Hongze Valve
One-Stop Supplier for Rubber Joints, Bellows, and Waterproof Casings
Sleeve Expansion Joint
Sleeve Expansion Joints, also known as sleeve-type expansion joints or axial sleeve compensators, are engineered to absorb axial movement and thermal expansion in pipelines without transferring thrust forces to adjacent equipment or structures. Featuring a robust steel sleeve structure and precision sealing design, these expansion joints offer reliable compensation for pipeline movement and prevent leaks under high pressure.
Sleeve expansion joints are widely used in water supply systems, municipal pipelines, heating networks, power plants, and industrial piping where fixed anchors are difficult to install or where large axial movement needs to be accommodated.
These joints provide long-term durability, low maintenance, and superior performance in both aboveground and underground installations.
Key Features
Technical Specifications
| Nominal Diameter (DN) | Length (mm) | Outer Diameter (mm) | Bellows Thickness (mm) | Axial Movement (mm) | Lateral Movement (mm) | Angular Movement (°) | Flange Thickness (mm) | Bolt Qty |
|---|
| DN100 | 600 | 210 | 1.5 | ±25 | ±15 | 3° | 16 | 8 |
| DN200 | 700 | 320 | 2.0 | ±30 | ±20 | 4° | 18 | 12 |
| DN400 | 850 | 540 | 2.5 | ±40 | ±25 | 5° | 20 | 16 |
| DN600 | 1000 | 770 | 3.0 | ±50 | ±30 | 5° | 22 | 20 |
| DN800 | 1200 | 990 | 3.5 | ±60 | ±35 | 6° | 25 |
| Parameter | Unit | Value |
|---|
| Working Pressure | MPa | 0.1 ~ 2.5 |
| Burst Pressure | MPa | ≥1.5×Working Pressure |
| Temperature Range | °C | -30 ~ 450°C |
| Thrust Absorption | – | Integrated (no external anchors needed) |
| Medium Compatibility | – | Hot air, steam, exhaust gas, liquids |
| Bellows Material | – | Stainless Steel (304/316L/321) |
| Component | Material Options |
|---|
| Bellows | Stainless Steel (304, 316L, 321) |
| Internal Sleeve | Stainless Steel, Carbon Steel (optional) |
| Outer Shell/Guide | Carbon Steel (painted or galvanized), Stainless Steel |
| Tie Rods | Carbon Steel (galvanized), Stainless Steel |
| Flanges | Carbon Steel, Stainless Steel |
| Bolts & Nuts | Carbon Steel (galvanized), Stainless Steel |
Check bellows for damages and alignment before installation.
Mount flanges to piping flanges evenly with gasket material.
Avoid applying excessive torque to bolts to prevent bellows distortion.
Ensure freedom of movement by not restricting joint’s expansion capabilities.
No additional anchors required due to thrust-free design.
Inspect periodically (every 6-12 months) for leakage or damage.
Check alignment and bellows condition regularly.
Ensure bellows are clean and free from obstructions.
Replace the expansion joint immediately if significant wear or deformation is detected.
No regular lubrication required due to maintenance-free bellows design.
What is the function of a sleeve expansion joint?
Sleeve expansion joints absorb axial movement and thermal expansion in pipelines, preventing damage and reducing stress on pipes and adjacent equipment. They are especially useful in long pipeline systems or where fixed anchors cannot be installed.
In which applications are sleeve-type expansion joints most commonly used?
They are widely used in water supply and drainage systems, district heating pipelines, power plants, municipal water projects, and industrial piping networks.
What are the advantages of using a sleeve expansion joint?
Key advantages include high compensation for axial movement, robust sealing, low friction, minimal maintenance, and suitability for high-pressure and large-diameter pipelines.
Can sleeve expansion joints be customized for specific project requirements?
Yes, we offer OEM and ODM customization. You can specify sizes, materials, pressure ratings, flange standards, and special sealing structures to meet your project needs.
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