BS EN 116:2015 pdf download.Diesel and domestic heating fuels – Determination of cold filter plugging point – Stepwise cooling bath method.
BS EN 116 specifies a method for the determination of the cold filter plugging point (CFPP) of diesel and domestic heating fuels (see 3.1) using automated test equipment. Manual test equipment may be used, but for referee purposes only automated test equipment is allowed.
BS EN 116 is applicable to fatty-acid methyl esters (FAME) and to distillate fuels as well as paraffinic diesel fuels, including those containing FAME, flow-improvers or other additives, intended for use in diesel engines and domestic heating installations.
The results obtained from the method specified in this European Standard are suitable for estimating the lowest temperature at which a fuel will give trouble-free flow in the fuel system.
NOTE In the case of diesel fuels the results are usually close to the temperature of failure in service except when the fuel system contains, for example, a paper filter installed in a location exposed to the weather or if the filter plugging temperature is more than 12 °C below the cloud point of the fuel. Domestic heating installations are usually less critical and often operate satisfactorily at temperatures somewhat lower than those indicated by the test results.
The difference in results obtained from the sample “as received” and after heat treatment at 45°C for 30 mm before the filtration may be used to investigate complaints of unsatisfactory performance under low temperature conditions.
4 Principle
A test portion of the fuel is cooled under trie specified conditions and is drawn at intervals of 1 “C into a pipette under a controlled vacuum of 2 kPa through a standardized wire mesh filter. The procedure is repeated, as the fuel continues to cool, for each I °C below the first test temperature. Testing is continued until the amount of wax crystals which have separated out of solution is sufficient to stop or slow down the flow so that the time taken to fill the pipette exceeds 60 s or the fuel fails to return completely to the test jar before the fuel has cooled by a further 1 °C.
The indicated temperature at which the last filtration was commenced is recorded as the cold filter plugging point (CFPP).
5 Reagents and materials
5.1 Hydrocarbon solvents, technical grade, e.g. Heptane.
5.2 Light hydrocarbon solvent, technical grade, e.g. Isopentane.
5.3 Lintless filter paper, with particle retention of (5 ± 1) pm.
5.4 Certified reference materials.
Certified reference materials may be obtained from the European Commission’s Institute for Reference
Materials and Measurements (IRMM), Retieseweg 111, B-2440 Brussels.
6 Apparatus
The equipment, as detailed in 6.1 to 6.11, shall be arranged as shown in Figure 1. Unless otherwise stated, all dimensions in the figures are given in mm.
IMPORTANT — Parts of the apparatus made of copper, zinc or brass can interact with blo-components like fatty acid methyl ester (FAME). Care shall be taken and parts made from alternative materials are available.BS EN 116 pdf download.