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CEN/TC 155
Plastics piping systems and ducting systems
NA 119-07-18 AA
Plastics piping systems outside buildings
NA 054-05-08 AA
Plastics piping systems for the supply of gaseous fuels
NA 119-07-18-01 UA
Plastics piping components for water supply
CEN/TC 155/WG 34
Polyamid piping systems for gas supply
ISO/TC 138/SC 1/WG 4
Plastics piping systems for underground drainage and sewerage
ISO/TC 138/SC 2/WG 1
Plastics piping systems for hot and cold water applications