Expansion Joint with Sandwich Flange
Short flexible pump-to-pipeline joint with sandwich flange, ID 100-1300mm, vacuum to 3MPa.
| Product Name | Expansion Joint with Sandwich Flange |
|---|---|
| Inner Diameter (ID) | 100-1300 mm |
| Length | 200-1000 mm |
| Working Pressure (WP) | -0.1 to 3 MPa |
| Flange Type | Sandwich flange |
| Application | Connects the dredge pump with the pipeline |
| Origin | China |
Specifications are supplied per order within the ranges shown. Send the flange drawing or the details of the section being replaced and the connection is machined to match.
Overview
This is the same short flexible joint used between a dredge pump and its pipeline, terminated in sandwich flanges. The hose body flexes to give extension and compression, taking up the gap between pipe runs and damping the vibration the pump generates. The sandwich flange is specified where the joint's wetted surfaces should be rubber rather than bare steel.
Who it is for
Dredger owners and pump packagers who want the pump connection's wetted surfaces rubber lined through the joint.
Key benefits
- Compensates for gaps between pipelines and takes up operating movement
- Vibration damping protects the pump and connected pipework
- Designed for conditions from vacuum through to high pressure
- Flexible body simplifies installation and maintenance
- Sandwich flanges keep the wetted joint surfaces rubber lined
What goes wrong without it
Bolting rigid pipework directly to a running pump puts pulsation straight into the mountings and the deck structure.
Pipe runs that do not meet exactly force on-site fabrication; a flexible joint absorbs the mismatch.
On the wetted joint face, bare steel erodes first and scraps a joint whose body is still sound.
Construction and technical features
- Short-length flexible rubber hose body
- Extension and compression capability for pipeline gap compensation
- Vibration damping during operation
- Vacuum to high-pressure design range
- Sandwich flanges at both ends
Quality control
- Raw material inspection on rubber compounds and reinforcement before use
- Dimensional check on bore, length and flange alignment
- Pressure testing to the specified vacuum or positive-pressure condition
- Third-party inspection can be arranged on request
Where it is used
- Dredge pump to pipeline connection where the joint face is exposed to slurry
- Suction-side connection under vacuum conditions
- Deck pipework requiring movement take-up
- Installations where joint weight is being kept down
Customisation
- Inner diameter 100-1300 mm, length 200-1000 mm
- Vacuum or pressure duty specified from -0.1 to 3 MPa
- Flange drilling matched to the pump and pipework connection
- Length set to the measured installation gap
How it compares
Functionally identical to the steel-flange expansion joint in bore range, length range and pressure band. The difference is at the joint: sandwich flanges rubber line the wetted surfaces, steel flanges give a hard machined sealing face for connections that are broken frequently.
Selection and use notes
- Measure the installed gap and expected movement before specifying the length
- Say whether the joint sits on the vacuum or the pressure side
- Torque evenly in a crossing pattern against the rubber-lined face
- Inspect the cover for cracking at shutdowns, as this section works continuously
Questions buyers ask
How does it differ from the steel flange expansion joint?
Same body, same bore and length ranges, same pressure band. The sandwich flange rubber lines the joint surfaces in contact with the medium.
What is the pressure range?
-0.1 to 3 MPa, so it covers vacuum through to high-pressure service.
What sizes do you supply?
Inner diameter 100-1300 mm and length 200-1000 mm.
What is it for?
Connecting the dredge pump with the pipeline, and joining pipelines on the deck, while compensating for gaps and damping vibration.
Can you match our flange drilling?
Yes. Send the flange drawing or details of the existing connection.
Is third-party inspection available?
Yes, on request an inspection agency can be invited.
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View specificationsNeed this section to bolt into what you already run?
Send the flange drawing, the bore and the working pressure. We will confirm the specification and the lead time.