DIN 19550:1987-10

1 Field of application
2 Concepts
      2.1 Pipes
      2.2 Fittings
      2.3 Overall length
      2.4 Nominal size
      2.5 Desires size
      2.6 Minimum size
      2.7 Quantities and units
3 Performance requirements
      3.1 Dimensional consistency
      3.2 Pipe and fitting dimensions
             3.2.1 Cross-sectional dimensions
             3.2.2 Overall length
             3.2.3 End faces
             3.2.4 Straightness
             3.2.5 Fittings
                      3.2.5.1 Bends
                      3.2.5.2 Junctions
                      3.2.5.3 Reducers
                      3.2.5.4 Access pipes and fittings
                      3.2.5.5 Connectors
                      3.2.5.6 Connections to existing pipes
                      3.2.5.7 Caps
      3.3 Continuity of invert level
      3.4 Hydraulic roughness
      3.5 Surface condition
      3.6 Dimensional stability
      3.7 Watertightness
      3.8 Thermal stability
      3.9 Interchangeability
      3.10 Long-term behaviour
      3.11 Chemical resistance
      3.12 Abrasion resistance
      3.13 Material
      3.14 Cutting of pipes
      3.15 Coating and linings
      3.16 Jointing of pipes
      3.17 Maintenance, cleaning and repair
      3.18 Marking
4 Installation requirements
      4.1 Storage and transport
      4.2 Pipe laying
             4.2.1 Installation of pipes and fittings
             4.2.2 Connections to existing pipes
5 Testing
6 Inspection
7 Presentation of pipe standards