Under publication
ISO 501
Hard coal — Determination of the crucible swelling number
Reference number
ISO 501
Edition 5
© ISO 2025
Under publication
Under publication
Final production steps (up to seven weeks).
Will replace ISO 501:2012

Abstract

ISO 501:2012 specifies a method for determining the swelling properties of hard coal when heated in a covered crucible.

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

General information

Life cycle

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