06
Metallic construction materials; pipes and pipe couplings of
metal in connection with pipelines for transporting and
distributing all liquids, hot and cold, gases and forms of
energy, compensator apparatus; metal containers for
radioactive waste, metal fences, metal screening, railway
sleepers, metallic coatings for pipes, metal tanks, manhole
covers of metal
07
Waste water treatment plants, sewer lift stations, slime
separators, oil separators, settlers, digestors, filtering
machines, screen-cleaning machines, scrubbers, waste matter
separators, blade separators, oil separators, grease
separators, pumps (machines), ventilators
11
Distribution plants for all liquids, cold and hot, gases and
forms of energy, regulating and safety accessories for
liquid and gas pipes
17
Pipe joints, parts of couplings for pipes
19
Pipes and accessories not of metal for pipelines for
transporting and distributing all liquids, hot and cold,
gases and forms of energy; construction materials not of
metal, paving stones, curbs, pavement curbs, rail supports,
manholes, technical chambers and galleries, prefabricated
shelters (military and civil), segments, retaining walls,
roof side walls, modular elements for waste, facilities,
noise screens, paving, gutters, slabs of concrete and
cement, turf-honeycombs, tree surrounds, storage tanks not
of metal, conveyance elements for cisterns and wells,
junction boxes not of metal for pipelines, vatting and
bypass devices not of metal for surface water and waste
water, structure ends, water downpipes, drainage slabs,
storage partitions not of metal, tanks not of metal,
fountains not of metal, bridges and cornices not of metal,
prefabricated elements for cellars not of metal; radioactive
waste containers, flue liners, beams, girders, columns,
fencing, spyholes for meters, columbarium vaults, concrete
floors, floors slabs, pre-slabs, hollow slabs, prefabricated
foundation blocks
37
Installation, repair and maintenance of pipelines, pipes,
installation of couplings and accessories in connection with
pipelines for transporting and distributing all liquids,
cold and hot, gases and forms of energy; construction,
repair and maintenance of tunnels, rehabilitation,
asphalting, sewerage and bypass for surface waters and
sewage; rental of machines for building sites, drilling,
construction and repairing buildings, road works, pile
driving, boring
42
Piping system project study