International Standard
ISO 501:2025
Hard coal — Determination of the crucible swelling number
Reference number
ISO 501:2025
Edition 5
2025-05
© ISO 2025
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Published (Edition 5, 2025)

ISO 501:2025

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Format
CHF 65
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Abstract

This document specifies a method for determining the swelling properties of hard coal when heated in a covered crucible.

NOTE            The "crucible swelling number" (CSN) is also known as the "free swelling index" (FSI).

General information

  • Status
     : Published
    Publication date
     : 2025-05
    Stage
    : International Standard published [60.60]
  • Edition
     : 5
    Number of pages
     : 7
  • Technical Committee :
    ISO/TC 27/SC 5
    ICS :
    73.040  75.160.10 
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