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BS 6853 Fire Test to Railway Components - British Standard

Zoom  Zoom Issue Date:2011-06-05   Source:Firetc   Author:Firetc   Browse:29584
BS 6853, 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 e
 
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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
Table List
Intended Use
Required Test
Method
Remark
BS 6853
Table 1
Interior horizontal supine surface
Surface spread of flame
BS 476-7
 
Critical radiant flux at extinguishment
ISO 9239-1
 
Smoke Density (flooring)
BS 6853 Annex D
 
Toxicity Test
BS 6853 Annex B
 
BS 6853
Table 2
Interior vertical surface
Fire propagation
BS 476-6
 
Surface spread of flame
BS 476-7
 
Smoke Density (Panel)
BS 6853 Annex D
 
Toxicity Test
BS 6853 Annex B
 
BS 6853
Table 3
Interior horizontal prone surface
Fire propagation
BS 476-6
 
Surface spread of flame
BS 476-7
 
Smoke Density (Panel)
BS 6853 Annex D
 
Toxicity Test
BS 6853 Annex B
 
BS 6853
Table 4
Exterior horizontal supine surfaces
Surface spread of flame
BS 476-7
 
Critical radiant flux at extinguishment
ISO 9239-1
 
Smoke Density (flooring)
BS 6853 Annex D
 
Toxicity Test
BS 6853 Annex B
 
BS 6853
Table 5
Exterior vertical surfaces
Surface spread of flame
BS 476-7
 
Smoke Density (Panel)
BS 6853 Annex D
 
Toxicity Test
BS 6853 Annex B
 
BS 6853
Table 6
Exterior horizontal prone surface
Surface spread of flame
BS 476-7
 
Smoke Density (Panel)
BS 6853 Annex D
 
Toxicity Test
BS 6853 Annex B
 
BS 6853
Table 7
Interior minor use materials of mass 100g to 500g
Flammability temperature
BS ISO 4589-3
 
Oxygen index
BS ISO 4589-2
 
Smoke density(Small scale)
BS 6853 Annex D
 
Toxicity test
BS 6853 Annex B
 
BS 6853
Table 8
Exterior minor use materials of mass 400g to 2000g
Flammability temperature
BS ISO 4589-3
 
Oxygen index
BS ISO 4589-2
 
Smoke density(Small scale)
BS 6853 Annex D
 
Toxicity test
BS 6853 Annex B
 
BS 6853
Table 9
Seat trim
Fire propagation
BS 476-6
 
Surface spread of flame
BS 476-7
 
Smoke density(seating)
BS 6853 Annex D
 
Toxicity test
BS 6853 Annex B
 
BS 6853
Table 10
Seat shell (back and base)
Fire propagation
BS 476-6
 
Surface spread of flame
BS 476-7
 
Smoke density(Panel)
BS 6853 Annex D
 
Toxicity test
BS 6853 Annex B
 
BS 6853
Table 11
Textiles (free standing and lying)
Burn length
BS 5438
 
Smoke density(Small scale)
BS 6853 Annex D
 
Toxicity test
BS 6853 Annex B
 
BS 6853
Table 12
Mattresses
Surface spread of flame
BS 476-7
 
Smoke Density (flooring)
BS 6853 Annex D
 
Toxicity Test
BS 6853 Annex B
 
BS 6853
Table 13
Interior cables
Cable Test
BS 4066-3
 
Smoke density(Cable)
BS 6853 Annex D
 
Toxicity Test
BS 6853 Annex B
 
BS 6853
Table 14
Exterior Cables
Cable Test
BS 4066-3
 
Smoke density(Cable)
BS 6853 Annex D
 
Toxicity Test
BS 6853 Annex B
 

BS 6853 Fire Test to railway components – Material under products Scope
- 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
- Cable
- Sound insulation blanket
- Electrical Device
- Fire-resistance paint
- Fire-redartant adhesive
- Seat (Sponge)
 
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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