www.linguee.com/english-hungarian/.../porcelain+stoneware.html
Manufacture of ceramic products by burning, in particular roofing tiles, bricks, .... materials' (NACE 23.3) and 'other porcelain and ceramic products' (NACE 23.4).

Results of the qualitative assessment of the manufacture of ...
ec.europa.eu/clima/.../qualitative_assessment_en.pdf
qualitative criteria set out Article 10a(17) of Directive 2003/87/EC. Manufacture of bricks, roof tiles and construction products, in baked clay (NACE code. 2640).

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Note added at 6 mins (2016-01-24 17:07:35 GMT)
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NaceCoder
Classification: NACE Rev 2
Code: 2332
http://www.cso.ie/px/u/NACECoder/NACEItems/2332.asp

Label: Manufacture of bricks, tiles and construction products, in baked clay
Synonyms: Block flooring made of clay mfr , Blue brick mfr , Brick engineering mfr , Bricks made of ceramic mfr , Bricks made of clay mfr , Building bricks (unglazed) mfr , Building bricks made of clay mfr , Building materials made of clay (non-refractory) mfr , Cable conduit made of clay mfr , Chimney pots made of ceramic mfr , Chimney pots made of clay mfr , Clay flag mfr , Conduits made of ceramic mfr , Conduits made of clay mfr , Drainpipes and fittings made of clay mfr , Engineering brick mfr , Floor and quarry tiles made of unglazed clay mfr , Flooring block made of clay mfr , Flue tiles made of clay mfr , Hearth tiles made of clay (unglazed) mfr , Paving tiles made of clay (unglazed) mfr , Pipes and conduits made of clay mfr , Pipes and fittings made of ceramics mfr , Pipes made of clay mfr , Quarry floor brick mfr , Quarry tile made of clay mfr , Roofing tiles made of ceramic mfr , Roofing tiles made of unglazed clay mfr , Tiles and construction products, made of baked clay mfr , Wall tiles made of clay (unglazed) mfr , Chimney liners made of clay mfr , Hollow partition made of clay mfr ,

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Note added at 7 mins (2016-01-24 17:08:34 GMT)
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The NACE Code 26.40 is described as
Manufacture of bricks, tiles and construction products, in baked clay

Description
This class includes:
· manufacture of non-refractory structural clay building materials:
· manufacture of ceramic bricks, roofing tiles, chimney-pots, pipes, conduits, etc.
This class also includes:
· manufacture of flooring blocks in baked clay
This class excludes:
· manufacture of structural refractory ceramic products, see 26.26
· manufacture of ceramic flags and pavings, see 26.30
(2009-03-27)

It belongs to the code group
NACE Code 26.4 Manufacture of bricks, tiles and construction products, in baked clay

To this Code "26.40" belongs the sub codes
(No direct sub codes available)


The equivalent ISIC Code (Rev. 3.1) is
2693: Manufacture of structural non-refractory clay and ceramic products
Fabrication de matériaux de construction non réfractaires en argile et en céramiq

The equivalent NAICS Code (Rev. 2002) is
327121: Brick and Structural Clay Tile Manufacturing

The Nearest HS Code (Harmonized System) (Rev. 2002) is
xxxx: No Code defined

Translation of the Code description
26.40: Herstellung von Ziegeln und sonstiger Baukeramik
26.40: Manufacture of bricks, tiles and construction products, in baked clay