ONORM EN 476 : 2011

Foreword
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
    3.1 External diameter OD
    3.2 Factory production control
    3.3 Flexible pipe
    3.4 Gravity system
    3.5 Invert
    3.6 Internal diameter ID
    3.7 Joint
    3.8 Nominal size DN
    3.9 Pipe barrel
    3.10 Proof load
    3.11 Quality control system
    3.12 Rigid pipe
    3.13 Ring stiffness
    3.14 Semi-rigid pipe
    3.15 Surface water
    3.16 Ultimate load
4 General functional and dimensional requirements
    4.1 Dimensions of pipes and fittings
    4.2 Geometry of pipes
    4.3 Geometry of fittings
    4.4 Smoothness of bore
    4.5 Appearance and soundness
    4.6 Longitudinal bending moment resistance
    4.7 Interconnection
    4.8 Corrosion resistance
    4.9 Abrasion resistance
    4.10 Modification
    4.11 Coatings and linings
    4.12 Long-term behaviour
    4.13 Durability
    4.14 Sealing elements
5 Functional requirements for discharge components
    inside buildings
    5.1 General
    5.2 Strength of pipes
    5.3 Watertightness
    5.4 Airtightness
    5.5 Temperature
    5.6 Thermal expansion
6 Functional and dimensional requirements for drains
    and sewers that are generally buried
    6.1 Dimensions of manholes and inspection chambers
    6.2 Continuity of invert
    6.3 Load bearing capacity and stiffness
    6.4 Strength of manholes, shafts and inspection
          chambers above the base unit
    6.5 Watertightness
    6.6 Temperature
    6.7 Dimensional stability
7 General test methods
    7.1 Measurement of diameters and wall thicknesses
    7.2 Measurement of deviation from straightness of barrels
    7.3 Measurement of deviation from squareness of the
          ends of the pipes
    7.4 Longitudinal bending moment resistance test for
          pipes
8 Test methods for discharge components for use inside
    buildings
    8.1 Watertightness test
    8.2 Elevated temperature cycling test
    8.3 Airtightness test
9 Test methods for components for drains and sewers
    outside buildings
    9.1 Continuity of invert
    9.2 Crushing/stiffness tests for pipes
    9.3 Crushing/stiffness tests for sections of manholes
          and shafts
    9.4 Loading test for reducing slabs
    9.5 Loading test for tapers
    9.6 Watertightness tests
10 Quality tests
11 Marking

Defines general requirements for components eg pipes, fittings and manholes with joints intended for use in discharge pipes, drains and sewers operating as gravity systems with possible pressure not in excess of 40 kPa. Gives general basis for preparing or revising product standards, but does not apply to the evaluating of products. Applies as a reference for drawing up a product specification if no product standard is available.