PKD 23.20—Production of refractory products

Where 23.20 sits

1. C Industrial Processing
2. 23 Production of products from other non-metallic mineral raw materials
3. 23.2 Production of refractory products
4. 23.20 Production of refractory products

Contains 1 narrower code

• 23.20.Z Production of refractory products

What 23.20 includes

• Manufacture of intermediate products from mined or quarried non-metallic minerals (e.g. gravel, stone or clay)
• Manufacture of refractory mortars, concretes, etc.
• Manufacture of refractory ceramic goods, e.g.: • heat-insulating ceramic goods of siliceous fossil meals • refractory bricks, blocks and tiles, etc. • retorts, crucibles, muffles, nozzles, tubes, pipes, etc.
• Manufacture of refractory articles containing magnesium oxide, calcium magnesium oxide or chromite

23.20 in other systems