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Installation Instructions of Expansion Joint

 final-prod02 Installation Instructions - Flexible Metal Hose Manufacturer | Hengshui Ruiming
Installation and maintenance instructions for one-and multi-layer expansion joints.
 
The piping system must be adecuadamenre anchored and guided to limit the pipe movements that the expansion board must absorb. View the space and anchorage requirements of the EJMA standard.
Ensure that the entire pipe is supported so that the expansion joint does not hold this load.
The operating conditions must be within the limits provided in the catalogue and/or drawing.
Install the expansion joints with the face-to-face neutral dimensions, as shown in the sent drawing.
If the expansion joint is to be installed with an initial misalignment, the compression and/or expansion movements, in addition to the maximum permissible movements, are reduced depending on this initial deflection.
Caution: Expansion joints are not designed to react to torque or torsional movements (in a plane perpendicular to the centerline). It is necessary to ensure that there are no such conditions in the system design or for lack of alignment of the installation.
Restrictors can be welded or threaded at the factory to ensure installation at the correct length and alignment. Whenever it is possible to leave these restrictions in place during installation. However, they should be removed before operating the system.
Braces or control rods may be included in some expansion joints. They are designed to
(1) limit the over-travel
(2) to absorb the pressure of the expansion joint in the event of a defect of the main anchor
(3) to absorb the design pressure of the lateral movement system and there are no anchors within it.
Note: The system design should be carefully checked for proper use of these bars as they may restrict the movements of the expansion board if used incorrectly.
Warning: Provide protection to the thin wall of expansion joint ripples during removal of shipping restrictions whether they are being cut or ground. Sparks can damage the ripples.
Some designs include flow lines or sleeves which extend through the connector gap. A mark must be included on the outer surface of the expansion board to indicate the direction of the design flow. The expansion joint should be installed as shown. If there is any possibility of inverse flow or entrapment of material behind the liner, the design engineer or a ruiming representative must be consulted before operating the system.
All expansion joints are tested at 1.5 times the operating design pressure. System tests should not exceed this pressure.
 
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