1. Standard-- BS 6853:1999 Fire testing to railway components
BS6853: 1999 Code of practice for fire precautions in the design and construction of passenger carrying trains.

2. Standard Brief-- BS 6853:1999 Fire testing to railway components
The aim of this standard is to ensure the safety of passengers in the event of fire on or around a vehicle or vehicles comprising a passenger carrying train. The standard has been extensively revised to assist railway vehicle builders in interpreting guidance from the Safety Regulatory Authority on fire performance previous edition and reflects the concern of Fire Standards Committee by upgrading the responsibilities of railway vehicle designers, builders and manufacturers, encouraging them to produce safer materials which release less toxic effluent in a fire, for future safety.
Thus adherence to the code should be considered to have provided an environment for which it has been demonstrated that:
--acceptable control of the risk of ignition has been achieved;
--acceptable control of the rate of and total emission of heat, smoke and toxic fume has been achieved for all major usage materials and surfaces when exposed to a source of ignition;
--acceptable resistance to fire has been achieved for all materials and items required to perform as a barrier to fire or which are required to perform some function when exposed to fire.

3. Classification of vehicle categories-- BS 6853:1999
There are two main classes of operating environment which are designated as follows
Category Ⅰ: Ⅰa and Ⅰb (underground)
CategoryⅡ: surface

Category Ⅰa: Substantial operating periods in single track tunnel with no side exits to a walkway and escape shafts, or sleeper vehicle which operate underground for significant periods, or trains that operate without staff.
Category Ⅰb: Substantial operating periods in a multi-track tunnel, or a tunnel with side exits to walkway and escape shafts or sleeper vehicles which do not operate underground for significant periods.
CategoryⅡ: Surface stock with no substantial operating periods in tunnels.

4. BS 6853:1999 The main fire test standards
BS 476-6 Method of test for fire propagation for products
BS 476-7 Method of test to determine the classification of the surface spread of flame of products
BS 5438 Methods of test for Flammability of textile fabrics
BS 4589-2 oxygen index Test
BS 4589-3 Temperature Index Test
BS 6853 Annex B Toxicity
BS 6853 Annex D Smoke Density Test
BS EN 60332-1-2 Vertical single Cable fire testing
BS EN 50306 Thin thickness of Cable fire testing
BS EN 50264 Standard thickness of Cable fire testing
BS EN 50305 Cable fire testing
BS ISO 5659-2 Toxicity Testing
NF X 70-100 Toxicity Testing
NF X 10-702 Smoke density
BS ISO 9239-1 Radiant panel test for floorings
BS EN 50266-2-4
BS EN 50266-2-5 Vertical bunch Cable fire testing ( diameter≥12mm)
Vertical bunch Cable fire testing ( diameter＜12mm)
BS EN 50305 sections 9.1.1 Vertical bunch Cable fire testing (6mm＜ diameter＜12mm)
BS EN 50305 sections 9.1.2 Vertical bunch Cable fire testing (diameter≤6mm)

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