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Moulded Single-Arch Rubber Expansion Joint for Pipeline Movement and Vibration Isolation
This datasheet covers single-arch moulded rubber expansion joints in EPDM or NBR with fabric and wire reinforcement for absorbing thermal expansion, vibration isolation, and misalignment in water, HVAC, and chemical pipelines.
| Parameter | Specification |
|---|---|
| Size Range | DN25 to DN600 (1" to 24") |
| Pressure Rating | PN10 / PN16 |
| Body Material | EPDM or NBR moulded rubber with nylon / polyester cord reinforcement |
| Reinforcement | Nylon or polyester tyre cord plies; steel wire helix for vacuum resistance |
| Flange Material | Integral rubber flange with steel backing ring (optional) |
| Temperature Range | EPDM: -40°C to +120°C; NBR: -30°C to +80°C |
| Movement Capability | Axial: 10-50 mm; Lateral: 10-30 mm; Angular: 10-15° (size dependent) |
| End Connections | Flanged BS EN 1092-1 PN10/16 or ASME B16.5 Class 150 with integral rubber flange face |
| Features | Single arch, multi-directional movement, vibration isolation, vacuum rated, integral flange face |
| Accessories | Limit rods, control units, tie rods for unrestrained installation |
| Component | Material |
|---|---|
| Rubber Body | EPDM or NBR compound, moulded with nylon / polyester cord reinforcement and wire helix |
| Cord Reinforcement | Nylon or polyester tyre cord plies (typically 2 to 6 plies depending on size and pressure) |
| Wire Helix | Carbon steel or SS304 wire helix embedded in rubber for vacuum and external pressure resistance |
| Flange Face | Integral moulded rubber flange face with raised sealing beads; no separate gasket required |
| Backing Ring | Carbon steel or SS304 split backing ring for high-pressure or vacuum service (optional) |
| Limit Rods | Carbon steel or SS304 threaded rods with nuts and washers to prevent over-extension |
| Test | Requirement |
|---|---|
| Test Standard | Hydrostatic 1.5x PN; vacuum 0.08 MPa without collapse |
| Certification | CE, ISO 9001, WRAS on request for potable water |
| Standard | Description |
|---|---|
| Design Standard | ISO 10628 / BS 6129 |
The Rubber Expansion Joint -- Single Arch EPDM NBR is designed, manufactured, and tested in accordance with applicable API / ASME / BS / ISO international standards. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is carbon steel, stainless steel (CF8 / CF8M), and special alloy grades. Alternative and upgraded grades -- Duplex, Super Duplex, Inconel, Monel, Hastelloy, and NACE MR0175 trims for sour service -- are available on request.
It is offered in a range of sizes as per the technical specification with standard ANSI / ASME pressure classes (PN ratings on request). End connections include flanged (RF / RTJ), butt-weld, socket-weld, and screwed ends as per specification.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.