Research Report RR:D02-1744

    At the December 2010 meeting of D02.07.D task group (TG 32) was formed to establish the precision of the 3�C results from D7346 Test method for No Flow Point of Petroleum Products and the relative bias these results might have compared to D97 Test Method for Pour Point of Petroleum Products. D7346 determines the No Flow Point with a resolution of 0.1C and can round that temperature to the next warmer 3�C interval. Other Pour Point test methods similarly determine first the No Flow Point, then report the temperature found 3�C warmer. An interlaboratory test program was designed and presented to D02.07.D which eventually consisted of 12 laboratories participating using D7346, and 12 laboratories participating using D97. As in most ILS, not all of the participating laboratories returned data resulting in a final total of 11 laboratories for D7346 and 10 laboratories for D97. The samples that were included consisted of; 6 fuels, 5 base oils (mineral and synthetic), and 9 finished lubricants (mineral and synthetic) covering the expected Pour Point range of +15 to - 60�C. The samples were obtained from 7 different suppliers. The samples were shipped as blind duplicates and coded such that the duplicate sample was unknown.

    Published: August 2012

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    Related Standards

    D7346-15 Standard Test Method for No Flow Point and Pour Point of Petroleum Products and Liquid Fuels

    Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants

    Subcommittee D02.07 on Flow Properties