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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