ASTM D6426-22 PDF
Standard Test Method for Determining Filterability of Middle Distillate Fuel Oils
Standard Test Method for Determining Filterability of Middle Distillate Fuel Oils
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 7
- Дата публикации:
- 1 декабря 2022 г.
- Издание:
- D6426
- ICS:
- 27.060.10
SIGNIFICANCE AND USE 5.1 This test method is intended for use in the laboratory or field in evaluating distillate fuel cleanliness. 5.2 A change in filtration performance after storage, pretreatment, or commingling can be indicative of changes in fuel condition. 5.3 Relative filterability of fuels may vary depending on filter porosity and structure and may not always correlate with results from this test method. 5.4 Causes of poor filterability in industrial/refinery filters include fuel degradation products, contaminants picked up during storage or transfer, incompatibility of commingled fuels, or interaction of the fuel with the filter media. Any of these could correlate with orifice or filter system plugging, or both. SCOPE 1.1 This test method covers a procedure for determining the filterability of distillate fuel oils within the viscosity range from 1.70 mm2/s to 6.20 mm2/s (cSt) at 40 °C. Note 1: ASTM specification fuels falling within the scope of this test method are Specification D396 Grade No. 2, Specification D975 Grade No. 2-D, and Specification D2880 Grade No. 2-GT. Note 2: The test method has been used with lower viscosity middle distillate fuels such as Specification D396 Grade No. 1, Specification D975 Grade No. 1-D, and Specification D2880 Grade No. 1-GT, but the precision has not been studied and therefore the stated precision has not been validated for these grades. 1.2 This test method is not applicable to fuels that contain undissolved water. 1.3 The values stated in SI units are to be regarded as standard. 1.3.1 Non-SI units, specifically U.S. customary units such as temperature in degrees Fahrenheit and pressure in pounds per square inch gauge (psig), are included for information. 1.4 This 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. 1.5 This 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.
Abstract
Overview
ASTM D6426-22: Standard Test Method for Determining Filterability of Middle Distillate Fuel Oils provides a consistent laboratory or field procedure to evaluate the filterability and cleanliness of middle distillate fuel oils. Filterability testing is vital for understanding how distillate fuels like diesel, home heating oils, and certain gas turbine fuel oils pass through filters during storage, distribution, or use. The method focuses on detecting particulates or contaminants that could cause plugging of fuel system filters, ensuring product quality and reliable engine performance.
The test covers distillate fuels within a viscosity range of 1.70 mm²/s to 6.20 mm²/s (cSt) at 40 °C, such as those defined in ASTM D396 (Grade No. 2), ASTM D975 (Grade No. 2-D), and ASTM D2880 (Grade No. 2-GT). The standard also serves as an indicator of how factors like storage, pretreatment, or commingling can impact fuel condition and filtration characteristics. It is not intended for use with fuels that contain undissolved water.
Key Topics
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Filterability Measurement: Evaluation is performed by passing fuel through a standard filter medium at a fixed flow rate, monitoring pressure drop and volume. Results are expressed via a filterability quality factor (F-QF), reflecting the fuel’s particulate load and likelihood of filter plugging.
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Fuel Quality Assessment: This method helps detect degradation products, incompatibilities, or contamination-common causes for poor filterability-that might have been introduced during storage or transfer.
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Applicability: The standard focuses on middle distillate fuels, especially those intended for diesel engines and gas turbines, ensuring suitability by specifying acceptable viscosity ranges and excluding samples with undissolved water.
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Sampling and Reporting: Proper sampling per referenced ASTM standards (D4057, D4177), temperature control, and precise reporting of F-QF, pressure, volume, and any presence of free water are essential for reproducibility and comparison.
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Precision and Repeatability: The standard defines criteria for repeatability and reproducibility, ensuring reliable comparison between laboratories when procedures are followed strictly.
Applications
ASTM D6426-22 is widely used in fuel quality assurance across various sectors, including:
- Fuel Storage Facilities: To regularly evaluate bulk distillate fuel oils for particulates and degradation before distribution.
- Refineries: For product quality assessment and monitoring the impact of blending or commingling different fuel stocks.
- Transport and Distribution: Checking for contamination or incompatibility that may develop during fuel transfer or storage.
- Power Generation and Industrial Users: Verifying that fuels destined for engines or turbines meet filterability requirements, minimizing maintenance and operational disruptions.
- Regulatory and Compliance Testing: Ensuring product compliance with relevant fuel specifications and supporting shipment or trade documentation.
This test method supports safe operation and optimal performance by helping prevent filter plugging and associated issues in fuel handling systems.
Related Standards
- ASTM D396 - Specification for Fuel Oils
- ASTM D975 - Specification for Diesel Fuel
- ASTM D2880 - Specification for Gas Turbine Fuel Oils
- ASTM D4057 - Practice for Manual Sampling of Petroleum and Petroleum Products
- ASTM D4175 - Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
- ASTM D4176 - Test Method for Free Water and Particulate Contamination in Distillate Fuels
- ASTM D4177 - Practice for Automatic Sampling of Petroleum and Petroleum Products
- ASTM D4860 - Test Method for Free Water and Particulate Contamination in Middle Distillate Fuels
These related standards provide additional guidance for sampling procedures, terminology, and quality assessment of petroleum-derived fuels.
Keywords: filterability, middle distillate fuels, diesel fuel, fuel cleanliness, particulates, fuel oils, ASTM D6426, fuel storage, fuel system plugging, filtration testing, distillate fuel specification.
Технические детали
- Технический комитет
- D02 - Petroleum Products, Liquid Fuels, and Lubricants
- SKU
- ASTM D6426-22
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