FW STEEL-CASED PIPE-IN-PIPE
“The pipes with the red cap!” and their characteristics:
- FW pipe bearing with red caps in Celle
- Suitable for use both below and above ground
- Suitable for use in all types of soil
- Testable at any time
- Usable under any operating conditions
- Safe in case of flooding
- Usable for any media as the material of the inner pipe can be adapted
- FW STEEL-CASED PIPE-IN-PIPE is operated with vacuum in the ring space because:
- thermal losses are reduced by up to 50%
- the tightness of the system is permanently controlled
- by the removal of oxygen and humidity the external side of the inner pipe and
the interal side of the encasing pipe is permanently protected from corrosion. - Equipped with cathodic corrosion protection (where electrical ground resistance is ≤ 10,000 Ohm cm)
- Offers a high degree of prefabrication. All fittings such as elbows, anchors, watertight wall ducts, axial compensator end seals, T-junctions, reductions, pipe bearings, compensators, etc. are installed in or on the 12 - 16 metre long construction units at the factory.
- Both the encasing and the inner pipe are welded so as to be pressure-resistant and vacuum-tight
- FW STEEL-CASED PIPE-IN-PIPE- anchors do not need concrete foundations
- The steel-cased pipe-in-pipe, firmly installed in the ground, absorbs soil and traffic loads; the inner pipe is free to expand when exposed to heating
- Inner pipes can be thermally pre-stressed against the encasing pipe; this enables long routes to be built without compensators