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ISO 501:2025

Hard coal — Determination of the crucible swelling number

Publication date:   May 1, 2025

General information

60.60   Standard published   May 1, 2025

ISO

ISO/TC 27/SC 5 Methods of analysis

International Standard

73.040   Coals | 75.160.10   Solid fuels

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Scope

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).

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 501:2012

NOW

PUBLISHED
ISO 501:2025
60.60 Standard published
May 1, 2025