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 a spiral wound gasket manufacturer is a critical decision that impacts plant safety, equipment uptime, and total cost of ownership. Asian Sealing Products delivers precision-engineered gaskets for high-stakes industries where sealing integrity is non-negotiable.

1. Advanced Precision Winding Technology

Unlike standard suppliers, we utilize automated winding technology to ensure consistent winding density and an exact metal-to-filler ratio. This precision is vital for achieving the correct “spring-back” action, allowing the gasket to maintain a leak-proof seal during thermal cycling and pressure surges.

2. Material Excellence & Traceability

We maintain a robust inventory of corrosion-resistant alloys (SS316L, Inconel, Monel, Hastelloy) and high-purity fillers (Graphite, PTFE, Ceramic). Every gasket is manufactured from certified raw materials, ensuring that our products integrate seamlessly into high-pressure oil and gas plants, power stations, and chemical processing units.

3. Global Standards & Stringent Quality Testing

Quality is the core of our manufacturing process. Our SPW gaskets are produced in compliance with ASME B16.20, API, and DIN standards, undergoing rigorous dimensional and compression testing. We provide full documentation and Material Test Certificates (MTCs), giving you complete peace of mind regarding safety and compliance.

4. Rapid Turnaround & Technical Expertise

We understand that downtime is costly. We are committed to fast production cycles and dependable global delivery. Our technical team is available to assist with custom gasket design for non-standard flanges, ensuring you receive a bespoke sealing solution that optimizes the performance of your critical equipment.

At Asian Sealing Products, we’re committed to delivering Spiral Wound Gaskets that not only meet industry expectations, but consistently exceed them. Our gaskets are designed and manufactured in compliance with leading international standards to ensure reliability, safety, and compatibility across a wide range of industrial applications.

Below are the major standards our Spiral Wound Gaskets conform to:

ASME Standards

• ASME B16.5
  Covers pipe flanges and flanged fittings from NPS ½ to 24. Our gaskets are fully compatible with these flanges across multiple pressure and temperature classes.
• ASME B16.47 Series A (MSS SP-44)
  Suitable for larger flanges (NPS 26–60) used in high-pressure systems. Heavier, robust designs.
• ASME B16.47 Series B (API 605)
  Designed for large-diameter flanges used in lower-pressure systems. Lighter than Series A.
• ASME B16.20
  This is the core specification for metallic gaskets, including Spiral Wound Gaskets. We follow it strictly for dimensions, material requirements, and performance.

British Standards (BS)

• BS 1569, BS 3274, BS 3381, BS 4504
  Cover pipe flange dimensions and spiral wound gasket specifications. Our gaskets are fully compatible with these standards.

European Standards (EN)

• BS EN 1092
  Specifies requirements for steel, cast iron, and copper alloy flanges. We provide gaskets for all PN-rated flanges.
• BS EN 1759
  Focuses on class-designated flanges used in industrial piping systems. Gaskets are available for all class ratings.

API Standards

• API 601
  Covers metallic gaskets used in refinery services. Our gaskets meet all material and performance criteria for high-demand refinery environments.
• API 605
  Related to ASME B16.47 Series B, this standard deals with large-diameter carbon steel flanges.

DIN Standards (Germany)

We manufacture gaskets compatible with a wide range of DIN flange standards. Please specify the exact DIN number for precise matching.

JIS Standards (Japan)

Gaskets are available to suit Japanese Industrial Standards. Custom manufacturing is available based on specified JIS types.

Indian Standards (IS)

• IS 7719 – General requirements for metallic gaskets.
• IS 10864 – Specific to Spiral Wound Gaskets.
  Our gaskets comply with both quality and performance.

AWWA Standards

We offer gaskets suitable for water and wastewater flanges manufactured under AWWA standards. Please share the specific standard for compatibility.

Other Recognized Standards

• MSS SP-44 – Covers steel pipe flanges; ties in with ASME B16.47 Series A.
• BS 10 – Older British standard, still used in some legacy systems.
• Taylor Forge Dimensions – We provide gaskets matching Taylor Forge flange specs.
• TEMA Code – Gaskets suitable for heat exchangers designed to TEMA standards.

We can also manufacture spiral wound gaskets in non-standard or proprietary dimensions based on your project needs. Just provide the flange details or design specs, and we’ll take care of the rest.

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.