Expansion Joints and Seismic Compensators
A seismic expansion joint is a flexible expansion element designed to absorb the large, multi-directional movement between building blocks during an earthquake without damaging the pipeline.
It is used at joint crossings of fire sprinkler systems, hospitals, schools and critical buildings. The product range includes DN25–DN300 models with threaded, grooved and flanged ends in 100 mm and 200 mm series, some FM approved.
Main Applications
- Fire sprinkler joint crossings
- Hospital and school buildings
- Critical facilities in seismic zones
- Lines between building blocks
- Heating and cooling joint crossings
- Industrial plant connections
Technical Data
| Type | Building and seismic expansion joint |
|---|---|
| Sizes | DN25 – DN300 (product range) |
| Series | 100 mm and 200 mm (product name) |
| Connection | Threaded, grooved, flanged (product range) |
| Approval | FM-approved models (product name) |
| Flexible element | Metal bellows / braided hose (depending on model) |
| Pressure class | Depending on model |
| Temperature | Depending on model |
Material Options
| Part | 100 mm series | 200 mm series (FM-approved option) |
|---|---|---|
| Movement | Medium | Large |
| Connection | Threaded, grooved, flanged | Threaded, grooved, flanged |
| Approval | Depending on model | FM (by product name) |
| Typical use | Building joints | Fire lines, seismic zones |
Which material? On fire projects that require approval certificates, the FM-approved model and its certificate must be confirmed with the order. Pressure and temperature vary by model; FM information is taken from product names.
Advantages
Seismic Resistance
- Protects the line from breakage
FM Approval Option
- Suited to fire projects
Three Connection Types
- Threaded, grooved, flanged
Wide Size Range
- From DN25 to DN300
Construction and Design Features
- Flexible legs (metal bellows or hose)
- Return piece
- End connections
- Hanger and support points
Send the size, connection type, expected movement and approval needs; we will confirm a suitable seismic expansion joint.
How to Choose?
- Size and connectionChoose DN and threaded, grooved or flanged ends.
- PressureConfirm line pressure per model.
- MovementChoose the 100 or 200 mm series for seismic and joint movement.
- ApprovalState whether an FM certificate is needed.
Complementary Products
Why ORFA?
Other Metal Bellows Expansion Joints
Decorative Type Pipe Expansion Joint
Decorative type pipe expansion joints absorb thermal expansion while giving a neat look to exposed installations.
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Externally Pressurized Expansion Joints
Externally pressurized expansion joints, where pressure acts on the bellows from outside, absorb long axial movements.
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Limit Rod Expansion Joints
These expansion joints absorb movement between structures in pipelines crossing building expansion joints.
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Omega U-Flex Expansion Joints
Omega U-Flex expansion joints consist of metal hoses and elbows arranged in a U shape to absorb multi-directional movement at building joints.
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Expansion Joint Omega V-Flex
Omega V-Flex expansion joints consist of metal hoses arranged in a V shape to absorb multi-directional movement at building joints.
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Axial Metal Bellows Expansion Joint / Rotating Flange
Axial metal bellows expansion joints with rotating flanges absorb thermal expansion and allow easy alignment of bolt holes.
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Axial Metal Bellows Expansion Joint / Welding Neck
Axial metal bellows expansion joints with welding necks are welded directly into the pipeline to absorb axial thermal expansion.
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Axial Metal Bellows Expansion Joint / Fixed Flange
Axial metal bellows expansion joints with fixed flanges absorb axial thermal expansion in steam, hot water and process lines.
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Vibration Absorber Metal Expansion Joints
Vibration absorber metal expansion joints prevent vibration from pumps, compressors and chillers from passing into the pipeline.
Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.