NEN EN 295-6 : 2013

Foreword
1 Scope
2 Normative references
3 Definitions
   3.1 Vitrified clay manhole
   3.2 Vitrified clay inspection shaft
4 Requirements
   4.1 Materials and manufacture
        4.1.1 Vitrified clay
        4.1.2 Vulcanized rubber sealing materials
        4.1.3 Polyurethane sealing materials
        4.1.4 Polypropylene couplings
        4.1.5 Materials of other components
        4.1.6 Manufacture
   4.2 Minimum bore
        4.2.1 Sections
        4.2.2 Pipeline connections
   4.3 Height
   4.4 Angle of curvature and radius of channel bends
   4.5 Branch angles of channel junctions
   4.6 Crushing strength (FN)
   4.7 Bending tensile strength
   4.8 Bond strength of adhesive used for fixing fired
        clay parts together
   4.9 Fatigue strength under pulsating load
   4.10 Chemical resistance
        4.10.1 Vitrified clay manholes and inspection shafts
        4.10.2 Other materials
   4.11 Water impermeability
   4.12 Infiltration
   4.13 Jointing systems of sections and pipeline
        connections
5 Sampling
6 Designation
7 Marking
   7.1 Manhole and inspection shaft components
   7.2 Flexible joints
   7.3 Limitation
8 Quality assurance
Annex A (normative) Water impermeability test for
        assembled manhole and inspection shaft sections
Annex B (informative) Manhole construction
Annex C (informative) Permanent structural performance
Figures
Table