Pipeline components and pipelines
- 23/23.040/23.040.01 Pipeline components and pipelines in general
- 23/23.040/23.040.03 Pipelines and its parts for external water conveyance systems
- 23/23.040/23.040.05 Pipelines and its parts for external sewage systems
- 23/23.040/23.040.07 Pipelines and its parts for district heat
- 23/23.040/23.040.10 Iron and steel pipes
- 23/23.040/23.040.15 Non-ferrous metal pipes
- 23/23.040/23.040.20 Plastics pipes
- 23/23.040/23.040.40 Metal fittings
- 23/23.040/23.040.45 Plastics fittings
- 23/23.040/23.040.50 Pipes and fittings of other materials
- 23/23.040/23.040.60 Flanges, couplings and joints
- 23/23.040/23.040.70 Hoses and hose assemblies
- 23/23.040/23.040.80 Seals for pipe and hose assemblies
- 23/23.040/23.040.99 Other pipeline components