China Spiral Wound Gaskets Manufacturer for Custom OEM and Wholesale Export

About Spiral Wound Gaskets

In the demanding world of industrial sealing, reliability is non-negotiable. Spiral wound gaskets stand as a cornerstone technology, engineered to create a robust, pressure-adaptive seal between two flanges. As a premier manufacturer, Kaxite Sealing has dedicated decades to refining this essential component. Our gaskets are meticulously constructed by winding a pre-formed metal strip (the winding) and a soft filler material in a V-shaped spiral around a central metal ring. This unique construction combines the spring-like resilience of metal with the conformability of the filler, creating a seal that performs exceptionally under varying pressures, temperatures, and thermal cycling conditions. They are the go-to solution for a vast array of critical applications, from oil and gas pipelines and chemical processing plants to power generation and marine engineering.

Kaxite Sealing's expertise ensures that every spiral wound gasket we produce is not just a part, but a precision-engineered sealing system. We understand that the integrity of your entire operation can hinge on the performance of a single gasket. Therefore, we focus on superior material selection, controlled manufacturing tolerances, and rigorous quality testing to deliver products that meet the highest international standards, including ASME B16.20, API 6A, and DIN EN 1514-2.

Key Product Parameters and Specifications

Selecting the correct spiral wound gasket requires careful consideration of several critical parameters. At Kaxite Sealing, we provide complete transparency and technical support to ensure you specify the ideal gasket for your service conditions.

1. Construction & Materials

The performance of a spiral wound gasket is directly determined by its material composition. We offer a wide range of standard and exotic materials.

• Windings (Metal Strip): Provides structural strength and spring-back.
  • 304/304L Stainless Steel: General corrosion resistance.
  • 316/316L Stainless Steel: Enhanced resistance to chlorides and acids.
  • 321 Stainless Steel: For high-temperature services.
  • Alloy 20: Excellent resistance to sulfuric acid.
  • Monel: Superior resistance to hydrofluoric acid and seawater.
  • Inconel 600/625: For extreme temperatures and corrosive environments.
  • Titanium: For chlorides, nitric acid, and oxidizing media.
  • Carbon Steel: For non-corrosive, high-temperature services.
• Filler Materials: Provides the initial seal and conforms to flange surfaces.
  • Flexible Graphite: Excellent thermal stability, chemical resistance, and performance across a wide temperature range (-240°C to 3000°F in inert atmospheres).
  • PTFE (Teflon): Outstanding chemical inertness, suitable for aggressive chemicals up to 260°C (500°F).
  • Mica-Graphite: For high-temperature, high-pressure steam services.
  • Ceramic Fiber: For extremely high-temperature applications.
  • Non-Asbestos Organic Fibers: For general purpose, lower-temperature services.
• Inner & Outer Rings: Guide the gasket during installation and provide additional protection.
  • Inner Ring (Centering Ring): Prevents winding from buckling into the pipeline, guides installation. Often made of carbon steel.
  Outer Ring (Guide Ring): Provides radial stability, aids in centering, and acts as a compression stop. Typically made of carbon steel or a material matching the winding.

2. Standard Sizes, Pressure Classes, and Dimensions

Kaxite Sealing spiral wound gaskets are manufactured to fit all standard and many custom flange specifications. The dimensions are strictly controlled to ensure a perfect fit.

3. Performance Data

Spiral Wound Gaskets: Frequently Asked Questions (FAQ)

Q: What are the primary advantages of using a spiral wound gasket over other gasket types like sheet gaskets or ring joint gaskets?

A: Spiral wound gaskets offer a unique combination of resilience, reliability, and versatility. Their key advantages include: Excellent Spring-Back: The spiral wound design acts like a spring, allowing the gasket to maintain sealing force during thermal cycling, vibration, and pressure fluctuations, preventing leakage. Wide Service Range: By combining different metals and fillers, they can be tailored for extreme temperatures (cryogenic to very high), high pressures, and aggressive chemicals. Stress Relief: They are less sensitive to flange rotation and misalignment compared to solid metal gaskets. Bolt Load Optimization: They require lower bolt loads to achieve a seal compared to solid flat metal gaskets, reducing stress on flanges and bolts. Proven Reliability: They are the most widely used gasket type in critical refinery, petrochemical, and power applications worldwide.

Q: How do I select the correct material combination (winding and filler) for my application?

A: Material selection is a three-step process focused on service conditions: First, identify the Fluid Media (chemical composition, pH, presence of solvents). This primarily dictates the filler material (e.g., PTFE for most chemicals, Graphite for high temperatures but avoid strong oxidizers). Second, determine the Operating Temperature and Pressure. This influences both filler and metal selection (e.g., Inconel for high heat, thicker windings for higher pressure). Third, consider Special Conditions like thermal cycling, vibration, or vacuum service. Kaxite Sealing provides detailed chemical compatibility charts and expert engineering support to guide this critical selection. Always consult the latest standards (ASME, API) and our technical team for final approval.

Q: What is the purpose of the inner and outer rings on a spiral wound gasket?

A: The rings serve distinct, crucial functions. The Inner Ring (or Centering Ring) has two main jobs: it prevents the soft, wound spiral from being eroded or blown into the pipeline by high-velocity flow, and it helps center the gasket inside the bolt circle during installation. The Outer Ring (or Guide Ring) provides radial stability to prevent the winding from buckling under high bolt loads, acts as a compression stop to prevent over-compression and crushing of the winding, and makes handling and installation easier. For certain standards and services (like heat exchangers), gaskets may be supplied without an inner ring ("inner ring removed" style).

Q: Can Kaxite Sealing provide spiral wound gaskets for non-standard or custom flange dimensions?

A: Absolutely. While we maintain a vast inventory of gaskets for all standard flange dimensions and ratings, a significant part of our business is engineering and manufacturing custom spiral wound gaskets. We can produce gaskets for raised face, flat face, tongue-and-groove, and male-and-female flanges in virtually any size. We also specialize in gaskets for heat exchangers (ASME Section VIII, TEMA styles), large diameter pipelines, and specialized OEM equipment. Simply provide us with a detailed drawing, sketch with dimensions, or a sample of the old gasket, and our engineering team will manufacture a perfect replacement.

Q: What are the correct installation and bolt tightening procedures for spiral wound gaskets?

A: Proper installation is vital for performance. Follow these key steps: First, ensure flange faces are clean, undamaged, and aligned, with a finish between 125 and 500 microinches Ra (3.2 to 12.5 µm Ra). Second, never use adhesive or stick the gasket to the flange. Place it cleanly and centered. Third, use the correct bolt tightening sequence and torque. Always follow a cross-pattern tightening sequence (star pattern) in multiple progressive passes (e.g., 30%, 60%, 100% of final torque) to ensure even compression. The final torque value must be as specified by the flange designer or per ASME PCC-1 guidelines. Kaxite Sealing can provide recommended seating stress values for our gaskets upon request. Never re-use a spiral wound gasket that has been compressed in service.

Q: How does Kaxite Sealing ensure the quality and traceability of its spiral wound gaskets?

A> At Kaxite Sealing, quality is integrated into every step. Our manufacturing process uses certified raw materials, with mill test reports available. Each production batch is controlled for winding density, layer count, and dimensions. Our final inspection includes visual checks, dimensional verification per ASME B16.20 or customer drawings, and material identification. For critical applications, we provide full material traceability and can supply gaskets with unique heat numbers. Our quality management system is certified to international standards, ensuring consistent, reliable performance in every gasket that bears the Kaxite Sealing name.