18
Internal guide sleeves are
not
suitable for pipe guiding.
Fig.
Fixed point and guide bearing arrangement -
L
1
3 x DN, L
2
= 0,5 · L
3
, L
3
refer to
Fig.
.
Fig.
Diagram – guide bearing spacing (L
3
) PN 6, PN 10, PN 16 -
0-18 guide bearing spacing L
3
[m] (guide values), 0-250 nominal width.
Installation instructions for axial and universal expansion joints
for equalising length changes w i t h pre-tensioning
As a rule, a rubber-type expansion joint is NOT pre-tensioned because the pipe expansion
in the line caused by relatively low temperatures is small and the expansion joint with its
high flexibility (compression greater than elongation) balances out the expansions. If the ex-
pansion joint is nevertheless pre-tensioned, details on the corresponding installation length
must be obtained from the manufacturer. Expansion joints shall only be pre-tensioned by
the size of the max. allowable elongation.
Installation sequence for the pre-tensioning of axial expansion joints on site
ATTENTION: this does n o t apply for expansion joints already pre-tensioned in the factory!
Fig.
Join the expansion joint (1) to the already solid piping (2) so that a displacement is
no longer possible. The other pipe part (3) lies loosely in the guides.
Fig.
The loose pipe part (3) is brought to point of contact and also joined to the expan-
sion joint (1).
Fig.
This loose pipe part (3) is then shifted with a suitable device (4) until the calcula-
ted installation length is achieved. Do NOT over-stretch the expansion joint! The
expansion joint is ready for operation after completed securement (5) and after
removal of the pre-tensioning device.
Important
The expansion joint shall o n l y then be pre-tensioned by the max. allowable elongation
if the commencing minimum temperature is not lower than the installation temperature.
Installation instructions for lateral expansion joints
for equalising lateral movements
Q
Lateral expansion joints require light fixed points on both sides. These must absorb the
adjusting forces of the expansion joints as well as the friction on joints and pipe guides.
Q
Fix-position the piping fixed points after Installation of the expansion joint (after tighte-
ning the flange screws). Failure to observe these instructions can lead to a destruction
of the expansion joint.
Q
In principle, only one equalising system shall be positioned between two fixed points.
Q
Suitable piping guides shall be installed on equalising systems for absorbing the weight
forces.
Q
Lateral expansion joints are set to construction length BL in the factory. After installation,
the tie rods must be frictionally connected to the flange. Any possible re-adjustment of
the tie rods shall only be done in coordination and consultation with our Technical Con-
sultation Service.
Q
Lateral expansion joints can be pre-tensioned. As a rule, pre-tensioning is performed by
half of the movement listed in the dimension sheets.
ꔴ
B
Summary of Contents for A Series
Page 2: ...2 ꔴ A ꔴ A 9 9 9 9 10 11 12 ...
Page 3: ...3 ꔴ B ꔴ M 3 3 3 3 2 3 3 FFP F1 F2 F3 ...
Page 4: ...4 ꔴ C ꔴ D ...
Page 76: ......
