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Convoluted PTFE Expansion Joint for Chemical and Pharmaceutical Pipeline Flexibility
This datasheet covers convoluted PTFE expansion joints with SS316 wire reinforcement and backing flanges for chemical resistance and multi-directional movement absorption in pharmaceutical, semiconductor, and chemical process piping.
| Parameter | Specification |
|---|---|
| Size Range | DN25 to DN300 (1" to 12") |
| Pressure Rating | PN10 / PN16 / Class 150 |
| Body Material | Virgin PTFE convoluted bellows with SS316 wire reinforcement |
| Flange Material | SS316 backing flanges with PTFE overflanged face |
| Temperature Range | -40°C to +180°C (PTFE limit) |
| Movement Capability | Axial: 15-40 mm; Lateral: 10-25 mm; Angular: 8-12° (size dependent) |
| End Connections | Flanged ASME B16.5 / BS EN 1092-1 with PTFE overflanged face |
| Features | Universal chemical resistance, FDA PTFE, vacuum rated, convoluted profile, SS316 flanges |
| Accessories | Limit rods, control units, protective shroud |
| Component | Material |
|---|---|
| PTFE Bellows | Virgin PTFE, isostatically moulded and sintered, convoluted profile for flexibility |
| Reinforcement | SS316 wire helix embedded in PTFE wall for vacuum and external pressure resistance |
| Flange Face | PTFE overflanged face extending beyond steel backing flange; no separate gasket required |
| Backing Flanges | SS316 slip-on or weld-neck backing flanges to retain PTFE overflange |
| Gasket | PTFE envelope or no gasket required due to overflanged integral seal |
| Limit Rods | SS316 threaded rods with nuts and washers for unrestrained installations |
| Test | Requirement |
|---|---|
| Test Standard | Hydrostatic 1.5x PN; vacuum 0.08 MPa without collapse |
| Certification | CE, FDA, ISO 9001 |
| Standard | Description |
|---|---|
| Design Standard | ISO 10628 / BS 6129 |
The PTFE Expansion Joint -- Convoluted PTFE SS316 Flanges 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.