Standard

ISO 501:1981

Withdrawn

Note: This standard has a new edition: ISO 501:2025

Corrigendums and amendments are bought separately.

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Abstract

The sample is heated in a covered crucible under standard conditions to a final temperature of 820 +- 5 °C. The coke button obtained is classified by comparison with the outlines of a set of standard profiles. The number of the profile most closely corresponding to the coke button obtained is the crucible swelling number. Gas or electrical heating may be used. When using an electrically heated apparatus, the results obtained should be the same (within 1/2 unit) as those obtained by the gas heating method.

Document information

  • Standard from ISO
  • Published:
  • Withdrawn:
  • Edition: 2
  • Version: 1
  • Document type: IS
  • ICS 73.040
  • ISO TC ISO/TC 27

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