Spiral Wound Gasket

Spiral-gasket

Spiral Wound Gasket: Premium Sealing Solutions for Industrial Applications

By Asian Sealing Products – Your Trusted Partner for Sealing Solutions

At Asian Sealing Products, we specialize in manufacturing top-tier sealing products that meet the demands of modern industry. One of our flagship products, the Spiral Wound Gasket, is a high-performance sealing solution used across various critical applications, including the petrochemical, power generation, and marine industries. Designed to deliver superior sealing integrity, our spiral wound gaskets ensure optimal performance in the most challenging and high-pressure environments.

In this product page, we’ll walk you through everything you need about Spiral Wound Gaskets—from their design and construction to their applications, and benefits, and why Asian Sealing Products should be your go-to supplier.

What Is a Spiral Wound Gasket?

A Spiral Wound Gasket (SWG) is a mechanical gasket made from metal and non-metallic materials. These gaskets feature a unique construction that consists of a continuous spiral of metal (usually stainless steel or other alloys) and filler material (typically graphite or PTFE). This spiral construction provides excellent sealing properties while offering strength, flexibility, and durability.

Spiral wound gaskets are commonly used in high-pressure, high-temperature applications where standard gaskets may fail. Their unique construction allows them to adapt to flange surface irregularities and prevent leaks even under extreme conditions.

How Does a Spiral Wound Gasket Work?

The spiral wound gasket works by compressing against the flange faces to form a seal, creating a tight barrier against leaks. The metal winding provides structural strength, while the filler material helps to create an ideal sealing surface, ensuring the gasket conforms well to irregularities or roughness in the flange surfaces. This creates a long-lasting, reliable seal.

The flexibility of the spiral winding allows for compensation for dimensional changes in the mating surfaces and maintains a consistent sealing force throughout the life of the gasket.

Key Features of Spiral Wound Gaskets:

  • Dual Material Construction: The combination of metal and filler material gives the gasket both the strength to resist pressure and the flexibility to form tight seals under varying conditions.
  • High-Temperature and Pressure Resistance: The metal wound structure provides the gasket with outstanding resistance to thermal cycling and pressure variations.
  • Versatility: Available in a range of metals (stainless steel, alloy steels, etc.) and filler materials (graphite, PTFE, and others), spiral wound gaskets are highly customizable to suit various sealing requirements.
  • Excellent Resistance to Corrosion and Chemicals: The metal and filler materials used in SWGs are selected to ensure maximum resistance to corrosive substances and harsh chemical environments.
  • Leak-Free Performance: The unique spiral structure creates a high degree of sealing contact, which ensures leak-free performance in applications where standard gaskets might fail.
  • Self-Adjusting: Spiral wound gaskets are designed to compensate for flange surface irregularities, providing a consistent seal even when surfaces are not perfectly aligned.

Types of Spiral Wound Gaskets

At Asian Sealing Products, we offer a variety of spiral wound gaskets tailored to meet your specific operational requirements.

  • Type CGI (Gasket with Centering Ring and Inner Ring): Has centering and inner rings for precise alignment and added support. Ideal for high-pressure, high-temperature environments.
  • Type CG (Gasket with Centering Ring): Type CG gasket has a centering ring for alignment and prevents shifting. Suitable for medium pressures and temperatures in automotive, HVAC, and plumbing.
  • Type GI (Gasket with Inner Ring): The inner ring provides support and reinforcement in high-pressure/corrosive environments. These gaskets are ideal for harsh industrial applications involving chemicals and solvents.
  • Type G (Gasket only): These are versatile and ideal for non-extreme pressure/temperature joints. This is common in the automotive, plumbing, and general industries.
Benefits of Using Spiral Wound Gaskets 
  • Superior Sealing Performance: Spiral wound gaskets are engineered to provide excellent sealing performance in a wide range of industrial applications, including high-pressure, high-temperature, and aggressive chemical environments.
  • Long-Lasting Durability: The robust design and material selection ensure that spiral wound gaskets can handle extreme pressures, temperatures, and vibration without losing their sealing integrity.
  • Customization for Specific Applications: We offer spiral wound gaskets in various sizes, materials, and configurations to meet the specific needs of your application. Whether you require a special filler material, metal winding, or size, we can provide tailored solutions.
  • Cost-Effective and Reliable: While spiral wound gaskets are engineered for high performance, they are also cost-effective over the long term due to their durability and reliable service in demanding conditions.
  • Ease of Installation and Maintenance: These gaskets are easy to install, and their ability to adapt to flange imperfections means that they require less maintenance and can reduce downtime in industrial processes.
  • Resistant to Corrosive Substances: Spiral wound gaskets made with corrosion-resistant metals and non-metallic materials are ideal for use in aggressive chemical and marine environments.
Applications of Spiral Wound Gaskets

