Spiral Wound Gasket

A Spiral Wound Gasket (SPW) is a high-performance semi-metallic sealing component engineered for industrial piping systems where a standard gasket would fail. It is the primary choice for high-pressure, high-temperature, and corrosive environments, providing a robust seal that adapts to fluctuating operating conditions.

The unique performance of an SWG comes from its composite construction:

• Metallic Winding: A pre-formed V-shaped metal strip (commonly Stainless Steel 316L or specialty alloys) provides structural strength and mechanical resilience.
• Soft Filler Material: Alternating layers of soft materials such as Flexible Graphite, PTFE, or Mica are wound with the metal to fill flange irregularities and ensure a gas-tight seal.

This specialized “V-shape” design allows the gasket to act like a heavy-duty spring, creating a dynamic seal with high elastic recovery. This ensures that even if the flange moves due to thermal expansion or vibration, the spiral wound gasket maintains constant tension against the flange faces to prevent leakage.

• Medium pressure and temperature applications.
• Pumps, valves, vessels, and general industrial joints.
  
• Cost-effective choice for automotive and plumbing sectors.
• Highly versatile with multiple metal and filler combinations.
• Reliable sealing for standard, non-extreme applications.
  
• Simple, economical design for routine maintenance needs.

 Includes both centering and inner rings for maximum support and alignment. Ideal for high-pressure, high-temperature applications.

• Solid metallic inner & outer ring
• Suitable for high-pressure and temperature applications
• Standard spiral wound gasket for raised face applications
• Effectively reduces fluid turbulence and flange erosion, protecting the sealing surface.
• Minimizes gasket damage by shielding the bore and inner windings from wear and tear.
• Wide choice of materials for filler and metal strip
• Versatile sealing solution for both standard operations and highly critical industrial environments.

Features a centering ring for proper alignment. Suitable for medium pressure and temperature in HVAC, automotive, and general industries.

• Solid metallic outer ring used as a centering device and compression stop
• Used mainly on raised-face and flat-face flanges
• Wide choice of materials for filler and metal strip
• Type CG gasket has a centering ring for alignment and prevents shifting.
• Suitable for medium pressures and temperatures in automotive, HVAC, and plumbing.

The gasket is made solely of the V-shaped metal winding and a non-metallic filler material (such as graphite or PTFE).

• Consists only of the spiral wound sealing element (no inner or outer rings)
  
• Relies on the compression of the spiral windings to fill flange face irregularities.
• Used exclusively with flanges that provide their own centering mechanism.
• Ideal for tongue and groove or male-to-female flanges in vessels, valves, and pumps.
• Not suitable for raised-face or flat-face flanges due to the lack of a centering or compression stop ring.

Selecting the right spiral wound gasket manufacturer directly impacts plant safety, operational efficiency, and maintenance costs. At Asian Sealing Products, we deliver precision-engineered sealing solutions trusted by industries where performance and reliability are critical.

1. Advanced Precision Winding Technology

We utilize automated winding systems to achieve uniform winding density and precise metal-to-filler ratios. This ensures optimal “spring-back” action, allowing the gasket to maintain a consistent, leak-tight seal even under thermal cycling and pressure fluctuations.

2. Premium Materials with Full Traceability

Our gaskets are manufactured using certified corrosion-resistant alloys such as SS316L, Inconel, Monel, and Hastelloy, combined with high-purity fillers like Graphite, PTFE, and Ceramic Fiber. Complete material traceability ensures reliability in critical applications across oil & gas, power, and chemical industries.

3. Compliance with Global Standards

All spiral wound gaskets are produced in accordance with ASME B16.20, API, and DIN standards. Each product undergoes stringent quality checks, dimensional inspections, and compression testing, with Material Test Certificates (MTCs) provided for full compliance and assurance.

4. Fast Delivery & Technical Support

We understand the cost of downtime. Our streamlined production and logistics ensure quick turnaround times and dependable delivery. Our experienced technical team also supports custom gasket design for non-standard flanges and specialized operating conditions.

At Asian Sealing Products, our spiral wound gaskets are manufactured in strict compliance with global industry standards to ensure precision fit, safety, and reliable sealing performance across diverse industrial applications. Each gasket is designed to match specific flange standards, pressure classes, and operating conditions.

