NON-COMBUSTIBILITY TEST OF MATERIALS WITH METHODS ACCORDING TO PN-EN ISO 1182 AND THE IMO 2010 FTP CODE PART 1
Principle of the method.
Of testing the non-combustibility of materials with method according to ISO 1182 in the electric tube furnace about inside diameter 75 mm is being carried out. Before the test one should heat the furnace up to stabilized temperature 750+/-5oC.
Stand for testing the non-combustibility of materials.
They during test determine:
- furnace temperature in the time function,
- temperature of the sample surface in the time function,
- inside temperature of the sample in the time function,
- time of the ignition of the sample,
- finish time of burning samples,
- loss in weight of the sample.
The test is being led to the moment of getting the final thermal balance. They assume that the state of the final thermal balance was achieved, when the speed of the changes of temperatures: furnace, surface of the sample and inside of the sample isn't crossing 0,2oC/min.
They based on get results of measurements determine:
- duration of sustained flaming,
- the maximum increase of furnace temperature,
- the maximum increase of sample surface temperature,
- the maximum increase of sample inside temperature,
- relative loss in weight of the sample.
Achieved results constitute the base of material for classification studied
The test specimen shall be taken from a sample which is sufficiently large to be representative of the product. The test specimens shall be cylindrical and each shall have a volume of (76 ± 8) cm3 , a diameter of 45 mm and a height of (50 ± 3) mm. If the thickness of the material is different from (50 ± 3) mm, specimens of the height of (50 ± 3) mm shall be made by using a sufficient number of layers of the material or by adjustment of the material thickness. The layers shall occupy a horizontal position in the specimen holder and shall be held together firmly, without significant compression, by means of two fine steel wires, of maximum diameter 0,5 mm, to prevent air gaps between layers. The specimens of loose fill materials shall be representative in appearance, density, etc. as in use. One should prepare five samples for test.
Applying research methods:
- shipbuilding (requirements according to IMO 2010 FTP Code Part 1),
- civil engineering (requirements according to PN-EN 13501 for European Classification System: A1, A1fl, A2 and A2fl)
- railways (requirements according to PN-EN 45545-2).