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BS476-7/BS 476-7:1997 火焰表面延伸等級測試

BS 476-7:1997 火焰表面延伸等級測試

 

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: 對建筑材料和結(jié)構(gòu)的著火試驗-第7部分:產(chǎn)品火焰表面延伸等級確定的測試方法。

 

BS 476-7:1997 測試方法

 

測試方法是在燃燒箱內(nèi)點燃燒樣品,點燃源為燃氣輻射板及中型燃氣噴燈。輻射板的輻射強度在離75mm處為32.5kw/m2(表面),噴燈的火焰高75-100mm, 與輻射板在同一方向施加于試樣。

樣品暴露在輻射熱源板下10min。記錄1.5分鐘及10分鐘樣品的火焰?zhèn)鞑コ潭取y試結(jié)果分成4個等級,4級材料火災(zāi)危險性很高,不允許用為建材。

 

BS 476-7:1997 火焰表面延伸等級評估

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

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BS 476 相關(guān)參考標準

BS 476: Fire tests on building materials and structures

BS 476: 建筑材料及構(gòu)件防火測試

 

BS 476-3:2004 external fire exposure roof test

BS 476-3:2004 室外屋頂?shù)娜紵郎y試

 

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

BS 476-4:1970 材料的不燃燒性測試

 

BS 476-5:1979 Method of test of ignitability

BS 476-5:1979 可燃性燃燒測試

 

BS476-6:1989 Method of test for propagation for materials

BS476-6:1989 制品火勢蔓延的試驗方法

 

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

BS 476-7:1997制品表面火勢蔓延的試驗和分級方法

 

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

BS 476-11:1982建筑材料熱輻射性能測試方法

 

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

BS 476-12:1991產(chǎn)品直接火焰沖擊的可燃性測試方法

 

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

BS 476-15:1992產(chǎn)品放熱性測試-錐形量熱儀

 

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

BS 476-20:1987建筑構(gòu)件耐火的測定方法(一般原理)

 

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

BS 476-21:1987 承重構(gòu)件耐火的測定方法

 

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

BS 476-22:1987非承重建筑構(gòu)件耐火性能測試方法

 

 

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