BS 476-7返回 Back
Test item 测试名称: fire propagation 火焰传播
Refer products 涉及产品: 塑料, 塑胶, 木板...
Test limit 限量要求:
The results on the flame spread on the material surface should smaller than 165mm from the reference measuring point.
Flame spread at 1½ minutes Final flame spread
Classification Limit Tolerance for one specimen in sample Limit Tolerance for one specimen in sample
mm mm mm mm
Class 1 165 25 165 25
Class 2 215 25 455 45
Class 3 265 25 710 75
Class 4 Exceeding Class 3 limits
Sample request 送样规格:
A minimum 9 test specimens shall be provided, and they shall be representative of the exposed surface of the product
885 mm X 270 mm X thickness (less than 50mm) x 9pcs
it is required to state the product normally used with/without an air gap behind it and the exposed face.
Lead time 测试周期:normal 10 working days
Others 其他信息:  
1. Class 0  ( BS476-6 and BS476-7 )
The material must meet the requirement of Class 1 results to BS 476: Part 7
have a sub-index I1 ≤ 6 and a total index I ≤ 12 results to BS 476 Part 6

Sample for reference 参考图片:
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Sample Report 报告样本:
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