Pipe in tube systems (NT VVS 129)

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  • Report #: NT VVS 129
  • Approved: September 2002
  • Hits: 0


This Nordtest method specifies test methods for testing complete Pipe in tube systems for fitness in use. The systems consist of an inner PEX pipe, an outer protection pipe, couplings, rubber seals, sleeves, wall boxes, other bushings and manifold cupboards.

The tests described here include testing of:

• Outer protection pipe

• Fixing sleeves and end sleeves

• Rubber seals

• Wall boxes, bushings

• Manifold cupboards

• Exchangeability of the inner pipe.


Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.