Pragma pipes

7.5 Locking against pulling out of socket connection of Pragma ® DN/OD pipes
In practice pipes are buried in unfavorable soil conditions – loess, landslides, expansive soils which can lead to dislocation of the bed
of the already buried pipes. In case of mass construction of infrastructure sewerage, structured-wall pipes with socket connection
with rubber sealing are used. Under these conditions there is a risk of socket pulling out and respectively leak-tightness loss and soil
contamination. Nevertheless, it is possible, due to carelessness in work during the backfill, the pipe not to be tight well and when the
trench and the bed are not cultivated and stabilized the risk of pulling out is increased.
That is why Pipelife Bulgaria decided to offer a simple and effective tool for locking the socket connection which practically guarantees
its protection against pulling out.
On the Figures below can be seen the different elements, necessary for this type of connection, the pipes prepared for assembly and
the final result – Pragma locked socket connection.
Figure 7.4 Necessary Elements For The Locked Socket Connection
1. Socket End Of Pragma Pipe;
2. EPDM Sealing Ring;
3. EPDM Sealing Ring Turned Opposite To The Direction Of Pushing The Smooth End In The Socket End;
4. Smooth End Of Pragma Pipe;
5. EPDM Sealing Ring With “Click-Ring” Assembly Ring;
6. “Click-Ring” Assembly Ring;
18
Pipelife
www.pipelife.com