SCHOTTEL SV 1, Manual

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Piping Systems for Hydraulic, Lubrication and Similar Systems STD--Wa 07/3110 1099237 17
Reducing adapters
In practice it showed that on site metric or identical di-
mensions of pipes are not always existing.
In order to obtain a good connection is spite of that,
”reducing joints” can be used,
or it is possible to make ”reducing joints directly inside
the pipe”.
Reducing joints
There are several versions of reducing joints.
At one side there is a metric pipe Ø OD (4/1), at the
other side another pipe Ø OD (4/3), whether metric
(mm) nor inch (”), depending on requirement.
This way, the joint (4/2) can be connected at one side
with the pipe supplied by SCHOTTEL, and at the other
side with the pipe available on site.
In comparison with welded connections, these connec-
tions have the following advantages:
− Same way of mounting as in case of standard
joints
−
Removable
−
No rework after mounting contrary to welded con-
nections
Reducing joints can be re--ordered from SCHOTTEL.
1
2
3
Figure 4
Reducing adapters directly inside the pipe
In case matching reducing joints are not available, it is
also possible to join pipe tail ends with different outside
pipe diameters by welding.
For this process it is important the inside pipe diameter
does not form an obstruction for the oil flow.
The following points are to be observed:
D
The pipe tail end with the smaller outside diameter
has to be bevelled on the inside (5/1).
D
The pipe ends should fit into each other as tight as
possible.
D
For preparing the welding, the pipe tail end with the
larger outside diameter has to be bevelled on the
outside (5/2).
D
The joint is to be uniformly welded all around (5/3).
1
Ø
OD
~
1 x Ø OD
2
3
Figure 5