SECTION C : MANUFACTURE 
Division 23 : MANUFACTURE OF OTHER NON-METALLIC MINERAL PRODUCTS
GroupClassSub-classDescription
231  Manufacture of glass and glass products
 2310  Manufacture of glass and glass products
   This class excludes:
   - manufacture of woven fabrics of glass yarn, see 1312
   - manufacture of optical elements optically worked, see 2670
    -  manufacture of fiber optic cable for data transmission or live transmission of images, see 2731
   - manufacture of glass toys, see 3240
    -  manufacture of syringes and other medical laboratory equipment, see 3250
  23101Manufacture of glass in primary or semi-manufactured forms (such as sheets & plate glass) including mirror sheets and wired, coloured, tinted, toughened or laminated glass
  23102Manufacture of glass fibre (including glass-wool) and yarn of glass fibre; nonwoven glass fabrics, mats, boards and similar non-woven products
  23103Manufacture of hollow glassware (bottles, jars etc.) for the conveyance or packing of goods
  23104Manufacture of laboratory or pharmaceutical glassware
  23105Manufacture of table or kitchen glassware
  23106Manufacture of glass bangles
  23107Manufacture of glass decoration pieces and glassware used in imitation jewellery
  23109Manufacture of other glassware/glass products: articles of glass used in construction such as glass blocks; clock or watch glasses, optical glass and optical glass elements not optically worked; and other glass products (including glass beads) n.e.c.
239  Manufacture of non-metallic mineral products n.e.c.
 2391 Manufacture of refractory products
  23911Manufacture of refractory mortars, concretes etc.
  23912Manufacture of refractory bricks, blocks tiles and similar refractory ceramic constructional goods
  23913Manufacture of refractory ceramic products
  23919Manufacture of other refractory articles n.e.c.
 2392 Manufacture of clay building materials
   This class excludes:
   - manufacture of artificial stone (e.g. cultured marble), see 2220
   - manufacture of refractory ceramic products, see 2391
  23921Manufacture of bricks
  23922Manufacture of non-refractory ceramic sanitary wares: sinks, baths, watercloset pans, flushing cistern etc.
  23923Manufacture of non-refractory ceramic pipes, conduits, guttering and pipe fittings
  23929Manufacture of other clay building materials
 2393 Manufacture of other porcelain and ceramic products
   This class excludes:
   - manufacture of artificial stone (e.g. cultured marble), see 2220
   - manufacture of refractory ceramic goods, see 2391
   - manufacture of ceramic building materials, see 2392
   - manufacture of ceramic sanitary fixtures, see 2392
   - manufacture of imitation jewellery, see 3212
   - manufacture of ceramic toys, see 3240
   - manufacture of artificial teeth, see 3250
  23931 Manufacture of articles of porcelain or china, earthenware, imitation porcelain or common pottery, including earthen statues
  23932Manufacture of ceramic tableware and other domestic or toilet articles
  23933Manufacture of statuettes and other ornamental ceramic articles
  23934Manufacture of electrical insulators and insulating fittings of ceramics
  23935Manufacture of ceramic laboratory, chemical and industrial products
  23939Manufacture of ceramic products n.e.c.
 2394 Manufacture of cement, lime and plaster
   This class excludes:
   - manufacture of refractory mortars, concrete etc., see 2391
   - manufacture of articles of cement, see 2395
   - manufacture of articles of plaster, see 2395
   - manufacture of ready-mixed and dry-mix concrete and mortars, see 2395
   - manufacture of cements used in dentistry, see 3250
  23941Manufacture of clinkers and cement
  23942Manufacture of portland cement, aluminous cement, slag cement and similar hydraulic cement
  23943Manufacture of asbestos cement
  23944Manufacture of quicklime, slaked lime and hydraulic lime (excluding chewing lime)
  23945Manufacture of plasters of calcined gypsum or calcined sulphate
  23949Manufacture of other cement and plaster n.e.c.
 2395 Manufacture of articles of concrete, cement and plaster
   This class excludes:
   - manufacture of refractory cements and mortars, see 2391
  23951Manufacture of plaster statues and other plaster products
  23952Manufacture of articles articles of concrete, cement or artificial stone (tiles, bricks etc.)
  23953Manufacture of asbestos sheets
  23954Manufacture of R.C.C. bricks and blocks
  23955Manufacture of hume pipes and other pre-fabricated structural components of cement and/or concrete for building or civil engineering
  23956Manufacture of insulation boards of vegetable fibre, straw or wood waste, agglomerated with cement & other mineral binders.
  23959Manufacture of other cement and asbestos cement products n.e.c.
 2396 Cutting, shaping and finishing of stone
   This class includes cutting, shaping and finishing of stone for use in construction, in cemeteries, on roads, as roofing etc.
   This class excludes:
   - production of rough cut stone, i.e. quarrying activities, see 0810
   - production of millstones, abrasive stones and similar products, see 2399
   - activities of sculptors, see 9000
  23960Cutting, shaping and finishing of stone
 2399 Manufacture of other non-metallic mineral products n.e.c.
   This class excludes:
   - manufacture of glass wool and non-woven glass wool products, see 2310
  23991Manufacture of worked mica and mica products
  23992Manufacture of gypsum boards
  23993Manufacture of millstones, sharpening or polishing stones and natural or artificial abrasive products, including abrasive powder or grain on a base of textile material, paper, paper board or other material
  23994Manufacture of graphite products other than electrical articles
  23999Manufacture of other non-metallic mineral products n.e.c. (includes asbestos yarn and fabric, and articles of asbestos yarn and fabric such as clothing, headgear, footwear, cord, string, paper o felt; friction material with a basis of asbestos or other mineral substances or of cellulose including unmounted articles such as friction material; mineral insulating material (slag wool, rockwool and similar mineral wools, exfoliated vermiculite, expanded clays and similar insulating material); products of glass wool for heat-insulating; articles of asphalt or of similar material (e.g. coal tar pitch), gypsum and articles of other mineral substances)
 
     
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