BS 6853/BS 476-7:1997 火焰表面延伸等级测试

BS 476-7:1997 火焰表面延伸等级测试

BS 476-7: Fire tests on building materials and structures-Part 7 method of test to determine the classification of the surface spread of flame of products.

BS 476-7: 对建筑材料和结构的着火试验-第7部分：产品火焰表面延伸等级确定的测试方法。

 

BS 476-7:1997 测试方法

测试方法是在燃烧箱内点燃烧样品，点燃源为燃气辐射板及中型燃气喷灯。辐射板的辐射强度在离75mm处为32.5kw/m2(表面) ，喷灯的火焰高75-100mm，与辐射板在同一方向施加于试样。

样品暴露在辐射热源板下10min。记录1.5分钟及10分钟样品的火焰传播程度。测试结果分成4个等级，BS476-7 Class 1, Class 2, Class 3,Class 4，Class 4材料火灾危险性很高，不允许用为建材。

 

BS 476-7:1997 火焰表面延伸等级评估

Classification of spread of   flame
Classification	Spread of flame at 1.5 min		Final spread of flame (10 min)
	Limit  (mm)	Limit for one specimen in sample   (mm)	Limit  (mm)	Limit for one specimen in sample  (mm)
Class 1	165	165+25	165	165+25
Class 2	215	215+25	455	455+45
Class 3	265	265+25	710	710+75
Class 4	Exceeding the limits for class 3

 

BS 476-7:1997 火焰表面延伸等级评估在BS 6853:1999标准中应用

 

BS 6853:1999 标准要求

火焰表面延伸等级评估: 最差要求为Class 2, 允许等级为Class 1或Class 2

 

BS 476 相关参考标准

BS 476: Fire tests on building materials and structures

BS 476-3:2004 external fire exposure roof test

BS 476-4:1970 Non-combustibility test for materials

BS 476-5:1979 Method of test of ignitability

BS476-6:1989+A1:2009 Method of test for propagation for materials

BS 476-7:1997 Surface spread of flame test for material

 

BS 476-11:1982 Method for assessing the heat emission from building materials

BS 476-12:1991 Ignitability of products by direct flame impingement

BS 476-15:1992 Method for measuring heat release of products-cone calorimeter

BS 476-20:1987 Method for determination of the fire resistance of elements of construction (general principles)

BS 476-21:1987 Methods for determination of the fire resistance of loadbearing elements of construction

BS 476-22:1987 Methods for determination of the fire resistance of non-loadbearing elements of construction

 

BS 476: 建筑材料及构件防火测试

BS 476-3:2004 室外屋顶的燃烧测试

BS 476-4:1970 材料不燃烧性测试

BS 476-5:1979 可燃性燃烧测试

BS476-6:1989 制品火势蔓延的试验方法

BS 476-7:1997制品表面火势蔓延的试验和分级方法

 

BS 476-11:1982建筑材料热辐射性能测试方法

BS 476-12:1991产品直接火焰冲击的可燃性测试方法

BS 476-15:1992产品放热性测试-锥形量热仪

BS 476-20:1987建筑构件耐火的测定方法(一般原理)

BS 476-21:1987 承重构件耐火的测定方法

BS 476-22:1987非承重建筑构件耐火性能测试方法

 

更多BS476-6火焰传播指数测试及BS 476标准要求，请联系南京睿督公司

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