update:

added missing/new:

CEN/TR 1046:2013 Thermoplastics piping and ducting systems - Systems outside building structures for the conveyance of water or sewage - Practices for underground installation
EN ISO 15493:2003/A1:2017 Plastics piping systems for industrial applications - Acrylonitrile-butadiene-styrene (ABS)* unplasticized poly(vinyl chloride) (PVC-U) and chlorinated poly(vinyl chloride) (PVC-C) - Specifications for components and the system - Metric series - Amendment
EN ISO 15876-1:2017 Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 1: General (ISO 15876-1:2017)
EN ISO 15876-2:2017 Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 2: Pipes (ISO 15876-2:2017)
EN ISO 15876-3:2017 Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 3: Fittings (ISO 15876-3:2017)
EN ISO 15876-5:2017 Plastics piping systems for hot and cold water installations - Polybutene (PB) - Part 5: Fitness for purpose of the system (ISO 15876-5:2017)


the missing are now:

EN 1453-1:2017 Plastics piping systems with structured-wall pipes for soil and waste discharge (low and high temperature) inside buildings - Unplasticized poly(vinyl chloride) (PVC-U) - Part 1: Specifications for pipes and the system
CEN/TS 1453-2:2017 Plastics piping systems with structured wall pipes for soil and waste discharge (low and high temperature) inside buildings - Unplasticized poly(vinyl chloride) (PVC-U) - Part 2: Guidance for the assessment of conformity
CEN/TS 12200-2:2017 Plastics rainwater piping systems for above ground external use - Unplasticized poly(vinyl chloride) (PVC-U) - Part 2: Guidance for the assessment of conformity
CEN/TS 15223:2008 Plastics piping systems - Validated design parameters of buried thermoplastics piping systems



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