ASTM D8073-16(R2021) pdf free download

ASTM D8073-16(R2021) pdf free download.Standard Test Method for Determination of Water Separation Characteristics of Aviation Turbine Fuel by Small Scale Water Separation Instrument
1. Scope
1.1 This test method covers a procedure to rate the ability of aviation turbine fuels to release entrained and emulsified water when passed through a water-coalescing filter. 1.2 Results are expressed as a Water Separation Index (WSI). 1.3 The values stated in SI units are to be regarded as standard. 1.3.1 Exception—Units in WSI are included. 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
5. Significance and Use
5.1 This test method provides an indication of the presence of surfactants in aviation fuel. Like Test Methods D2550, D3602, D3948, and D7224, this test method can detect carryover traces of refinery treating residues in fuel as pro- duced. In addition, these test methods can detect surface active substances added to or picked up by the fuel during handling from point of production to point of use. Certain additives can affect the WSI. Some of these substances affect the ability of filter separators to separate free water from the fuel. 5.2 The small scale water separation tester has a measure- ment range from 0.0 WSI to 100.0 WSI. N OTE 1—WSI values greater than 100.0 WSI can be caused by a reduction in the light transmittance (see A1.1.5) of the test specimen due to material that was removed during the testing process. 5.3 This test method was developed so refiners, fuel termi- nal operators, pipelines, and independent testing laboratory personnel can rapidly and precisely measure for the presence of surfactants, with a minimum of training, in a wide range of locations.
8. Sampling and Test Specimen Preparation
8.1 Unless otherwise agreed, samples shall be taken in accordance with Practice D4057 or Practice D4177. 8.2 Collect the sample directly in a suitable container of a minimum volume of 1000 mL. N OTE 2—The test method is known to be sensitive to trace contamination, for example from sampling containers or transfer glass- ware. For recommended sampling containers, refer to Practice D4306. 8.2.1 Epoxy-lined containers shall be visually inspected to ensure that the lining has not been damaged and that the containers are not dented. 8.3 Do not pre-filter the sample as the filter media can remove the surfactants that the test method is designed to detect. If the test fuel contains particulate, then allow such materials to settle out before sub sampling. 8.4 Special precautions concerning sampling techniques are discussed in Appendix X2. Wipe the container outlet thor- oughly with a clean, lint-free wipe. Take extreme care when pouring the sample directly into the test beaker to avoid contamination from the top of the container. 8.5 If the sample for test is not within the temperature range 18 °C to 29 °C, then allow the sample to stand until it is within this range.
10. Calibration, Verification and Standardization
10.1 Follow the manufacturer’s instructions for verification and calibration of the mechanical and electronic systems in the apparatus. 10.2 Verification: 10.2.1 Flow Rate—Verify that the flow rate is 25 mL ⁄min to 30 mL ⁄min, at least once every six months according to the manufacturer’s instructions. If the flow rate is not correct, follow the manufacturer’s instructions to diagnose and adjust. 10.2.2 Water Volume—Verify that the correct volume of dyed water (0.060 mL 6 0.005 mL) is dispensed following the manufacturer’s instructions. 10.2.3 Temperature Probe Calibration—Verify the tempera- ture at 20 °C following the manufacturer’s instructions. Reca- librate the temperature probe ifthe temperature measurement is not within 1 °C. 10.2.4 Overall Operation—Check the overall operation of the apparatus using a reference fluid containing 0.4 mL ⁄L of dispersing agent, and with reference fluid containing 0 mL ⁄L dispersing agent as required for quality control or at least every six months. Test the reference fluid following the procedure detailed in Section 11. Confirm that the value is between 75.0 WSI and 85.0 WSI for the 0.4 mL ⁄L dispersing agent and between 97.5 WSI and 100.0 WSI for the 0 mL ⁄L dispersing agent.