RE 63124-B, Edition: 08.2021, Bosch Rexroth AG
Assembly |
Press modules Type IH04 27/56
• Hose lines must not be used where a pressure drop can lead to an unintended
dangerous movement of the press slide.
• Pipe connections shall not be made of a clamp ring fitting, bonded rings or similar
parts, but shall be made as positive connections or as welded flange connections.
According to EN 289, par. 5.3.1.1, one or more of the following options
must be used to prevent whipping of hose lines for hydraulic fluids with pressures
higher than 50 bar:
•
Option 1:
Use of a tear-proof hose line:
– Certificate including drawing and test report required
– Use of hose lines with at least two steel cord layers required to achieve
a tear-proof connection
– Ratio of bursting pressure of hose and fitting to maximum pressure in hydraulic
circuit must not be less than 3.5
•
Option 2:
Use of a fixed casing, see EN 953:1997+A1:2009, 3.2.1;
•
Option 3:
Fastening of the hose lines with additional means, e.g. with a chain,
see EN ISO 4413:2010.
In addition, to prevent unintended loosening from the connection points,
cutting ring connections must not be used. Suitable connections are, for example,
flange connections, flared or sealing cone fittings.
Before installation, care must be taken in accordance with DIN 3387 to ensure that
the pipe ends to be connected are free of burrs, undeformed and without threads.
Paint coatings and contamination must be removed. The fitting can be reused
after replacing the combi-seal.
The maximum admissible pressure depends on the pipeline (manufacturer's
specifications) or hose line used (manufacturer, product standard, hose type,
operating pressure, date of manufacture) and the tightening torque of the fitting.
The angle of rotation is not a suitable value for reliable assembly.
Furthermore, the maximum admissible pressure depends on the steel pipe used
(specifications from the manufacturer) and the screw material grade of the flange
(with welded connection...).
▶ When assembling pipelines, proceed according to the instructions of the
suppliers of flanges and fittings (e.g. Voss):
– Determination of the tightening torque
– Pipe preparation
– Oiling the steel pipes
– Pipe deformation
– Check and final assembly
Provisions according to
EN 289, par. 5.3.1.1
Provisions according
to DIN 3387
Maximum
admissible pressure
