This NORDTEST method contairis some supplementary specifications to the measurement procedure stated in ISO 4736-1979, Fire Tests - Small chimneys - Testing at elevated temperatures.
This NORDTEST method is a more specified test method than ISO 4736, so that a test performed according to this NORDTEST method will also meet the demands of ISO 4736.
NORDEST NT FIRE 020-1985 history
1985NORDEST NT FIRE 020-1985 SMALL CHIMNEYS:HEAT INSULATION, TIGHTNESS AND MECHANICAL STRENGTH AT ELEVATED TEMPERATURES