Manufacture of clay products

Units in this sub-class include the manufacture of: - refractory ceramic goods like refractory bricks - structural non-refractory clay building materials like ceramic bricks - refractory ceramic goods: tiles and pipes - non-refractory ceramic hearth or wall tiles, mosaic cubes etc. - structural non-refractory clay building materials: roofing tiles, chimney pots, pipes, conduits, etc. - flooring blocks in baked clay - refractory mortars and/or concretes manufacturing - refractory ceramic goods: heat-insulating ceramic goods of siliceous fossil meals and/or blocks etc., retorts, crucibles, muffles, nozzles, tubes, etc. manufacturing - non-refractory ceramic flags and/or paving manufacturing - ceramic sanitary fixtures manufacturing - refractory articles containing magnesite, dolomite or chromite manufacturing