Pipes and fittings made of thermoplastic materials with profiled wall and smooth pipe inside - Large pipes over DN 1200 for underground installation - Part 1: General requirements and performance characteristics— 24 стр.
Pipes and fittings of unplasticized poly(vinyl chloride) (PVC-U) with ring seal socket for non pressure underground drainage and sewerage - Part 3: Quality control and installation— 11 стр.