Standard Test Method for Determination of Slurry Abrasivity (Miller Number) and Slurry Abrasion Response of Materials (SAR Number)

Importancia y uso:

5.1 The Miller Number6 is an index of the relative abrasivity of slurries. Its primary purpose is to rank the abrasivity of slurries in terms of the wear of a standard reference material. The wear damage on the standard wear block is worse as the Miller Number gets higher.

5.2 The D2 Number is an alternative index of the relative abrasivity of slurries. Its primary purpose is to rank the abrasivity of slurries in terms of the wear of a standard reference material. The wear damage on the standard wear block is worse as the Miller Number gets higher.

5.3 The SAR Number is an index of the relative abrasion response of materials as tested in any particular slurry of interest. The SAR Number is a generalized form of the Miller Number or D2 Number applicable to materials other than the reference material used for the Miller Number or D2 Number determination. A major purpose is to rank construction materials for use in a system for pumping and fluid handling equipment for a particular slurry. It can also be used to rank the abrasivity of various slurries against any selected construction material other than the reference material specified for a Miller Number or D2 Number determination. The slurry damage on the specimen of material being tested is worse as the SAR Number gets higher.

5.4 Experience has shown that slurries with a Miller Number, D2 Number, or a SAR Number of approximately 50 or lower can be pumped with minor abrasive damage to the system. Above a number of 50, precautions must be observed and greater damage from abrasion is to be expected. Accordingly, the Miller Number, D2 Number, and the SAR Number provide information about the slurry or the material that may be useful in the selection of pumps and other equipment and to predict the life expectancy of liquid-end parts of the pumps involved.

5.5 The SAR Number can be used to determine the most suitable materials for certain slurry systems.

Subcomité:

G02.30

Volúmen:

03.02

Número ICS:

17.040.20 (Properties of surfaces)

Palabras clave:

Miller Number; SAR Number; slurry abrasivity; slurry material wear;