IP 618: Determination of cold filter blocking tendency

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  • Method adopted/last revised: 2019
  • Method reapproved: None
  • REF/ISBN: IP618-7250659
  • Status: New
  • First printed in STM books: May 2020

This standard specifies a method for the determination of the cold filter blocking tendency (CFBT) and cold filterability of middle distillate fuel oils containing biodiesel from 0 % to 20 %, at temperatures between ambient and -5 °C where the end use demands an exceptional degree of cleanliness. The method is applicable to fluids within the viscosity range of 1,2 mm2/s to 6,0 mm2/s at 40 °C.

A change in filtration performance after storage or pre-treatment, such as cold soaking, can be used to indicate potential filter blocking problems or small changes in fuel condition. Appendix C describes an optional cold soak procedure.

The standard test operating temperatures are 3 °C and -1 °C.

NOTE — Test temperatures below the cloud point of the sample are not advised and can produce erratic results.

WARNING — The use of this standard can involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of users of this standard to take appropriate measures to ensure the safety and health of personnel prior to application of the standard, and fulfil statutory and regulatory requirements for this purpose.

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