1.0.1 This standard is applicable to the calculation of the resistance to the flow of flue gas, air channels and media in tubes of atmospheric chemical industrial furnaces and tube furnaces with combustion systems, blast systems, and flue gas systems. 1.0.2 This standard does not apply to reactors with fillers or catalysts and special industrial furnaces.
HG/T 20575-1995 history
1995HG/T 20575-1995 Specification of Resistance Calculation for Chemical Industrial Furnace