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Standard Test Method for Sizing and Counting Particles in Light and Middle Distillate Fuels, by Automatic Particle Counter
NORMA vydaná dňa 1.4.2022
Označenie normy: ASTM D7619-22
Dátum vydania normy: 1.4.2022
Kód tovaru: NS-1058402
Počet strán: 11
Približná hmotnosť: 33 g (0.07 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
automatic particle counting, automotive diesel, biodiesel, fuel cleanliness, gas oil, gasoline, kerosine, marine diesel,, ICS Number Code 75.160.20 (Liquid fuels)
|Significance and Use|
5.1This test method is intended for use in the laboratory or in the field for evaluating the cleanliness of distillate fuels, and liquid bio fuels. It is not applicable to on or in-line applications.
5.2This test method offers advantage over traditional filtration methods in that it is a precise rapid test, and advantage over visual methods as it is not subjective.
5.3An increase in particle counts can indicate a change in the fuel condition caused by storage or transfer for example.
5.4High levels of particles can cause filter blockages and have a serious impact on the life of pumps, injectors, pistons and other moving parts. Knowledge of particle size in relation to the metallurgy can provide vital information especially if the hardness of particles is also known from other sources.
5.5This test method specifies a minimum requirement for reporting measurements in particle size bands (see ). Some specific applications may require measurements in other particle size bands.
5.6Obtaining a representative sample and following the recommended sample and test specimen preparation procedures and timescales is particularly important with particle counting methods. (See Sections , , and .)
5.7This test method can also be used to estimate the total particulate counts excluding free water droplets in aviation turbine fuels by a chemical pretreatment of the fuel. See .
1.1This test method uses a specific automatic particle counter (APC) to count and measure the size of dispersed dirt particles, water droplets and other particles, in light and middle distillate fuel, and bio fuels such as biodiesel and biodiesel blends, in the overall range from 4m(c) to 100m(c) and in the size bands ?4m(c), ?6m(c), and ?14m(c).
Note 1:ASTM and military specification fuels falling within the scope of this test method include Specifications: grades 1D and 2D, , , (see ), , , distillate grades of and , MIL-DTL-83133, and MIL-DTL-16884.
Note 2:For the purposes of this test method, water droplets are counted as particles, and agglomerated particles are detected and counted as a single larger particle. Dirt includes biological particles. Although the projected area of a particle is measured, this is expressed as the diameter of a sphere for the purposes of this test method.
Note 3:The notation (c), used with particle sizes, is used to denote that the apparatus has been calibrated in accordance with ISO 11171. Strictly this only applies to particles up to 50m.
Note 4:This test method may be used for particle sizes bands up to 100m(c), however the precision has only been determined for the size bands ?4m(c), ?6m(c), and ?14m(c). All measurements are per millilitre.
1.2The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
|2. Referenced Documents|
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