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WIDOS
Einsteinstr. 5
Phone +49 (0) 71 52 99 39 - 0
W. Dommer Söhne GmbH D-71254 Ditzingen-Heimerdingen Fax
+49 (0) 71 52 99 39 - 40
Website: http://www.widos.de
Email: inf [email protected]
12.02.04
Working Instructions WIDOS HRG 14, Segment
Page 13 of 42
3. Functional Description
Ba s i c a l l y , t h e i n t e r n a t i o n a l a n d n a t i o n a l g u i d e l i n e s a r e t o b e
f o l l o w e d !
The plastic pipes are clamped in the clamping rings.
If the pipe ends are not plane and parallel, the front sides of the pipes should be cut plane
and parallel by means of a
planer
and the misalignment of the pipes is to be checked.
Then the heating element is inserted and the pipes are pressed against the heating element
under defined adjusting pressure. This process is called
"adjusting"
.
After the prescribed bead height being reached, pressure is reduced, the
heating time
begins. The function of this time is to heat up the pipe ends.
After expiration of the heating time, the slides are opened, the heating element is
removed quickly and the pipes are driven together again. The time gap from the removal of
the heating element to joining the pipes is called
change over time.
The pipes are joined under prescribed w elding pressure and then cool dow n under pressure
(
cooling time
).
The w elded joint can be unclamped, the w elding process is finished.
Heating element heats the
pipes up to w elding
temperature
Finished w elding
w ith internal and
external bead
