widos HRG 6 Segment, Working Instructions Translation

Page: 14 / 36

WIDOS
Einsteinstraße 5 Phone +49 7152 9939 0
Wilhelm Dommer Söhne D-71254 Ditzingen Fax +49 7152 9939 40
GmbH info@widos.de Internet: www.widos.de
06/06/19 Working Instructions WIDOS HRG 6, Segment Page 14 of 47
3 Functional description
B a 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 welding pressure and then cool down under pressure (cooling
time).
The welded joint can be unclamped, the welding process is finished.
Finished welding with
internal and external
bead
Heating element heats
the pipes up to welding
temperature