Through the analysis of the national standard single flame vertical spread test process

Taking Flow rate of burner when supplying fire

Temperature distribution of concentrated heat conduction during fire supply

Upward spreading speed of flame when it is not extinguished

Rising velocity of hot gas flow in combustion device main influencing factors as the analysis object

The results of vertical spread of single flame in complex or extreme cases not covered by national standards are studied

By analyzing the propagation speed of flame spread

the real flame retardant properties of the samples were further refined and distinguished

It provides a reference for the classification of flame retardancy of single vertical combustion test.