• The solid wall pipe is the traditional design.
• They are used in many ways especially as pressurised water pipes and gas pipes. The thickness of the solid pipe wall is critical for pressure resistance
  

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Pipes with structured walls

• These lightweight pipes do not have great internal pressure resistance.
• They have advantages if ring stiffness or vertex pressure resistance is important, e.g. when laid underground.
• Less material used to manufacture the pipes
  

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The most important designs:

• Foam core pipes where the centre layer of the pipe wall has a foam structure,
  • normally used today for KG sewer pipes.
    
• Single layer corrugated pipes with great flexibility. Used mainly as:
  • Electrical installation pipes.
  • Agricultural drainage pipes,
  • Cable protection pipes in automobile construction.
  • Cable protection pipes in the domestic appliance industry etc
    

• Double wall corrugated pipes with smooth inner layer:
  • Stiffening the corrugated structure mainly in an axial direction,
  • Good hydraulic properties (water drainage capacity),
  • Mainly used:
    • For drainage during street building,
    • For cable protection pipes for cables laid underground,
    • As sewer pipes,
    • For rain water management
      

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