Diesel fuel filter plugging point testing

Diesel Cold How Test Development Group. 1991. Method for determining the simulated filter plugging point of middle distillate fuels. Abingdon, England. 

Standard test method for cold filter plugging point of diesel and heating fuels, ASTM Standard ASTM D 6371, ASTM International, West Conshohocken, PA, 2005. 

An analogous property, the cold filter plugging point is suitable for estimating the lowest temperature at which diesel fuel will give trouble-free flow in certain fuel systems (ASTM D-6371, IP 309). In this test, either manual or automated apparatus may be used, which is cooled under specified conditions and, at intervals of 1°C, sample is drawn into a pipette under a controlled vacuum through a standardized wire mesh filter. As the sample continues to cool, the procedure is repeated for each 1°C below the first... 

P. Claudy, J.M. Letoffe et al., Diesel fuels determination of onset crystallization temperature, pour point and filter plugging point by differential scanning calorimetry. Correlation with standard test methods. Fuel 65,861-864 (1986)... 

CEN (European Conunittee fa- Standardization), Brussels, Belgium. Various Standards EN 116 Diesel and Domestic Heating Fuels - Determination of Cold Filter Plugging Point. EN 14112 Fat and Oil Derivatives. Fatty Acid Methyl Esters (FAME). Determination of Oxidation Stability (Accelerated Oxidation Test) EN 14213 Heating Fuels. Fatty Add Methyl Esters (FAME). Requirements and Test Methods EN 14214 Automotive Fuels - Fatty Add Methyl Esters (FAME) fa- Diesel Engines - Requirements and Test Methods, EN 15751 Automotive Fuels. Fatty Add Methyl Ester (FAME) Fuel and Blends with Diesel Fuel. Determination of Oxidation Stability by Accelerated Oxidation Method. CEN, Brussels, Belgium. 

The solubility of linear alkanes present in diesel quickly decreases with temperature. The temperature at which the first crystals appear is called the cloud point and is one of the most important specifications for fuels concerning their low temperature behaviour. The utilization of a fuel is restricted to temperatures above their cloud point. Cloud point measures the temperature at which the wax crystals form a haze. Below the cloud point, the presence of crystals in suspension impairs the flow, plugging fuel filters. Immediately below the cloud point the fluid stops flowing, reaching what is known as pom point. The CFPP test measmes the highest temperature at which wax separating out of a sample... 

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