Standard Classification of Goods (SCG) 2001

• XVI - Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles
• 84 - Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

8404 - Auxiliary plant for use with boilers of heading No. 84.02 or 84.03 (for example, economisers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapour power units