Ferrobend Spiral Wound Gaskets with Inner and Outer Ring provide maximum sealing performance for critical industrial services. The dual-ring construction improves centering, prevents over-compression, protects the sealing element, and enhances stability under extreme pressure and temperature conditions.
ASME B16.20
150–2500
Material Dependent
Raised Face
½"–60"
Dual Ring
This premium spiral wound gasket combines an inner ring and an outer guide ring to provide superior sealing performance in severe operating conditions. The dual-ring design improves mechanical strength, sealing efficiency, and operational safety.
The inner ring protects the winding from turbulence, erosion, and excessive compression while reducing buckling under high pressure. The outer ring ensures accurate flange centering and controls gasket compression during installation.
Ferrobend manufactures Inner & Outer Ring Spiral Wound Gaskets using premium stainless steels, nickel alloys, and high-performance fillers for demanding applications in refineries, petrochemical plants, offshore platforms, power generation, LNG facilities, and chemical processing industries.
The dual-ring spiral wound gasket is engineered for critical operating conditions where maximum sealing integrity, mechanical strength, and long-term reliability are essential.
Precision-formed V-shaped metallic winding combined with resilient filler materials provides excellent elasticity, recovery, and sealing efficiency under fluctuating operating conditions.
The outer ring accurately centers the gasket within raised face flanges, protects the sealing element during handling, and acts as a compression stop during bolt tightening.
The inner ring provides additional radial support, minimizes turbulence, prevents inward buckling of the winding, and protects the sealing element against process media erosion.
The combination of inner and outer rings delivers superior structural stability, improved blowout resistance, and longer operational service life.
| Property | Description |
|---|---|
| Product Type | Spiral Wound Gasket with Inner & Outer Ring |
| Construction | Dual Ring Semi-Metallic Design |
| Pressure Class | 150 to 2500 |
| Temperature Range | Dependent on selected metal and filler materials |
| Flange Type | Raised Face (RF) |
| Compression Control | Outer Ring |
| Bore Protection | Inner Ring |
| Service | Critical High Pressure Applications |
Dual-ring construction for maximum sealing reliability
Prevents inward buckling of the sealing element
Excellent blowout resistance under severe pressure
Improved protection against process media erosion
Accurate flange centering and controlled compression
Recommended for critical and fire-safe industrial services
Manufactured according to metallic gasket standards for industrial flange joints.
Suitable for raised face flange dimensions and pressure classes.
Recommended for refinery, petrochemical, and energy sector applications.
Available in international flange standards upon customer request.
Ferrobend Inner & Outer Ring Spiral Wound Gaskets are manufactured in accordance with international standards and are available in both standard and custom sizes for critical industrial applications.
Available for a wide range of flange sizes used throughout industrial piping systems.
Suitable for high-pressure industrial services requiring dependable sealing performance.
Designed primarily for raised face flanges used in severe operating conditions.
| Nominal Size | Pressure Class | Construction | Flange Type |
|---|---|---|---|
| ½" – 12" | 150 / 300 / 600 | Inner & Outer Ring | Raised Face |
| 14" – 24" | 150 / 300 / 600 / 900 | Dual Ring Construction | Raised Face |
| 26" – 60" | 150 / 300 / 600 / 1500 / 2500 | Heavy Duty Design | RF / Custom |
Precision spiral wound metallic strip with resilient filler designed for high-pressure flange joints.
Protects the winding from media erosion, improves bore stability, and prevents buckling during service.
Provides accurate centering, limits gasket compression, and protects the sealing element during installation.
Critical pressure vessels, heat exchangers, reactors, boilers, and refinery process equipment.
Suitable for elevated temperature applications when combined with the proper metal winding and filler material selection.
Designed for severe pressure conditions where long-term sealing integrity is essential.
Dual-ring construction improves structural stability and enhances operational safety in critical industrial services.
Maintains excellent recovery and sealing performance during repeated heating and cooling cycles.
High-pressure production systems, offshore platforms, and transmission pipelines.
Critical process units, reactors, distillation columns, and refinery equipment.
Steam turbines, boilers, superheaters, and high-pressure piping systems.
Aggressive chemical services requiring corrosion-resistant sealing materials.
Marine engines, offshore installations, and industrial vessel piping systems.
Ideal for severe temperature, pressure, cyclic loading, and fire-safe applications.
Proper installation ensures maximum sealing performance and extends the service life of Inner & Outer Ring Spiral Wound Gaskets.
Ensure flange faces are clean, parallel, and free from corrosion, scratches, or foreign particles before installing the gasket.
Place the gasket carefully between the flange faces. The outer ring should fit correctly inside the raised face while the inner ring aligns with the bore.
Apply bolt tightening using a recommended cross-pattern sequence to achieve uniform gasket compression.
Inspect flange alignment, bolt torque, and gasket positioning before placing the system into service.
Keep gaskets in their original protective packaging until installation to avoid mechanical damage.
Store in a cool, dry, and clean indoor environment away from moisture, chemicals, and direct sunlight.
Do not bend, twist, or stack heavy materials on top of the gasket during storage or transportation.
All metallic strips, rings, and filler materials are inspected before production.
Finished gaskets are verified against dimensional tolerances specified by international standards.
Mill Test Certificates (MTC) and inspection documents are available on request.
Every gasket undergoes final visual and dimensional inspection before dispatch.
| Inspection | Purpose |
|---|---|
| Visual Inspection | Verification of winding quality, ring finish, and workmanship. |
| Dimensional Inspection | Confirmation of gasket dimensions and manufacturing tolerances. |
| Material Verification | Validation of metallic winding, rings, and filler materials. |
| Documentation | Inspection reports and material certificates for customer requirements. |
The inner ring protects against inward buckling and media erosion, while the outer ring provides centering and compression control.
They are recommended for severe pressure, elevated temperature, cyclic loading, and critical process services.
Yes. Appropriate metallic winding and filler combinations allow their use in fire-safe applications where specified by design standards.
Yes. Ferrobend manufactures customized combinations of winding metals, filler materials, and rings according to customer requirements.
These gaskets are manufactured in accordance with ASME B16.20 and other applicable international standards.
Ferrobend engineers can recommend the ideal material combination and gasket configuration for your most demanding operating conditions.