17
Gaskets, seals and closures; flexible pipes, pipe
reinforcements, not of metal, pipe seals, pipe covers and
pipe liners, not of metal; silicone pipes; silicone sealants
for pipelines; flexible conduits of silicone rubber for
plumbing purposes; pipe joint and sealing compounds for pipe
lining and sealing; pipe parts, not of metal, pipe fittings
consisting mainly of plastic; non-metallic pipe jackets;
rubber plugs; adhesive tapes for industrial use; substances
for insulating buildings against water and moisture
19
Construction materials; rigid pipes, not of metal; rigid
pipes, not of metal, for building; insulated pipes
(non-metallic -) for water; pre-insulated bonded pipes
(non-metallic -) for building; rigid pipes of plastics
[other than parts of sanitary installations]; rigid pipes,
not of metal; geotextiles; silicone branch pipes for
pipelines; fibreglass branch pipes for pipelines
37
Plumbing; installation of tubular linings in pipelines;
maintenance and repair of pipelines; rental of machinery,
equipment and supplies for the installation and renovation
of pipelines and pipes, and consultancy related thereto;
providing information on pipeline maintenance, upkeep and
renovation; consultancy relating to renovation of pipelines
and buildings
41
Educational and teaching services relating to pipelines and
pipeline renovation; educational and teaching services
relating to pipeline renovation for machinery, apparatus and
supplies