Rubber Expansion Joints - Pumps, Valves, Piping and Fittings
Rubber expansion joints are flexible connectors installed in marine pump, valve, and piping systems to absorb thermal movement, vibration, misalignment, and pressure pulsation. They are available as single-sphere, twin-sphere, spool-type, and eccentric-reducer designs with flanged ends.
ProShipWorks provides end-to-end support to source and supply Rubber Expansion Joints for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Rubber Expansion Joints |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 656 |
| Brands / Manufacturers | Proco Products, Metraflex, Trelleborg |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Vibration and noise isolation |
| 2. Absorption of thermal and axial movement |
| 3. Compensation for limited pipe misalignment |
| 4. Resistant rubber lining options for seawater, oil, chemicals, or cooling water |
| 5. Available with drilled flanges, floating flanges, or integral rubber flanges |
Applications of Rubber Expansion Joints
| Application |
|---|
| 1. Sea-water cooling and ballast piping |
| 2. Fire-main, bilge, ballast, and general service systems |
| 3. Pump suction and discharge connections |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| Series 230 Single Sphere Rubber Expansion Joint | Proco Products |
| Series 240 Twin Sphere Rubber Expansion Joint | Proco Products |
| Series 100 Rubber Expansion Joint | Metraflex |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| Single-sphere rubber expansion joint | Construction | Molded elastomeric body with reinforcing plies and flanged ends | — |
| Twin-sphere rubber expansion joint | Movement capability | Higher movement absorption than single-sphere construction | — |
| Marine rubber expansion joint | Common elastomers | EPDM, NBR, neoprene, or natural rubber, selected for service medium | — |
| Marine rubber expansion joint | End connection | Drilled or floating flanges to specified piping standard | — |
| Marine rubber expansion joint | Pressure and temperature rating | Dependent on diameter, elastomer, reinforcement, and manufacturer data | — |
Standards, Certifications & Class Approval
Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.
| Applicable Standards & Certification | Flange drilling may comply with EN 1092-1, ASME B16.5, JIS B 2211, or other specified standards. Material and pressure ratings must follow the manufacturer's certified data. EJMA applies primarily to metallic expansion joints and is not generally the governing standard for rubber joints. |
|---|---|
| Class Approval | Classification acceptance or type approval may be available from DNV, ABS, Lloyd's Register, Bureau Veritas, or ClassNK depending on manufacturer, service, size, and vessel requirements. Approval should be verified for the specific product and installation. |
Installation, Maintenance & Safety Information
| Installation Notes | Confirm elastomer, pressure, temperature, movement, vacuum, and flange rating before installation. Align piping accurately, install guides and anchors where required, avoid torsion, and tighten bolts evenly using the manufacturer's sequence and torque. Do not use the joint to correct major pipe misalignment. |
|---|---|
| Maintenance Tips | Inspect periodically for cracking, blistering, bulging, abrasion, leakage, flange-bolt loosening, and corrosion. Check for excessive movement and support or guide damage. Replace the joint if reinforcement is exposed, permanent deformation occurs, or deterioration affects pressure integrity. |
| Safety Notes | Isolate, depressurize, drain, and cool the system before inspection or replacement. Never exceed the rated pressure, temperature, vacuum, or movement limits. Protect rubber from hot surfaces, welding sparks, oils or chemicals incompatible with the elastomer, and sudden pressure surges. |
Request a Quote for Rubber Expansion Joints
Contact ProShipWorks for marine or industrial product sourcing, quotations and delivery.
- Vessel name and IMO number
- ETA / vessel schedule
- Berth or vessel location
- Required quantity
- Preferred delivery window
- Shipping agent contact details
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