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pau wrap® Spacers

TDC’s pau wrap® Spacers are designed as an efficient sacrificial composite collar to protect pipelines that are inserted into microtunnels and casing pipes. These highly abrasion-resistant integrated spacers are designed in a unique way, to distribute the weight of the pipes as they travel through the tunnels and can be integrated seamlessly into our pau wrap® TL products or used on a standalone basis. During the installation, they enable the pipeline to stay at a minimum distance from the casing or tunnel internal surface and take on the full abrasion against the stresses caused by the pull forces and friction.

The exact design parameters for a pau wrap® Spacer are determined jointly between our technical team and the clients’ engineering team. The pau wrap® Spacers’ shape, thickness and wear properties can all be tailor-made to accommodate a project’s requirements and technical constraints, ensuring a perfect fit and optimal performance.

  • Made of customisable composite
  • For microtunnels and casing pipes
  • Factory-applied directly on line pipe
  • Additional mechanical protection as sacrificial layer for abrasion during installation
  • Reducing construction complexity
  • Removes the need for site-applied pipe protection measures
  • Designed to customer requirements and project specifications


  • Highly abrasion resistant
  • Works with various types of tunnel material
  • High shear strength, no risk of displacement of spacers during pull-in operations
  • Highly abrasion resistant
  • High compressive strength
  • Manpower savings on-site
  • No risk of displacement of spacers during pulling operations
  • No hinderance or interference to cathodic protection systems
  • Can be applied on any pipe size ranging from DN 80 to DN 1600 (others upon request)

Certificates & Standards

Our qualified and trained applicators inspect the pipes in accordance with our strict Quality Management System. pau wrap® Spacers are regularly audited and certified by:

  • TÜV Octagon
  • ISO 9001
  • Client technical specifications and customer audits

For technical specifications: