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Significance and Use
Diesel fuel injection equipment has some reliance on lubricating properties of the diesel fuel. Shortened life of engine components, such as diesel fuel injection pumps and injectors, has sometimes been ascribed to lack of lubricity in a diesel fuel.
Pump Lubricity Value (PLV) test results generally rank fuel effects on diesel injection system pump component distress due to wear in the same order as Bosch, Lucas, Stanadyne, and Cummins in-house rig tests. In these fuel/hardware tests, boundary lubrication is believed to be a factor in the operation of the component.
The PLV is sensitive to contamination of the fluids and test materials and the temperature of the test. Lubricity evaluations are also sensitive to trace contaminants acquired during test fuel sampling and storage.
Test Methods D6078 and D6079 are two methods for evaluating diesel fuel lubricity. No absolute correlation has been developed between these two test methods, or between either of these methods and the PLV.
The PLV may be used to evaluate the relative effectiveness of a fluid for preventing wear under the prescribed test conditions.
This test method is designed to evaluate boundary lubrication properties. While viscosity effects on lubricity are not totally eliminated, they are minimized.
This test can indicate whether or not an additive will improve the lubricity of a poor lubricity fuel.
1.1 This test method covers evaluating the lubricity of diesel fuels using a pump rig test and Stanadyne Model DB4427-4782 pumps.
Note 1—Other pumps may be used if a correlation between pump performance factors and fuel lubricity has been developed.
1.2 This test method is applicable to any fuel used in diesel engines, including those which may contain a lubricity enhancing additive.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 and health practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are given in Section 7.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D329 Specification for Acetone
D362 Specification for Industrial Grade Toluene
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
D6078 Test Method for Evaluating Lubricity of Diesel Fuels by the Scuffing Load Ball-on-Cylinder Lubricity Evaluator (SLBOCLE)
D6079 Test Method for Evaluating Lubricity of Diesel Fuels by the High-Frequency Reciprocating Rig (HFRR)
ICS Number Code 75.160.20 (Liquid fuels)
UNSPSC Code 15101505(Diesel fuel)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D6898-03(2010), Standard Test Method for Evaluating Diesel Fuel Lubricity by an Injection Pump Rig, ASTM International, West Conshohocken, PA, 2010, www.astm.orgBack to Top