Work Item
ASTM WK65353
Revision of D975-18 Standard Specification for Diesel Fuel Oils
Rationale
This ballot item would add as a reference, D7261 Standard Test Method for Determining Water Separation Characteristics of Diesel Fuels by Portable Separometer to Appendix X8.4.3.(Nonmandatory Information) of D975 Standard Specification for Diesel Fuel Oils. The revision would inform readers of a test to rate the ability of diesel fuels to release entrained water when passed through coalescing media. This characteristic provides an indication of the presence and strength of surfactants in diesel fuels. Surfactants are known contaminants that reduce the interfacial tension of liquids and inhibit the coalescing process. Surfactant contamination can occur at the point of manufacture and/or at points downstream. A concentration of surfactants in diesel fuel can coat, plug, and disarm coalescer filters, promote the formation of coagulants and carboxylic acids that adversely affect injector rails, combustion chambers and overall fuel performance, and in general adversely affect diesel engines, related components, and distribution system components. D7261 readings will also be adversely affected by concentrations of ethanol, algae, bacteria, or fungi in diesel fuel. Further support on the hazards of surfactants in fuel can be found in ASTM D1655 Standard Specification for Aviation Turbine Fuels. Water separability is a mandatory contaminant test in this specification. Supporting data on D7261 filed with ASTM include Research Reports 1876 and 1877 and may be obtained from Lisa Drennen at ldrennen@ASTM.org.
Work Item Status
Date Initiated: 10-11-2018
Technical Contact: Ryan Case
Item: 002
Ballot: D02.E0 (18-09)
Status: Will Reballot Item
Item: 001
Ballot: D02.E0 (19-06)
Status: Will Reballot Item
Item: 001
Ballot: D02.E0 (21-01)
Status: Will Reballot Item
Item: 001
Ballot: D02.E0 (21-02)
Status: Will Reballot Item
Item: 002
Ballot: D02.E0 (21-02)
Status: Will Reballot Item