DIN Standards Committee Materials Testing
Hard coal - Determination of the crucible swelling number (ISO 501:2025)
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).
Begin
2026-03-27
Planned document number
DIN ISO 501
Project number
06237091
Responsible national committee
NA 062-03-101 AA - Testing of solid fuels - coal, coke and pyrolysis products
Responsible international committee
ISO/TC 27/SC 5/WG 10 - Plastic properties of coal
previous edition(s)
Hard coal - Determination of the crucible swelling number (ISO 501:2012)
2021-09