Spiral wound gaskets are indispensable in industries requiring superior sealing performance. Here are some of the key applications:

  • Oil & Gas: Used in pipelines, refineries, and offshore platforms, spiral wound gaskets handle high-pressure and high-temperature environments effectively.
  • Petrochemicals: Ideal for sealing pipes carrying volatile and hazardous chemicals, offering resistance to corrosion and chemical attack.
  • Power Generation: Power plants, including nuclear, thermal, and hydroelectric, rely on spiral wound gaskets to ensure leak-proof connections in steam and water piping systems.
  • Pharmaceuticals & Chemicals: Their chemical resistance makes them suitable for environments handling aggressive fluids in the pharmaceutical and chemical industries.
  • Water Treatment: Used in desalination plants, wastewater treatment, and other water processing applications, providing effective sealing under varying pressure and temperature conditions.
Choosing the Right Spiral Wound Gasket

An appropriate spiral wound gasket is crucial to achieving optimal performance and longevity. Here’s what you should consider:

1. Material Compatibility

The choice of metallic winding and filler material should match the fluids being processed. For example, stainless steel is a popular choice for its corrosion resistance, while graphite is ideal for high-temperature applications.

2. Pressure and Temperature Ratings

Ensure the gasket is rated to withstand the maximum pressure and temperature of your system. Selecting a gasket with an inner or outer ring provides added strength for more demanding conditions.

3. Gasket Dimensions

Ensure the gasket matches the dimensions of the flange to avoid leaks or damage. At Asian Sealing Products, we offer gaskets in various types and standard sizes, and custom solutions are available for specialized needs.

4. Certifications and Standards

Our gaskets comply with global industry standards like ASME B16.20 and are compatible with various flange specifications, including ASME B16.5, ASME B16.47 Series A & B, API 605, MSS SP44 Flanges, EN1514-2, BS 3381, JIS B2404, BS 4865-2, DIN 2632 and more, ensuring quality and safety in all applications.

Why Choose Asian Sealing Products for Your Spiral Wound Gaskets?

1. High-Quality Manufacturing

At Asian Sealing Products, we are committed to delivering only the highest-quality spiral wound gaskets. Our state-of-the-art manufacturing process ensures precision, durability, and reliability in every gasket we produce.

2. Custom Solutions

Every application has unique requirements, and we understand the importance of a tailored sealing solution. We offer custom spiral wound gaskets in various sizes, materials, and configurations to suit your exact needs.

3. Industry Expertise

With years of experience serving industries such as petrochemical, oil & gas, power generation, and more, our team of experts is well-equipped to help you select the right gasket for your application.

4. Competitive Pricing

Our spiral wound gaskets are competitively priced without compromising on quality. We aim to provide cost-effective sealing solutions that meet your performance expectations.

5. Global Delivery

No matter where you are located, we ensure timely delivery of our gaskets across the globe. Our efficient logistics team ensures that your products reach you on time, so you can keep your operations running smoothly.

6. Technical Support and After-Sales Service

We provide comprehensive support throughout the life of our products. From initial consultation to post-sales assistance, our technical experts are available to answer any questions and ensure proper installation and performance.

Order Your Spiral Wound Gaskets Today!

Don’t compromise on safety and performance. Choose Asian Sealing Products for high-quality spiral wound gaskets that are designed to meet the challenges of your industrial applications. Whether you need a standard solution or a custom-built gasket, we’re here to provide the expertise and products you need.

Ready to Upgrade Your Sealing Solutions?

Contact Us Now for expert advice and a free consultation on selecting the best spiral wound gaskets for your business!

