NIC 2391—Manufacture of refractory products

Where 2391 sits

1. C Manufacturing
2. 23 Manufacture of other non-metallic mineral products
3. 239 Manufacture of non-metallic mineral products n.e.c.
4. 2391 Manufacture of refractory products

Contains 4 narrower codes

• 239101 Manufacture of refractory mortars, concretes and similar materials
• 239102 Manufacture of refractory bricks, blocks tiles and similar refractory ceramic constructional goods
• 239103 Manufacture of refractory ceramic goods such as heat-insulating ceramic goods of siliceous fossil meals, retorts, crucibles, muffles, nozzles, tubes, pipes and similar items
• 239199 Manufacture of other refractory articles n.e.c.

What 2391 includes

• For details on Industry Class 2391, refer to the industry descriptions under its subcategories

What 2391 excludes

• Manufacture of non-refractory bricks and other clay and ceramic building materials, see 2392

2391 in other systems