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Significance and Use
5.1 Some substances that are soluble or appear to be soluble in biodiesel (B100) at room temperature will, upon cooling to temperatures above the cloud point or standing at room temperature for extended periods, come out of solution. This phenomenon has been observed in both B100 and BXX blends. These substances can cause filter plugging. This method provides an accelerated means of assessing the presence of these substances in B100 and their propensity to plug filters.
1.1 This test method covers the determination by filtration time after cold soak of the suitability for a biodiesel (B100) blend stock that meets all other requirements of Specification D6751 and has a cloud point below 20°C (68°F) to provide adequate low temperature operability performance to at least the cloud point of the finished blend.
1.2 The formal precision of this test method is included in 13.1 on Precision.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D6217 Test Method for Particulate Contamination in Middle Distillate Fuels by Laboratory Filtration
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
D6751 Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels
ICS Number Code 75.160.20 (Liquid fuels)
UNSPSC Code 15101801(Biodiesel)
ASTM D7501-12a, Standard Test Method for Determination of Fuel Filter Blocking Potential of Biodiesel (B100) Blend Stock by Cold Soak Filtration Test (CSFT), ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top