Product Details
  • Solid metallic inner & outer ring
  • Suitable for high pressure and temperature applications
  • Standard spiral wound gasket for raised face applications
  • Prevents turbulence and erosion damage to flange
  • Prevents damage to the gasket bore and inner windings
  • Inner ring acts as a heat shield and as a corrosion barrier
  • Wide choice of materials for filler and metal strip
  • General and critical duties
  • 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
  • General duties
  • Solid metallic inner ring
  • High pressure & high temperature capability
  • Male to female flanges in vessels, valves and pumps
  • Wide choice of materials for filler and metal strip
  • General and critical duties
  • Wide choice of materials for filler and metallic strip
  • Suitable for high pressure and temperature applications
  • Recommended flanges are tongue & groove, male to female and flat face to recess in vessels, valves and pumps
  • General and critical duties
SPIRAL WOUND GASKETS - Winding Materials : Temperature & Hardness Reference Chart

 

Sl.No Winding Material Marking Code Temperature Range Hardness Range Color Code
1 Carbon Steel CS (- 30°C to + 400 °C) 120 BHN Max Silver
2 SS 304 304 540°C Max 160 BHN Max Yellow
3 SS 304L 304L 540°C Max 160 BHN Max Yellow
4 SS 304H 304H Customer Requirement Customer Requirement No Colour
5 SS 309 309 540°C Max 160 BHN Max No Colour
6 SS 310 310 540°C Max 160 BHN Max No Colour
7 SS 316 316 800°C Max 160 BHN Max Green
8 SS 316L 316L 800°C Max 160 BHN Max Green
9 SS 316Ti 316Ti Customer Requirement Customer Requirement No Colour
10 SS 317L 317L 800°C Max 160 BHN Max Maroon
11 SS 321 321 850°C Max 160 BHN Max Turquoise
12 SS 321H 321H Customer Requirement Customer Requirement No Colour
13 SS 347 347 850°C Max 160 BHN Max Blue
14 SS 347H 347H Customer Requirement Customer Requirement No Colour
15 SS 410 410 Customer Requirement Customer Requirement No Colour
16 SS 430 430 440°C Max 190 BHN Max No Colour
17 SS 904L 904L Customer Requirement Customer Requirement No Colour
18 UNS N08367 AL-6XN Customer Requirement Customer Requirement No Colour
19 UNS S31254 SMO 254 Customer Requirement Customer Requirement No Colour
20 Duplex 32205 2205 Customer Requirement Customer Requirement No Colour
21 Duplex 31803 31803 Customer Requirement Customer Requirement No Colour
22 Duplex 32750 2507 Customer Requirement Customer Requirement No Colour
23 UNS S17700 17-7 PH Customer Requirement Customer Requirement No Colour
24 Monel 400 MON 650°C Max 150 BHN Max Orange
25 Nickel 200 NI 550°C Max 160 BHN Max Red
26 Titanium Grade 2 TI 2 950°C Max 160 BHN Max Purple
27 Titanium Grade 7 TI 7 Customer Requirement Customer Requirement Purple
28 Alloy 20 or Carpenter 20Cb3 A-20 Customer Requirement Customer Requirement Black
29 Hastelloy Grade B HAST B 950°C Max 200 BHN Max Brown
30 Hastelloy Grade B-2 HAST B-2 Customer Requirement Customer Requirement Brown
31 Hastelloy Grade B-3 HAST B-3 Customer Requirement Customer Requirement Brown
32 Hastelloy Grade C-276 HAST C276 950°C Max 200 BHN Max Beige
33 Hastelloy Grade C-22 HAST C22 Customer Requirement Customer Requirement Beige
34 Hastelloy Grade C-2000 HAST C2000 Customer Requirement Customer Requirement Beige
35 Hastelloy Grade X HAST X Customer Requirement Customer Requirement No Colour
36 Inconel Grade 600 INC 600 1000°C Max 200 BHN Max Gold
37 Inconel Grade 625 INC 625 1000°C Max 240 BHN Max Gold
38 Inconel Grade X-750 INX 950°C Max 240 BHN Max No Colour
39 Inconel Grade 718 INC 718 Customer Requirement Customer Requirement No Colour
40 Incoloy Grade 800 IN 800 1000°C Max 200 BHN Max White
41 Incoloy Grade 800H IN 800H Customer Requirement Customer Requirement White
42 Incoloy Grade 825 IN 825 1000°C Max 190 BHN Max White
43 Copper Copper Customer Requirement Customer Requirement No Colour
44 Copper Copper Customer Requirement Customer Requirement No Colour
45 Zirconium ZIRC Customer Requirement Customer Requirement No Colour
Note : The above colour code is identifying the spiral wound gasket for winding material, a continuous colour around the outer edge of centering outer ring.
SPIRAL WOUND GASKETS – Filler Materials : Temperature & Pressure Reference Chart
Sl.No Filler Material Marking Code Temperature Range Working Pressure Color Code
1 Graphite FG (- 200°C to + 450 °C ) 250 bar Max Grey Stripe
2 Polytetra Fluoro Ethylene (PTFE) PTFE ( – 150°C to + 240 °C ) 100 bar Max White Stripe
3 Mica Mica ( – 100°C to + 800 °C) 100 bar Max Light Blue Stripe
Note : The above colour code is identifying the spiral wound gasket for filler material, for below NPS 1-1/2″ shall have two stripes at 180° apart and for NPS 1-1/2″ & above size shall have four stripes at 90° apart.
SPIRAL WOUND GASKETS – TYPES AVAILABLE
Type Product Description Applications
CGI Spiral Wound Metallic Gasket with inner and outer rings, where the rings are made from the materials like carbon steel, stainless steel and other alloy metals. General-purpose sealing in diverse applications.
CG Spiral Wound Metallic Gasket with centering outer ring. This gasket type is well-suited for flange connections in diverse industries.
GI Spiral Wound Metallic Gasket with inner rings, typically as same as winding material. Ideal for applications requiring enhanced internal support and stability.
G Spiral Wound Metallic Gasket without a centering outer ring & inner ring. Suitable for flanges with well-aligned bolt holes, where a centering outer ring & inner ring is unnecessary.
SPIRAL WOUND GASKETS – Nominal Gasket Thickness & Compression Thickness Reference
Sl.No Nominal Thickness Compressed Thickness
1 3.20 mm (0.126 in) 2.40 mm – 2.60 mm (0.095 – 0.105) in
2 4.45 mm (0.175 in) 3.17 mm – 3.43 mm (0.124 – 0.135) in
3 6.35 mm (0.250 in) 4.60 mm – 4.80 mm (0.180 – 0.190) in
Note : This compressed thickness after applying of compression load as per ASME B16.20
Edn 2017, for gasket thickness 4.45 mm the require compression thickness is min 3.43 mm

