ISO 2950:1974 Preview
Brown coals and lignites -- Classification by types on the basis of total moisture content and tar yield
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.
Brown coals are classified in this International Standard according to the following properties: total moisture content calculated on the ash-free basis; tar hiels calculated on the dry, ash-free basis. In tables class numbers, group number and code numbers of brown coal types are given.
Buy this standard
A standard is reviewed every 5 years
Revisions / Corrigenda