Standard Test Method for Water and Sediment （标准试验方法对水和沉积物）.pdfVIP

Designation: D 2709 – 96 (Reapproved 2001)1 Standard Test Method for Water and Sediment in Middle Distillate Fuels by Centrifuge1 This standard is issued under the fixed designation D 2709; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1 NOTE—Warning notes were placed in the text editorially in June 2001. 1. Scope 4. Summary of Test Method 1.1 This test method covers the determination of the volume 4.1 A 100-mL sample of the undiluted fuel is centrifuged at of free water and sediment in middle distillate fuels having a relative centrifugal force of 800 for 10 min. at 21 to 32°C (70 viscosities at 40°C (104°F) in the range of 1.0 to 4.1 mm 2/s to 90°F) in a centrifuge tube readable to 0.005 mL and (1.0 to 4.1 cSt) and densities in the range of 770 to 900 kg/m3. measurable to 0.01 mL. After centrifugation, the volume of water and sediment which has settled into the tip of the NOTE 1—Fuels corresponding to Specification D 975 Grades 1D and 2D, Specification D 2880 Grades 0-GT, 1-GT and 2-GT, and Specification centrifuge tube is read to the nearest 0.005 mL and reported as D 3699 Grades 1-K and 2-K will usually fall in this viscosity and density the volumetric percen