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BS 6853 Annex B: toxicity test
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Infomation

BS 6853 Annex B: Determination of weighted summation of toxic fume, R
 
There are two different test methods which can be utilized to determine the toxic fumes produced from materials to be placed on passenger carrying trains in the UK:

BS 6853 Annex B.1 is utilized for Minor Use Materials (Tables 7 and 8 of BS 6853: 1999), Textiles (Table 11 of BS6853: 1999) and Cables (Tables 13 and 14of BS 6853: 1999).

BS 6853 Annex B.2 is utilized for Surface Materials (Tables 1, 2, 3, 4, 5 and 6), Seat Trim Materials & Seat Shell Materials (Tables 9 & 10) and Mattresses (Table12).

The gases which are analysed are as follows
 Carbon monoxide (CO)
 Carbon Dioxide (CO2)
 Hydrogen Bromide (HBr)
 Hydrogen Chloride (HCl)
 Hydrogen Cyanide (HCN)
 Hydrogen Fluoride (HF) 
 Nitrous Oxides (NOx)
 Sulphur Dioxide (SO2)

Calculated “R” value

Application BS 6853 Annex B Fire testing materials
Rubber product、rubber seal
Ceiling covering
Walling covering
Textile、curtain、adumbral product、Non-woven fabrics
Seat shell、seat trim
Flooring covering
Foam material、sponge、melamine foam
Paint、adhesives、pigment、varnish
FRP、FPP composite materials、SMC sheet
Adhesives、glue
Window、door and framework
Small parts
Connector、connected equipment
Pipe、cooling pipe、heat pipe
Other materials

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