Downloads

FAQ's

Our spiral wound gaskets can handle temperatures up to +1000°C, ensuring stability in high-temperature applications. This feature makes them ideal for industries with extreme temperature conditions.

Spiral wound gaskets have established themselves as the most dependable sealing components suitable for challenging, vital, and demanding applications.  Spiral  gaskets offer excellent sealing performance, compatibility with various media, resilience to high temperatures and pressures, and the ability to compensate for flange irregularities, making them a reliable choice for demanding sealing applications. 

Spiral wound gaskets find applications in industries such as Oil and Gas, Chemical Processing, Power Generation, Petrochemical, Water and Wastewater Treatment, Marine and Shipbuilding, Food and Beverage Processing, Aerospace, HVAC Systems, Mining, and Minerals Processing. Their versatile sealing capabilities and resilience make them reliable in demanding conditions.

Our gaskets undergo color coding for easy selection and identification. The color on the outer edge of the centering ring indicates both the winding and filler materials. Solid colors represent metallic winding material, while colored stripes designate filler materials. This system aligns with industry standards outlined in ASME B16.20.

The global gaskets and seals market was estimated to be USD 56.93 billion in 2021 and projected to grow at a CAGR of 4.1% over the forecast period . As per the PitchBook News and analysis ,the specific market size for spiral wound gaskets may require a more detailed analysis from industry reports, which could be obtained by referring to the sources mentioned in the search results.

The thickness of a spiral wound gasket directly influences its sealing performance and suitability for specific applications. Understanding and specifying the appropriate thickness is crucial to ensuring an effective seal in diverse industrial settings.

When placing an order, it’s essential to specify the gasket style (CGI, CG, etc.), nominal pipe size (NPS), pressure rating, applicable gasket standard (ANSI, ASME, etc.), preferred winding materials, outer ring material, and inner ring material. This ensures the selected gasket aligns with the application’s requirements and operating conditions.

Enquire Now