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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