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ASTM D5003-06a

Historical Revision

Standard Test Method for Hardgrove Grindability Index (HGI) of Petroleum Coke

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1.1 This test method covers the determination of the hardgrove grindability index (HGI) of those petroleum cokes that contain no dedusting additive. The procedure for this test method is the same as in Test Method D 409. Sections of this test method contain the significance and use of the HGI of petroleum coke, preliminary sample preparation procedures, and procedure and precision and bias data specific to petroleum coke. Note 1 - The size consistency (particle size distribution) of fluid petroleum coke is generally 100 % passing a 6.73 mm (No. 3) sieve and greater than 80 % passing a 2.00 mm (No. 10) sieve. Much of fluid cokes will pass a 0.59 mm (No. 30) sieve. Because of this fineness the HGI value is related to the coarser particles in fluid coke and large samples are required to prepare sufficient material of the correct particle size for Test Method D 409.

1.2 The values stated in SI units are to be regarded as standard and are used in this test method for all values except the hardgrove grindability index, which is unitless. The values in parentheses are provided for information only.

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 and health practices and determine the applicability of regulatory limitations prior to use.


The HGI is used to predict the ranking of raw petroleum cokes or calcined petroleum cokes in industrial size mills used for crushing operations. The rankings are based on energy required and feed rate or both.

The HGI is also used to select raw petroleum cokes and coals that are compatible with each other when milled together in a blend so that segregation of the blend does not occur during particle size reduction.

SDO ASTM: ASTM International
Document Number D5003
Publication Date Dec. 1, 2006
Language en - English
Page Count 3
Revision Level 06a
Supercedes
Committee D02.05
Publish Date Document Id Type View
Jan. 1, 2019 D5003-19 Revision
June 15, 2018 D5003-18 Revision
Dec. 1, 2006 D5003-06A Revision
July 1, 2006 D5003-06 Revision
April 10, 2000 D5003-95R00E01 Revision
Oct. 1, 2017 D5003-06AR17 Reaffirmation
May 1, 2011 D5003-06AR11 Reaffirmation
May 1, 2005 D5003-95R05 Reaffirmation