Below are the standards we comply with:

ASME Standards

• ASME B16.20
  Core standard for metallic gaskets, including spiral wound gaskets. Defines dimensions, materials, and performance requirements.
• ASME B16.5
  Covers pipe flanges from NPS ½ to 24. Our gaskets are fully compatible across all pressure classes.
• ASME B16.47 Series A (MSS SP-44)
  Designed for large-diameter, high-pressure flanges (NPS 26–60) with robust construction.
• ASME B16.47 Series B (API 605)
  Suitable for large-diameter, lower-pressure applications, with lighter flange designs.

British Standards (BS)

• BS 1569, BS 3274, BS 3381, BS 4504
  Cover flange dimensions and gasket compatibility. Our gaskets are manufactured to suit all applicable BS flange types.

European Standards (EN)

• EN 1092 (BS EN 1092)
  Specifies flanges for steel, cast iron, and copper alloys. We supply gaskets for all PN ratings.
• EN 1759 (BS EN 1759)
  Covers class-designated flanges used in industrial piping systems.

API Standards

• API 601
  Standard for metallic gaskets used in refinery and high-demand applications.
• API 605
  Relates to large-diameter flanges (aligned with ASME B16.47 Series B).

DIN Standards (Germany)

We manufacture spiral wound gaskets compatible with a wide range of DIN flange standards.
Exact DIN specification can be provided based on your requirement.

JIS Standards (Japan)

Custom gaskets are available to suit Japanese Industrial Standards (JIS) for various flange types and pressure ratings.

Indian Standards (IS)

• IS 7719 – General requirements for metallic gaskets
• IS 10864 – Specifications for spiral wound gaskets

Our products comply with both quality and performance benchmarks defined under IS standards.

AWWA Standards

We supply gaskets suitable for water and wastewater applications as per AWWA flange standards. Customization is available based on specific project requirements.

Other Recognized Standards

• MSS SP-44 – Steel pipe flanges (linked with ASME B16.47 Series A)
• BS 10 – Legacy British flange standard
• Taylor Forge – Custom gasket dimensions as per flange specifications
• TEMA – Gaskets suitable for heat exchanger applications

Custom Manufacturing Available

In addition to standard specifications, we also manufacture non-standard and custom spiral wound gaskets based on your exact flange drawings, dimensions, and operating conditions.

Every industrial application is different, and as such, we offer a wide range of customization options to meet the specific needs of our clients. These include:

• Material Selection: Choose from a wide range of metals (stainless steel, carbon steel, Monel, Inconel, etc.) and filler materials (graphite, PTFE, mica, ceramic, etc.) to suit the specific chemical, thermal, and pressure requirements of your application.
• Size and Thickness: Spiral Wound Gaskets are available in a variety of sizes and thicknesses, tailored to fit different flange dimensions and pressure ratings.
• Inner and Outer Diameters: Customizable diameters allow the gasket to fit perfectly within your system’s flange setup.

Special Designs: We can provide Spiral Wound Gaskets with additional design features, such as reinforcement rings, for specific high-pressure applications.

Flange Preparation

• Remove the old gasket and thoroughly clean flange faces to eliminate debris, corrosion, or residue.
• Ensure flange surfaces are free from radial (cross-face) scoring, as this can cause leakage.
• A surface finish of 3.2 μm to 6.3 μm Ra (125–250 micro-inches) is recommended for spiral wound gaskets.
• Check that flange faces are parallel and concentric, or that pipework flexibility allows proper alignment without excessive bolt loading.
  

Gasket Handling

• Always use a new spiral wound gasket for each installation.
• Verify that gasket dimensions, pressure class, and type match the flange specification.
• Do not apply jointing compounds, grease, or lubricants to metallic gaskets.
• If temporary fixing is required, use only a light spray adhesive to position the gasket.
  

Installation Procedure

• Position the gasket centrally between the flange faces.
• Insert bolts and finger-tighten nuts evenly.
• Tighten bolts using a controlled method such as torque or tension tightening, following a star or cross-bolt sequence.
• Complete final tightening to the specified torque, ensuring uniform gasket compression.
• After installation, confirm that flange faces remain parallel.