ISO 501:2012 Preview
Hard coal -- Determination of the crucible swelling number
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.
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).
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