BS/EN 16329-2013 pdf download.Diesel and domestic heating fuels Determination of cold filter plugging point Linear cooling bath method.
7 Sampling
Unless otherwise specified in the commodity specification, samples shall be taken as described in EN ISO 3170 or EN ISO 3171, andlor in accOrdance with the requirements of national standards or regulations for the sampling of the product under test.
8 Preparation of the test sample
lithe sample contains undissoived water and/or particulate matter, then pre-heat the sample at 45 °C foi 30 mm and then aHow the sample to cool down to ambient Iaboratoiy temperature.
lithe sample no longer contains undissolved water and/or particulate matter, then testing shall proceed to Clause 9.
However, if the sample still contains undissolved water and/or particulate matter, then filter approximately
50 ml of the sample at ambient temperature. but in any case not less than 15 °C, through a dry filter paper
(5.3).
NOTE To investigate product complaints and to erase the thermal history of the sample due to cold storage conditions, the sample can be preheated as outlined above.
9 Preparation of apparatus
IMPORTANT — The correct functionIng of the apparatus should be verified preferably at least twice a year and, where possible, using certIfied reference materials. The apparatus should also be checked more frequently (e.g. weekly) using an In-house secondary reference material, such as fuel of known CFPP value. Deviations outside established statistical quality control limits should be investigated and be resolved. The manufacturer’s Instruction manual should provide guidance on ensuring that the equipment is correctly set up and calibrated.
Prepare the equipment according to the manufacturers instructions. Before each test, wash the filter unit (6.6.2), the test jar (6.2), the pipette (6.6.1) arid the thermometer (6.91) with hydrocarbon solvent (5.1), then rinse with light hydrocarbon solvent (see 5.2) and dry in a stream of filtered air. Check the cleanliness and dryness of all elements. Including the jacket (6.3). Examine the wire mesh and the joints for damage: if necessary renew them. Check that the screw cap Is tight enough to prevent leakage.
It is strongly recommended to inspect the filter holder on a regular basis and clean it, as needed, depending on the type of samples.
10 Procedure
10.1 Position the spacer (6.4) in the jacket (6.3). The jacket shall be free from moisture/ice: this shall be
checked immediately before the positioning.
10.2 Pour the test sample (see Clause 8) into the test jar to the mark (45 ml).
10.3 Check that the cooling bath with the positioned jacket is at a temperature between 18 C to 35 C (the jacket may be permanently fixed to the cooling bath).
10.4 Place the test jar with its stopper (6.5), and the pipette with filter unit (6.6) and suitable thermometer (6.9.1) into the jacket.
Ensure that the bottom of the filter unit and the thermometer both rest on the bottom of the test jar. Check that the thermometer does not touch the wall of the test jar or the filter unit.
BS EN 16329:2013
EN 16329:2013 (E)
10.5 t..onnect me pipette to trio valve unit.
10.6 Start the test immediately according to the manufacturer’s instructions. The temperature of the cooling
bath is lowered within 5 mm to —10 °C. Subsequently, the temperature of the cooling bath is further lowered at
a rate of 30 K/h until the CFPP is reached (see Figure 6).
10.7 When the temperature of the test portion reaches an integer value, the first aspiration cycle is started by connecting the pipette via the valve unit to the vacuum regulator, causing the test portion to be drawn into the ppette. When the pipette is tilted with (20 ± 0,2) ml of tested fuel, it is vented via the valve unit to the atmosphere. thus allowing the test portion to return to the test jar.
10.8 The aspiration cycle is repeated for each 1 °C decrease of the test samples temperature until the temperature is reached at which the pipette is not tilled with (20 ± 0.2) ml within 60 s. Record the temperature at which this last filtration was commenced as the CFPP (see also Clause 12).
NOTE A small minority of samples may exhibit anomalous aspiration behaviour, which can be detected by examining the aspiration times recorded in the test printout for signs of an unexpected reduction in the time to fill the pipette, after which the aspiration time again continues to increase progressively, until the failure limit of 60 s is reached.BS/EN 16329-2013 pdf download.