Spiral wound gaskets manufactured from alternating layers of metallic winding material and soft filler, designed to provide reliable sealing for flanged piping and equipment connections across a wide range of pressure and temperature conditions.
A spiral wound gasket is a semi-metallic gasket consisting of alternating layers of a formed metallic winding strip and a softer filler material. The combination provides mechanical resilience together with effective sealing.
Spiral wound gaskets are widely used for sealing flanged connections in process piping, oil & gas, petrochemical, chemical, power generation and other industrial applications.
The gasket is selected according to the mating flange standard, nominal size, pressure class, facing, winding material and filler material.
Rhevon can source spiral wound gaskets according to applicable dimensional and material requirements, including requirements for ASME B16.20 flanged assemblies.
Semi-metallic gasket for flanged piping and equipment connections.
Spiral wound gaskets can be configured according to the required flange facing, winding material, filler and centering arrangement.
The metallic winding provides the primary structural resilience of the gasket. Different metallic materials can be selected according to temperature, corrosion and process requirements.
The filler occupies the spaces between the metallic windings and contributes to sealing performance. Filler selection depends on the operating temperature and chemical service.
Depending on the gasket configuration, inner and outer guide or centering rings can be provided to support installation, positioning and compression control.
Material combinations can be selected according to the operating temperature, pressure, process media and project specification.
| Component | Typical Material | Typical Application |
|---|---|---|
| Winding | SS304 | General Process Service |
| Winding | SS316 | Corrosive / Chemical Service |
| Filler | Flexible Graphite | General / High-Temperature Service |
| Filler | PTFE | Chemical / Corrosive Service |
Inner-ring, winding and outer guide-ring dimensions for Class 150 and Class 300 flange service.
Swipe horizontally to view every column.
| NPS | d1150/300(mm) | d2150/300(mm) | d3150/300(mm) | d4150(mm) | d4300(mm) |
|---|---|---|---|---|---|
| ½ | 14.22 | 19.05 | 31.75 | 47.75 | 54.10 |
| ¾ | 20.57 | 25.40 | 39.62 | 57.15 | 66.80 |
| 1 | 26.92 | 31.75 | 47.75 | 66.80 | 73.15 |
| 1 ¼ | 38.10 | 47.75 | 60.45 | 76.20 | 82.55 |
| 1 ½ | 44.45 | 54.10 | 69.85 | 85.85 | 95.25 |
| 2 | 55.63 | 69.85 | 85.85 | 104.90 | 111.25 |
| 2 ½ | 66.55 | 82.55 | 98.55 | 123.95 | 130.30 |
| 3 | 81.03 | 101.60 | 120.65 | 136.65 | 149.35 |
| 4 | 106.43 | 127.00 | 149.35 | 174.75 | 181.10 |
| 5 | 131.83 | 155.70 | 177.80 | 196.85 | 215.90 |
| 6 | 157.23 | 182.63 | 209.55 | 222.25 | 250.95 |
| 8 | 215.90 | 233.43 | 263.65 | 279.40 | 308.10 |
Nominal winding thickness t is 4.50 mm; ring thickness is approximately 3.20 mm. Confirm the ordered construction and supplier drawing.
NPS 3 1/2 is not tabulated in this reference series and requires a confirmed supplier drawing.
Gasket requirements can be reviewed against the applicable gasket standard, flange dimensions, winding material, filler, pressure class and purchase order requirements before supply.
Common questions about spiral wound gasket construction, materials, flange compatibility and applications.
A spiral wound gasket is a semi-metallic gasket made by winding alternating layers of metallic strip and filler material. It is used primarily for sealing flanged connections in industrial piping and equipment.
Common winding materials include stainless steels such as SS304 and SS316. Flexible graphite is a widely used filler, while PTFE and other filler materials may be selected for specific chemical or service requirements.
Spiral wound gasket selection depends on the flange facing and piping specification. They are commonly supplied for compatible raised-face and other specified flange arrangements, with the gasket dimensions matched to the applicable flange standard.
Provide the NPS, pressure class, flange facing, gasket type, winding material, filler material, quantity and applicable standard. A flange specification, gasket drawing or existing gasket identification can also help confirm the correct configuration.
Yes. Spiral wound gaskets can be included in a mixed piping requirement together with compatible flanges, studs, nuts, washers and other piping components. This allows the complete flange-joint requirement to be sourced together.
Share the NPS, pressure class, facing, winding material, filler, quantity and applicable specification. Mixed piping component requirements are also welcome.
