WKG pipes - Duktus

Information about WKG pipes
Areas of use
Pipelines at risk of frost, e.g.:
� Bridge with pipelines
� Pipelines laid above ground
� Pipelines laid in the ground with minimal depth of covering
� Pipelines at risk of heat loss.
WKG pipe system structure
WKG pipeline systems consist of pipes and socket bends (MMK,
MMQ) made of ductile cast iron acc. to DIN EN 545 (for water) or DIN
EN 598 (for waste water) with TYTON ® push-in socket connections
acc. to DIN 28 603, with optional longitudinal force-locking.
The pipes are wrapped in a thermal insulating layer of hard CFC-free
polyurethane (PUR) foam with average overall density of 80 kg/m 3 .
This hard foam is protected from the effects of the weather in one of
two ways: For exposed (FL) pipelines, with a wrap fold sleeve made of
galvanised steel acc. to DIN EN 1506, or optionally stainless steel; and
for pipelines laid in the ground (EL) with minimal covering and thus with
risk of frost, with an outer sleeve made of PE-HD acc. to DIN EN 253.
The gap in the area around the push-in socket connection is filled out
with a ring made of soft polyethylene (WPE) and sealed with a sheet
metal collar (FL system) or a PE shrink strap (EL system).
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