10
Table for flange-connecting dimensions
according to EN 1092, PN 10 with torques for
flange connections with PTFE edge flanges
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srews
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quantity
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thread
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torque
Installation Instructions for Axial and Universal Expansion
Joints (Type P-1, Ai-1) for Compensating Changes of Length
Q
Unrestrained PTFE expansion joints can be used for combining (overlapping) axial, la-
teral, and angular movements. Mind the reduction of individual movements! In case of
doubt, consult the manufacturer.
Q
Make sure the fixed points are dimensioned sufficiently. The fixed points must bear the
force F
FP
which results from the axial compression force (F
1
) plus the expansion-joint
adjustment force (F
2
) and the frictional forces of the guide bearings (F
3
) (
illus
.
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).
Q
Not more than one expansion joint may be installed between two fixed points.
Q
If there are several axial expansion joints, the pipe routing must be divided by intermedi-
ate fixed points.
Q
The pipeline with axial expansion joints must be guided through bearings precisely. Gui-
de bearings must be placed on both sides of the expansion joint. A fixed point replaces
a guide bearing (
illus.
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).
Internal guiding pipes are not suitable as pipe guiding devices.
Illus.
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Arrangement of fixed points and guide bearings -
L
1
울
3 x DN, L
2
= 0,5 · L
3
, L
3
see
illus.
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.
Illus
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Diagram guide-bearing distance (L
3
) PN 6, PN 10, PN 16 -
0-18 guide-bearing distance L
3
[m] (approximate values), 0-250 nominal width.
Installation Instructions for Lateral Expansion Joints (Type P-2,
Type P-4 and Type Ai-2) for Compensating Lateral Movements
Q
Lateral expansion joints need light fixed points on both sides. They must absorb the
adjustment forces of the expansion joints as well as the friction at the joints and pipe-
guiding devices.
Q
Only fasten the fixed points of the pipeline after the expansion joint has been mounted
(after pulling the flange screws tight).
Q
Not more than one compensating system may be installed between two fixed points.
Q
Suitable pipe-guiding devices must be installed at the compensating systems to absorb
the weight.
Q
Lateral expansion joints may be pre-tensioned. Normally, they are pre-tensioned by half
the movement listed in the dimension diagrams.
Legend
Pipeline
Fixed point
Guide bearing
Axial expansion joint
Lateral expansion joint
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C
ꔴ
A
Summary of Contents for PTFE
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