|
Report explosions and classify on basis of flame progress
irrespective of whether above or below centreline
|
6
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Specimen or veneer melts, burns, and drips off
|
Reject material regardless of criteria. For floor covering,
no more than 10 burning drops are acceptable.
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7
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Pilot flame extinguished
|
Report occurrence, reject data and repeat test.
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8
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Specimen breaks up, and falls out of holder
|
Report behaviour, but classify on basis of worst
performance with and without specimen restraint in paragraph 8.3.2 of
appendix 1 to this part.
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9
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Substantial jetting combustible pyrolysis gases from
specimen, adhesive or bonding agents
|
Report that it is not classified as low
flame-spread.
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10
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Small flame remaining along the edge of
specimen
|
Report behaviour and terminate the test 3 min
after flaming on exposed surface of specimen ceased.
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