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BS 4790：19873 [) S" p4 s# H9 n* y2 ]2 E
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Determination of the effects of a small source of ignition on textile floor coverings1 Y% \& G2 n* `( m) @
（hot metal nut method）
. r" K* L+ [7 v3 Q" n' M小火源对纺织物地板覆盖物作用效果（热金属核法）* [9 t5 }" o, l2 m: B) }
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Scope: It is applicable to all types of textile floor coverings whether loose-laid or fully adhered and used with or without an underlay/ E" [- Z3 k5 k; w& P7 q$ w
适用范围：适用于所有类型的纺织品地板覆盖物。' \" z$ l8 h. o' U* ?' c
" r- C+ P9 V9 \# N- bMethod of mounting test specimens: loose-laid ,fully adhered, loose-laid with an underlay6 c( F9 _% } J0 ?6 g4 v& r. @
样品安装方法：松铺型，完全粘附型，松铺带衬垫型* l, B1 X% J. {3 x$ l0 U. i
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Test specimen: At least 3 test specimens each measuring 300mm*300mm . h9 |6 k) z7 p9 G) L0 U8 j# W
测试样品：至少3个试样300mm*300mm- C/ Z) Y% L% J; k
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Item ) ~5 b( W0 F/ W6 D0 _: S
| Standard
! R' i% ~6 C/ N% G, B- v6 R# { | Requirement 3 T8 T7 A h3 M. G0 x, L1 s
| Flame6 f$ [7 A# W6 L4 a$ @5 Q8 [- o
| BS5287 8 K3 p) V2 g, N! Y( w3 _% p
| ⅰ）If the floor covering has a low radius(up to 35mm) of effects of ignition
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Pass
! m8 @1 E q) M% I( v如果地板覆盖物表面燃烧半径少于35mm 通过
1 M% [2 u7 p/ E5 qⅱ）If the floor covering has a medium radius(over 35 up to 75) of effects of ignition - F6 l1 x% C/ U3 F, S7 F
Pass
. g* ]" V8 [5 h+ M' G' w( P+ ?如果地板覆盖物表面燃烧半径大于35mm少于75mm 通过+ y0 {0 i @; q0 E+ ~
ⅲ）If 9 _. \( [; S6 T, `/ x
the floor covering has a high radius(over 75mm)of effects of ignition ' ]+ y" b: U8 l5 }2 [0 {& L- G3 K2 q
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Failure. U# a( p; J( }6 \" f6 z. J1 u$ F
如果地板覆盖物表面燃烧半径大于75mm 失败9 A/ b7 R( B. M9 t' ]8 ~ T U6 j
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2 F7 t& X5 T2 C: E) WConditioning: At least 24Hours in Humidity of 65+-2%and a temperature of 20degree
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