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Significance and Use
5.1 The cloud point of petroleum products and biodiesel fuels is an index of the lowest temperature of their utility for certain applications. Wax crystals of sufficient quantity can plug filters used in some fuel systems.
5.2 Petroleum blending operations require precise measurement of the cloud point.
5.3 This test method can determine the temperature of the test specimen at which wax crystals have formed sufficiently to be observed as a cloud with a resolution of 0.1 °C.
5.4 This test method provides results that, when corrected for bias and rounded to the next lower integer (see ), have been found equivalent to Test Method .
5.5 This test method determines the cloud point in a shorter time period than required by Test Method .
1.1 This test method covers the determination of the cloud point of petroleum products, biodiesel, and biodiesel blends that are transparent in layers 40 mm in thickness, using an automatic instrument.
1.2 This test method covers the range of cloud point temperatures from –50 °C to +6 °C.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D2500 Test Method for Cloud Point of Petroleum Products and Liquid Fuels
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material
Energy Institute StandardIP219 Test Method for Cloud Point of Petroleum Products
ICS Number Code 75.160.20 (Liquid fuels)
UNSPSC Code 15101801(Biodiesel)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D7689-20, Standard Test Method for Cloud Point of Petroleum Products and Liquid Fuels (Mini Method), ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top