BS EN ISO 2719:2002 pdf download
BS EN ISO 2719:2002 pdf download.Determination of flash point Pens ky-M artens closed cup method.
Light the test flame and adjust to a diameter of 3 mm 104 mm. or switch on the alternative ignition source. Light the heater flame or switch on the electric heater and supply heat at such a rate that the temperature of the test portion as indicated by the thermometer Increases at 5 C/mm to 6 C/mm, and maintain this heating rate throughout the test. Stir the test portion at a rate of 90 r/min to 120 r/min. stirring in a downward direction.
10.2.3 When the test portion is expected to have a flash poInt 0(110cC or below, make the first application of the ignition source wI-men the temperature of the test portion is 23 “C ± 5 °C below the expected ftash point, and thereafter at IC temperature intervals. Cease stirring and apply the ignition source by operating the mechanism on the cover, which controls the shutter and ignition source, so that the source is lowered into the vapour space of the test cup in 0.5 s. left in Its lowered position for I s, and quiddy raised to its high position.
10.2.4 When the test portion is expected to have a flash point of above 110°C make the first application of the ignition source when the temperature of the test portion is 23 UC ± 5 “C below the expected flash point, and thereafter at temperatures which are a multiple of 2 0C Cease stirring and apply the ignition source by operating the mechanism on the cover, which controls the shutter and ignition source, so that the source is lowered into the vapour space of the test cup in 0,5s. left In its lowered position for 1 s, and qumddy raised to its high position.
10.2.5 When testing a material of unknown flash point, conduct a preliminary test at a suitable starting temperature.
Make the first ignition-source application at 5°C above the starling temperature and follow the procedure given in
10.2.3 or 10.2.4, as applicable.
10.2.6 Record, as the observed flash point, the temperature of the test portion read on the thermometer at the time when the ignition-source application causes a distinct flash In the interior of the test cup. Do not confuse the true flash point with the bluish halo that sometimes surrounds the ignition source at applications preceding the actual flash point.
10.2.7 When the temperature at which the flash point is observed is less than 18 °C or greater than 28 “C, from the temperature of the first application of the ignition source, the result is not valid. Repeat the test using a fresh test portion, adjusting the temperature of the first application of the ignition source until a vabd determination is obtained. that is where the flash point is 18 JC to 28 “C above the temperature of the first application of the ignition source.
10.3 Procedure B
10.3.1 Using a barometer (6.3). record the ambient barometric pressure in the vicmmty of the apparatus at the time of test (see the note to 102.1).
10.3.2 Fill the test cup (see 7.3) with the test portion to the level indicated by the filling mark. Place the lid on the test cup and put it In the heating chamber. Ensure that the locating or loddng device is properly engaged and insert the thermometer (6.2). Light the test flame and adust to a diameter of 3 mm to 4 mm, or switch on the alternative ignition source. Light the heater flame or switch on the electric heater and supply heat at such a rate that the temperature ol the test portion as indicated by the thermometer increases at 1,0 “C/mm to 1,5 “C/mm. and maintain this heating rate throughout the test. Stir the test portion at a rate of 250 rimin ± 10 rimin, stirring in a downward direction.
10.3.3 With the exception of the requirements given in 10.3.2 for rate of heating and stirnng. proceed in accordance with 102.3 to 102.7.
11 Calculation
11.1 Conversion of barometric pressure reading
If the barometric pressure reading is measured in a unit other than kilopascals. convert to kilopascals using one of the following expressions:
Reading in hPa x 0,1 = kPa
Reading in ritar x 0,1 = kPa
Reading in mmHg x 0,1333 = kPa.
