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BS 6853 fire test to railway components
> BS 6853: Code of practice for fire precautions in the design and construction of passenger carrying trains
BS 6853 Fire Test to railway components - Introduction
The standard has been extensively revised to assist railway vehicle builders in interpreting guidance from the Safety Regulatory Authority on fire performance. It is envisaged therefore that this standard will have a wider use than the previous edition and reflects the concern of the 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
BS 6853 Fire Test to railway components – Scope
This British Standard makes recommendations in respect of fire safety for the design and construction of railway vehicles comprising or forming part of passenger carrying trains. The recommendations are applicable to new vehicles and also to substantial changes to existing vehicles
The recommendations in this British Standard cover:
a) The reaction to fire of materials;
b) The use of fire resisting barriers;
c) General aspects of design for fire safety.
BS 6853 Fire Test to railway components – Test Method
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Table List
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Intended Use
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Required Test
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Method
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Remark
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BS 6853
Table 1
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Interior horizontal supine surface
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Surface spread of flame
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BS 476-7
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Critical radiant flux at extinguishment
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ISO 9239-1
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Smoke Density (flooring)
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BS 6853 Annex D
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Toxicity Test
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BS 6853 Annex B
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BS 6853
Table 2
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Interior vertical surface
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Fire propagation
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BS 476-6
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Surface spread of flame
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BS 476-7
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Smoke Density (Panel)
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BS 6853 Annex D
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Toxicity Test
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BS 6853 Annex B
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BS 6853
Table 3
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Interior horizontal prone surface
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Fire propagation
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BS 476-6
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Surface spread of flame
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BS 476-7
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Smoke Density (Panel)
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BS 6853 Annex D
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Toxicity Test
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BS 6853 Annex B
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BS 6853
Table 4
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Exterior horizontal supine surfaces
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Surface spread of flame
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BS 476-7
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Critical radiant flux at extinguishment
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ISO 9239-1
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Smoke Density (flooring)
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BS 6853 Annex D
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Toxicity Test
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BS 6853 Annex B
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BS 6853
Table 5
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Exterior vertical surfaces
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Surface spread of flame
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BS 476-7
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Smoke Density (Panel)
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BS 6853 Annex D
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Toxicity Test
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BS 6853 Annex B
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BS 6853
Table 6
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Exterior horizontal prone surface
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Surface spread of flame
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BS 476-7
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Smoke Density (Panel)
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BS 6853 Annex D
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Toxicity Test
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BS 6853 Annex B
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BS 6853
Table 7
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Interior minor use materials of mass 100g to 500g
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Flammability temperature
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BS ISO 4589-3
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Oxygen index
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BS ISO 4589-2
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Smoke density(Small scale)
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BS 6853 Annex D
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Toxicity test
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BS 6853 Annex B
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BS 6853
Table 8
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Exterior minor use materials of mass 400g to 2000g
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Flammability temperature
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BS ISO 4589-3
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Oxygen index
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BS ISO 4589-2
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Smoke density(Small scale)
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BS 6853 Annex D
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Toxicity test
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BS 6853 Annex B
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BS 6853
Table 9
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Seat trim
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Fire propagation
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BS 476-6
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Surface spread of flame
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BS 476-7
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Smoke density(seating)
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BS 6853 Annex D
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Toxicity test
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BS 6853 Annex B
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BS 6853
Table 10
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Seat shell (back and base)
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Fire propagation
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BS 476-6
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Surface spread of flame
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BS 476-7
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Smoke density(Panel)
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BS 6853 Annex D
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Toxicity test
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BS 6853 Annex B
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BS 6853
Table 11
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Textiles (free standing and lying)
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Burn length
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BS 5438
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Smoke density(Small scale)
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BS 6853 Annex D
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Toxicity test
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BS 6853 Annex B
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BS 6853
Table 12
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Mattresses
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Surface spread of flame
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BS 476-7
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Smoke Density (flooring)
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BS 6853 Annex D
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Toxicity Test
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BS 6853 Annex B
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BS 6853
Table 13
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Interior cables
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Cable Test
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BS 4066-3
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Smoke density(Cable)
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BS 6853 Annex D
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Toxicity Test
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BS 6853 Annex B
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BS 6853
Table 14
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Exterior Cables
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Cable Test
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BS 4066-3
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Smoke density(Cable)
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BS 6853 Annex D
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Toxicity Test
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BS 6853 Annex B
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BS 6853 Fire Test to railway components – Material under products Scope
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- Rubber Products (Seal and filter）
- Melamine foam for thermal insulation
- Sound insulation blanket
- Textile for curtain, seat backing
- Plastic Products (light shade, shell of cell)
- Flooring (glue and adhesive）
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- Cable
- Sound insulation blanket
- Electrical Device
- Fire-resistance paint
- Fire-redartant adhesive
- Seat (Sponge)
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BS 6853 Fire Test to railway components – Reference Standard
> BS 476-4, Fire tests on building materials and structures - Part 4: Non-combustibility test for materials.
> BS 476-6, Fire tests on building materials and structures - Part 6: Method of test for fire propagation for products.
> 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 476-15, Fire tests on building materials and structures - Part 15: Method for measuring the rate of heat release of products.
> BS 476-20, Fire tests on building materials and structures - Part 20: Method for determination of the fire resistance of elements of construction (general principles).
> BS 476-22, Fire tests on building materials and structures - Part 22: Methods for determination of the fire resistance of non-loadbearing elements of construction.
> BS 4066-3, Tests on electric cables under fire conditions - Part 3: Tests on bunched wires or cables.
> BS 5438:1989, Methods of test for flammability of textile fabrics when subjected to a small igniting flame applied to the face or bottom edge of vertically oriented specimens.
> BS 6387, Specification for performance requirements for cables required to maintain circuit integrity under fire conditions.
> BS ISO 4589-2, Plastics - Determination of burning behaviour by oxygen index - Part 2: Ambient-temperature test.
> BS EN ISO 4589-3:1996, Plastics - Determination of burning behaviour by oxygen index - Part 3: Elevated temperature test.
> BS ISO 5659-2, Plastics - Smoke generation - Part 2: Determination of specific optical density.
> BS ISO 9239-1, Reaction to fire tests - Horizontal surface spread of flame on floor-covering systems -Part 1: Flame spread using a radiant heat ignition source.
> NF X 70-1002), Fire tests - Analysis of pyrolysis and combustion gases - Tube furnace method.
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