PipingFitting.com supplies expansion joints and compensators for thermal movement, vibration isolation and misalignment in industrial piping. Both rubber expansion joints and metal bellows expansion joints are available as standard sizes or custom built to the required bore, face-to-face length, flange standard and movement.
Types of expansion joint
Rubber expansion joints
- Single-sphere and multi-sphere bodies with fabric reinforcement
- Flanged, threaded or grooved end connections
- Tie rods, limit rods or control rods for pressure thrust restraint
- EPDM, NBR, neoprene or PTFE-lined body for water, oil, chemical and HVAC duty
Metal bellows expansion joints
- Axial, lateral, angular and universal configurations
- Stainless steel bellows (304, 316L, 321) with carbon or stainless flanges
- Internal sleeve and external cover options to protect the bellows from flow and mechanical damage
- Single-ply and multi-ply bellows for higher pressure and fatigue life
Movement and design data we need
An expansion joint is selected by movement, not by size alone. Send the design movement or the piping layout and we will confirm the bellows or rubber body that meets it within the available installation length.
| Parameter | What to specify |
|---|---|
| Nominal bore | DN25 – DN3000 depending on type and pressure class |
| Design pressure | Typically PN10 / PN16 for rubber joints; higher on request for metal bellows |
| Design temperature | Rubber body limits depend on elastomer; metal bellows for high-temperature service |
| Movement required | Axial, lateral, angular or combined – the total travel to be absorbed |
| Face-to-face length | Fixed by the installation; we build to the drawing where a standard length does not fit |
| End connection | Flange standard and drilling (EN1092, ASME B16.5, JIS, GB), threaded, grooved or weld end |
Custom expansion joints
- Built to the installation length – where the space between anchors is not a catalogue dimension
- Flange drilling to your standard – EN, ASME, JIS or GB bolt patterns
- Elastomer selection – EPDM, NBR, neoprene or PTFE-lined for the actual medium
- Bellows material and ply – 304, 316L, 321, or higher-alloy on request
- Tie rod and limit rod packages – sized for the pressure thrust of the line
- OEM marking and tagging – project tag numbers, line numbers and shipping marks
Applications
- Pump suction and discharge lines – vibration and misalignment isolation
- HVAC and district heating – thermal movement in long runs
- Water treatment and wastewater – rubber joints for aggressive media
- Chemical and petrochemical piping – lined and stainless options
- Power generation – metal bellows at boiler, turbine and condenser connections
- Marine and offshore – movement at hull and equipment interfaces
Frequently asked questions
How do I choose between rubber and metal expansion joints?
Rubber joints suit lower temperature and moderate pressure where vibration and misalignment dominate. Metal bellows suit higher temperature, higher pressure and larger movement. Send the pressure, temperature, medium and movement and we will confirm which type fits the line.
Can you replace a joint that has no nameplate?
Yes. Send the face-to-face length, bore, flange drilling, number of bolt holes and a photo of the failed joint. We match the interface dimensions so the replacement drops into the existing gap.
Send your drawing or specification and we will confirm the manufacturable details before quoting: Request a quotation · email info@pipingfitting.com · WhatsApp +86 19833770783.