Basic Type (Winding Only)
Consists of the spiral winding element only — no inner or outer ring. Designed for male–female and tongue-and-groove flanges, typically in smaller sizes and lower pressure ratings.
A semi-metallic sealing solution built by alternately winding a V-shaped metal strip with a soft filler. Engineered for Class 150–2500 flanges and temperatures from −200 °C to 1000 °C — trusted in refineries, power plants, chemical and LNG facilities.
The correct type depends on your flange design, pressure class and service conditions. Below are the six standard configurations supplied as standard or made to order.
Consists of the spiral winding element only — no inner or outer ring. Designed for male–female and tongue-and-groove flanges, typically in smaller sizes and lower pressure ratings.
The outer centering ring aligns the gasket on the bolt circle and prevents blowout. This is the most widely used type for raised face flanges and general industrial service.
The inner ring acts as a compression stopper, reduces turbulence and filler erosion, and improves stability. Preferred for high-pressure, high-temperature and vacuum service.
Custom shapes and dimensions engineered to match heat exchanger shells, channels and tube-sheet flanges in petrochemical and refinery units.
Manufactured with high-purity materials under strict quality control and full traceability, for nuclear power plant applications where reliability is absolutely critical.
Oval, rectangular, square, obround and other custom geometries for non-standard flange connections, manways and special equipment.
| Type | Structure | Flange Face | Typical Service |
|---|---|---|---|
| Basic Type | Winding only | Male–female / Tongue-and-groove | Small size, low pressure |
| With Outer Ring | Winding + outer ring | Raised face | General purpose, most common |
| With Inner & Outer Ring | Winding + inner + outer ring | Raised face | High pressure, high temperature, vacuum |
| Heat Exchanger Type | Custom geometry | Exchanger flanges | Refinery & petrochemical units |
| Nuclear Grade | High-purity materials | Nuclear service flanges | Nuclear power plants |
| Non-Round Type | Oval / rectangular / square | Non-standard flanges | Special equipment connections |
Material selection defines the operating envelope of the gasket. The metal strip provides strength and elastic recovery; the filler provides sealing ability. Match both to your medium, pressure and temperature.
| Medium / Condition | Recommended Metal Strip | Recommended Filler |
|---|---|---|
| Water, steam, oil | SS304, SS316 | Graphite |
| Acid, alkali, solvent | SS316L, Hastelloy | PTFE |
| High temperature | SS321, Inconel | Ceramic, Mica |
| Cryogenic service | SS304, SS316 | PTFE, Graphite |
| General purpose | SS304, SS316 | Non-asbestos |
Standard and custom specifications available. If you are unsure which combination fits your application, our engineering team can recommend the right configuration based on your medium, pressure and temperature.
| Item | Details |
|---|---|
| Product Name | Spiral Wound Gasket |
| Standards | ASME B16.20, API 601, DIN 2699, EN 1514-2, JIS B 2404 |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 |
| Temperature Range | −200 °C to 1000 °C (depending on filler) |
| Metal Strip | SS304, SS316, SS316L, SS321, Monel, Inconel, Hastelloy |
| Filler Material | Graphite, PTFE, Ceramic, Mica, Non-asbestos |
| Outer Ring | Carbon Steel, SS304, SS316 |
| Inner Ring | SS304, SS316, SS316L |
| Thickness | 3.2 mm, 4.5 mm, 6.4 mm, or customized |
| Size Range | 1/2" to 60", DN15 to DN1500 |
| Surface Finish | Plain, zinc plated, polished |
| Packing | Wooden case, carton, pallet |
Spiral wound gaskets are found in almost every industry that handles fluids under pressure, temperature or corrosive attack.
Refinery pipelines, drilling equipment and transmission lines.
Reactors, heat exchangers and process piping.
Steam turbines, boilers and condensers.
Acid, alkali and solvent lines requiring corrosion resistance.
Clean steam and hygienic process lines.
Engine rooms and fuel systems.
LNG, liquid oxygen and liquid nitrogen service.
Common technical and purchasing questions from engineers and buyers.
Spiral wound gaskets are semi-metallic, using a spiral winding with filler, and are used on raised face flanges. Ring joint gaskets are solid metal rings for RTJ flanges under high pressure. They serve different flange types and pressure ranges.
It depends on the filler: graphite up to 450 °C in oxidizing atmospheres and 1000 °C in inert ones; PTFE up to 260 °C; ceramic up to 1000 °C; mica up to 900 °C.
No. They are designed for single use. Reusing a spiral wound gasket may cause leakage and safety risks.
SS316 has better corrosion resistance than SS304, especially in chloride and acid environments. It is often preferred for chemical and marine applications.
An inner ring is recommended for high pressure, high temperature and vacuum service. An outer ring is used for raised face flange centering. Ring material should match or be compatible with the flange material.
Standard sizes ship in 3–7 days; custom sizes take 7–15 days. MOQ is flexible and small trial orders are accepted. Free samples are available for standard sizes.
Send us your flange standard and size, pressure rating, temperature, medium, metal strip and filler material, ring requirements and quantity. We will reply within 24 hours with price, lead time and a technical recommendation.
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