ISO/CD 501
ISO/CD 501
Status : Under development


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

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)