Axial expansion joints are expansion joints that absorb mainly longitudinal movements axially along a straight section of pipe.
![Axial expansion joint flared flanges and guide sleeve by HKS HKS axial expansion joint with rotatable flared flanges at both ends and inner guide sleeve](assets/images/6/axial-expansion-joint-flared-flanges-guide-sleeve-6380d876.jpg)
Advantages of axial expansion joints
- Simple means of compensation
- Smaller space requirements
- No alteration of flow movement
- Movement possible in any direction
- No redirection of pipe work required
- Low unit costs
Disadvantages of axial expansion joints
- High axial forces at higher pressures
- Strong fixed points and good axial pipe guides required
- Small and medium movement absorption
- For large expansion movements several axial expansion joints are required
- On long stretches many fixed points and pipe guides are required
Axial expansion joint variants | |
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Connection parts |
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Guide tubes |
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Outer protection tube |
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One or two bellows |
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![Simplified graphic representation of a expansion joint in axial movement A simplified graphic representation of an expansion joint in axial motion](files/content/Expansion%20Joint/Corrugated%20tube%20expansion%20joints/Axial%20expansion%20joints/schematic-diagram-expansion-joint-axial-motion.gif)