This document specifies a test method using the high-frequency reciprocating rig (HFRR), for assessing the lubricating property of diesel fuels, including those fuels which could contain a lubricity-enhancing additive. It defines two methods for measurement of the wear scar; Method "A" — Digital camera, and Method "B" — Visual observation. This test method applies to fuels used in diesel engines. NOTE It is not known if this test method will predict the performance of all additive/fuel combinations, including paraffinic fuels for which no additional correlation testing has been performed. Nevertheless, no data has been presented to suggest that such fuels are not within scope.
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Sampling
8 Preparation and calibration
8.1 Preparation of apparatus
8.2 Calibration and correction
9 Test procedure
10 Measurement of wear scar
10.1 General
10.2 Method “A” — Digital camera
10.3 Method “B” — Visual observation
11 Test results
12 Precision
12.1 General
12.2 Repeatability, r
12.3 Reproducibility, R
13 Test report
Annex A Measurement of HFRR wear scars (informative)
ASTM D 4306:2015 Standard Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
ISO 3170:2004 Petroleum liquids -- Manual sampling
ISO 3171:1988 Petroleum liquids -- Automatic pipeline sampling
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ISO 3170:2004 Petroleum liquids -- Manual sampling
ISO 3171:1988 Petroleum liquids -- Automatic pipeline sampling
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