Spiral Wound
Gasket Manufacturer
At Steel Icon Stainless Pvt. Ltd., we are a trusted manufacturer of Spiral Wound Gaskets, engineered for high-pressure, high-temperature, and chemically aggressive applications. These gaskets are constructed using a precision-wound V-shaped metallic strip alternating with soft filler materials, delivering exceptional resilience, sealing efficiency, and thermal stability.
Spiral wound gaskets are widely used across refineries, petrochemical complexes, offshore platforms, boiler systems, power plants, and chemical reactors, where leak-proof operation is critical. Their ability to recover under mechanical stress and thermal cycling makes them one of the most preferred sealing solutions worldwide.
Why Choose Spiral Wound Gaskets?
- Designed for pressures up to 250 bar and temperatures up to 1000°C
- Available in styles CGI, R, RIR for different flange types and conditions
- Exceptional chemical, heat, and pressure resistance
- Conforms to ASME B16.20, DIN, BS, and API standards
- Compatible with raised face, flat face, and tongue-and-groove flanges
- Available with inner and outer guide rings for blowout prevention
| Products |
|---|
|
Stainless Steel Bar |
|
Fasteners |
|
Forged Products |
|
Flanges |
|
Forged Fittings |
|
Stainless Steel Billets |
|
Round Corner Square Billets |
|
Stainless Steel Pipes |
|
Pipe Fittings |
|
Valve |
Specification Chart
| Property | Specification |
|---|---|
|
Standard Sizes |
½” to 60” (custom sizes also available) |
|
Thickness |
3.2mm (Standard) / 4.5mm / 6.5mm |
|
Pressure Rating |
Up to 250 bar (Class 150–2500 ANSI) |
|
Temperature Range |
–200°C to +1000°C (depending on material) |
|
Gasket Types |
Spiral Wound R, RIR, CGI, CG |
|
Standards |
ASME B16.20, API 601, DIN 2699, EN 1514 |
|
Inner/Outer Ring Materials |
Carbon Steel, SS 304, SS 316, Inconel, Monel |
|
Filler Material Options |
Graphite, PTFE, Mica |
Chemical Composition (Common Materials)
| Material | Cr (%) | Ni (%) | Mo (%) | Fe (%) | Others |
|---|---|---|---|---|---|
|
SS 304 |
18–20 |
8–10.5
|
– |
Balance |
Mn, Si, C |
|
SS 316 |
16–18 |
10–14 |
2–3 |
Balance |
Mn, Si, C |
|
Inconel 625 |
20–23 |
≥58 |
8–10 |
≤5 |
Nb, Co, Fe |
|
Monel 400 |
≤2.5 |
≤1.5 |
– |
Balance |
Cu (≥63%), Fe |
Filler materials such as graphite and PTFE are chemically inert and resistant to most industrial fluids.
Mechanical Properties
| Property | SS 304 Strip | SS 316 Strip | Graphite Filler |
|---|---|---|---|
|
Tensile Strength |
≥ 520 MPa |
≥ 515 MPa |
5–20 MPa (compressible) |
|
Yield Strength |
≥ 205 MPa |
≥ 205 MPa |
— |
|
Elongation |
≥ 40% |
≥ 40% |
— |
|
Hardness (HRB) |
≤ 95 |
≤ 95 |
— |
|
Compression Ratio |
— |
— |
40% to 50% |
|
Recovery |
— |
— |
15% to 30% |
Types of Spiral Wound Gaskets
- Style R (Basic Type) – Metallic spiral without any rings, used in tongue-and-groove flanges.
- Style RIR (Inner Ring) – Features a solid inner ring to reinforce inside diameter; prevents inward buckling.
- Style CGI (Inner & Outer Rings) – Most commonly used style, provides strength and centering features; suitable for raised face flanges.
- Style CG (Outer Ring Only) – Used when only flange centering and compression limitation are required.
Applications
Our spiral wound gaskets are trusted across industries where safety, sealing reliability, and thermal endurance are essential:
- Oil & Gas Industry – Used in flanged joints of pipelines, valves, and pressure vessels.
- Boiler & Steam Systems – Maintains seal under extreme temperature and pressure fluctuations.
- Chemical Processing Plants – Seals aggressive chemical media and reactive fluids.
- Power Generation – Used in turbine casings, condensers, and heat recovery units.
- Refineries & Petrochemicals – Resistant to hydrocarbons, sulfur compounds, and extreme heat cycles.
Key Benefits
- Multi-layered construction ensures superior recovery and compressibility
- Supports wide pressure classes (150–2500 lb) and gasket seating stress requirements
- No leakage under bolt load variations or thermal expansions
- Compatible with aggressive chemical and thermal environments
- Custom engineered for exotic alloys, sizes, and pressure ratings
Frequently Asked Questions
Explore our FAQs for insights on materials, customization, and delivery.
Can spiral wound gaskets be reused?
No. Once compressed and exposed to service, these gaskets must be replaced to ensure sealing integrity.
How do I choose between graphite and PTFE filler?
- Graphite: High temp, steam, hydrocarbons
- PTFE: Chemical resistance, non-stick surfaces, low-temp use
What’s the function of inner and outer rings?
- Inner Ring: Prevents inward buckling, enhances blowout safety
- Outer Ring: Provides centering and limits over-compression
Are custom standards and shapes available?
Yes. We manufacture non-standard sizes, oval shapes, and special metals upon request.
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