BS EN ISO 2719:2002 pdf download – Determination of flash point — Pensky-Martens closed cup method

BS EN ISO 2719:2002 pdf download – Determination of flash point — Pensky-Martens closed cup method 9 Sample handling 9.1 Petroleum products 9.1.1 Subsampling Subsample at a temperature at least below the expected flash point. If an aliquot of the original sample is to be stored prior to testing, ensure that the container is filled to more than of its capacity (see note to 1 0.1 ). 9.1.2 Samples containing undissolved water If a sample contains undissolved water, decant an aliquot from the water prior to mixing. Flash point results can be affected by the presence of water. For certain fuel oils and lubricants, it may not always be possible to decant the sample from the free water. In such cases, the water should be separated from the aliquot physically, prior to mixing, or, if this is not possible, the material should be tested in accordance with ISO 3679 [6] . 9.1.3 Samples that are liquid at ambient temperature Mix samples by gentle manual shaking prior to the removal of the test portion, taking care to minimize the loss of volatile components, and proceed in accordance with clause 1 0. 9.1.4 Samples that are semi-solid or solid at ambient temperature Heat the sample in its container in a heating bath or oven (6.4) to a temperature of , or a higher temperature not exceeding below the expected flash point, whichever is the greater, for . If after the sample is still not completely liquefied, extend the preheating for further periods as required. Avoid overheating the sample, as this could lead to the loss of volatile components. After gentle agitation, proceed in accordance with clause 1 0. 9.2 Paints and varnishes Prepare the samples in accordance with ISO 1 51 3. 10 Procedure 10.1 General NOTE Results of flash point determinations may be affected if the sample volume falls below of the container capacity. Care should be taken when testing samples of residual fuel oil which contain significant amounts of water, as heating these samples may cause them to foam and eject from the test cup. 10.2 Procedure A 10.2.1 Using a barometer (6.3), record the ambient barometric pressure in the vicinity of the apparatus at the time of test. NOTE It is not necessary to correct the barometric pressure to , although some barometers are designed to make this correction automatically. 10.2.2 Fill the test cup (see 7.3) with the...