British Standard BS6853/BS 6853:1999
British Standard BS6853/BS 6853:1999
1. Standard-- BS6853/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-- BS6853/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-- BS6853/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. according to end-use, materials and product testing in according with the following standard:
|
Test item |
End-Use |
Required Test |
Test method |
Specimen required |
|
BS 6853:1999 Table 1
|
Interior horizontal supine surfaces |
Surface spread of flame or Critical radiant flux at extinguishment |
BS 476-7 or
BS ISO 9239-1 |
885mm*267mm
1050mm*230mm |
|
Smoke density (Flooring test) |
BS 6853:1999 Annex D |
600mm*600mm |
||
|
Toxicity test |
BS 6853:1999 Annex B |
75mm*75mm |
||
|
BS 6853:1999 Table 2 |
Interior vertical surface |
Fire propagation |
BS 476-6 |
225mm*225mm |
|
Surface spread of flame |
BS 476-7 |
885mm*267mm
|
||
|
Smoke density (Panel test) |
BS 6853:1999 Annex D |
1000mm*500mm
|
||
|
Toxicity test |
BS 6853:1999 Annex B |
75mm*75mm |
||
|
BS 6853:1999 Table 3 |
Interior horizontal prone surfaces |
Fire propagation |
BS 476-6 |
225mm*225mm |
|
Surface spread of flame |
BS 476-7 |
885mm*267mm
|
||
|
Smoke density (Panel test) |
BS 6853:1999 Annex D |
1000mm*500mm
|
||
|
Toxicity test |
BS 6853 Annex B |
75mm*75mm |
||
|
BS 6853:1999 Table 4 |
Exterior horizontal supine surfaces |
Surface spread of flame or Critical radiant flux at extinguishment |
BS 476-7 or
BS ISO 9239-1 |
885mm*267mm
1050mm*230mm |
|
Smoke density (Flooring test) |
BS 6853 Annex D |
600mm*600mm |
||
|
Toxicity test |
BS 6853:1999 Annex B |
75mm*75mm |
||
|
BS 6853:1999 Table 5 |
Exterior vertical surfaces |
Surface spread of flame |
BS 476-7 |
885mm*267mm
|
|
Smoke density (Panel test) |
BS 6853:1999 Annex D |
1000mm*500mm
|
||
|
Toxicity test |
BS 6853:1999 Annex B |
75mm*75mm |
||
|
BS 6853:1999 Table 6 |
Exterior horizontal prone surfaces |
Surface spread of flame |
BS 476-7 |
885mm*267mm
|
|
Smoke density (Panel test) |
BS 6853:1999 Annex D |
1000mm*500mm
|
||
|
Toxicity test |
BS 6853:1999 Annex B |
75mm*75mm |
||
|
BS 6853:1999 Table 7 |
Interior minor use materials of mass 100g to 500g |
Oxygen index testing or Temperature index testing |
BS ISO 4589-2 BS ISO 4589-3 |
According to sample |
|
Smoke density (small scale test) |
BS 6853:1999 Annex D |
140mm*60mm*3mm |
||
|
Toxicity test |
BS 6853:1999 Annex B |
100g |
||
|
BS 6853:1999 Table 8 |
Exterior minor use materials of mass 400g to 2000g |
Oxygen index testing or Temperature index testing |
BS ISO 4589-2 BS ISO 4589-3 |
On request |
|
Smoke density (small scale test) |
BS 6853:1999 Annex D |
140mm*60mm*3mm |
||
|
Toxicity test |
BS 6853:1999 Annex B |
100g |
||
|
BS 6853:1999 Table 9 |
Seat trim |
Back： |
||
|
Fire propagation |
BS 476-6 |
225mm*225mm |
||
|
Surface spread of flame |
BS 476-7 |
885mm*267mm
|
||
|
Toxicity test |
BS 6853:1999 Annex B |
75mm*75mm |
||
|
Base： |
||||
|
Surface spread of flame |
BS 476-7 |
885mm*267mm
|
||
|
Toxicity test |
BS 6853:1999 Annex B |
75mm*75mm |
||
|
Assembly： |
||||
|
Smoke density (Seating test) |
BS 6853:1999 Annex D |
400mm*400mm |
||
|
BS 6853:1999 Table 10 |
Seat shell（back and base） |
Fire propagation |
BS 476-6 |
225mm*225mm |
|
Surface spread of flame |
BS 476-7 |
885mm*267mm
|
||
|
Smoke density (Panel test) |
BS 6853:1999 Annex D |
1000mm*500mm
|
||
|
Toxicity test |
BS 6853:1999 Annex B |
75mm*75mm |
||
|
BS 6853:1999 Table 11 |
Textiles（free standing and lying ）(HS,HP, V surfaces） |
Burn length |
BS 5438 |
200mm*160mm |
|
Smoke density（small scale test） |
BS 6853:1999 Annex D |
140mm*60mm*3mm |
||
|
Toxicity test |
BS 6853:1999 Annex B |
100g |
||
|
BS 6853:1999 Table 12 |
Mattresses |
Surface spread of flame |
BS 476-7 或
|
885mm*267mm
|
|
Smoke density (Flooring test） |
BS 6853:1999 Annex D |
600mm*600mm |
||
|
Toxicity test |
BS 6853:1999 Annex B |
75mm*75mm |
||
|
BS 6853:1999 Table 13 |
Interior cable |
Burn length |
BS 4066-3 |
On request |
|
Smoke density (Cable test） |
BS 6853:1999 Annex D |
On request |
||
|
Toxicity test |
BS 6853:1999 Annex B |
On request |
||
|
BS 6853:1999 Table 14 |
Exterior cable |
Burn length |
BS 4066-3 |
On request |
|
Smoke density (Cable test） |
BS 6853:1999 Annex D |
On request |
||
|
Toxicity test |
BS 6853:1999 Annex B |
On request |
||
5. BS6853/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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