Spiral Wound Gasket

Spiral-gasket

Spiral Wound Gaskets: The Ultimate Seal for Demanding Environments

Are you looking for a gasket that can withstand extreme temperatures, fluctuating pressures, and corrosive chemicals? Spiral wound gaskets are the proven solution, engineered to excel in the most challenging industrial applications. These gaskets meet global 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, and more.

Why Choose Spiral Wound Gaskets?

  • Unmatched Versatility: Perfect for sealing steam, chemicals, oils, hydrocarbons, and more.
  • Extreme Temperature Resistance: Operate reliably from as low as -200°C to a scorching +1000°C.
  • High-Pressure Performance: Seal tightly against pressures up to 250 bar.
  • Exceptional Recovery: The unique combination of metal and filler materials ensures a tight seal even under significant thermal cycling and pressure fluctuations.
  • Easy Installation: Robust design minimizes damage during installation.
  • Multiple Configurations: Available with inner rings, outer rings, or both to suit your specific flange and application requirements.

How Spiral Wound Gaskets Work ?

Spiral wound metallic gaskets consist of a V-shaped metallic strip wound in a spiral pattern, interleaved with a resilient filler material. The metal provides strength and recovery, while the filler delivers exceptional sealing properties. This combination makes them ideal for:

  • Petrochemical Refineries
  • Chemical Processing Plants
  • Pharmaceutical Manufacturing
  • Nuclear Power Generation
  • Oil and Gas Production
  • Marine and Offshore Applications
  • And many more!

Expertly Crafted for Your Needs

We precision-manufacture a wide range of spiral wound gaskets to meet your specifications. Choose from various materials, including:

  • Filler Materials: Graphite, PTFE, non-asbestos, mica
  • Winding Materials: 316L stainless steel, 304 stainless steel, Monel, Inconel, and others

Spiral Wound Gasket Types

We manufacture spiral wound gaskets in a variety of styles to align with the specific flange facings utilized on the flanges, including

  • Type CGI (Gasket with Centering Ring and Inner Ring)
  • Type CG (Gasket with Centering Ring)
  • Type GI (Gasket with Inner Ring)
  • Type G (Gasket only)

Your Success is Our Priority

Not sure which gasket is right for you? Our experienced technicians are here to help. We’ll guide you through the selection process to ensure you get the optimal gasket for your application.

Manufacturing Process of Spiral Wound Gasket

Our spiral wound gaskets are meticulously crafted by winding alternating strips of metal and filler material. By selecting different combinations of materials, these gaskets can be tailored to meet diverse operational needs. They are especially suited for steam, chemicals, oils, and hydrocarbons.

The outer rings of these gaskets rest on the flange bolts, ensuring the gasket is centered on the raised face of the flange. This design supports the sealing element and prevents over-compression, enhancing the gasket’s durability and performance.

Key Features

  • Temperature Resistance: Up to +1000°C
  • Fluid Pressure Resistance: Up to 250 bar
  • Versatility: Suitable for a wide range of media, including steam, chemicals, oils, and hydrocarbons
  • Ease of Installation: Robust design allows for simple installation without damage
  • Non-Adhesive: Easily removable after use
  • Compliance: Manufactured to meet recognized national and international standards

Get the perfect seal with our high-performance spiral wound gaskets. Browse our selection of types and standard sizes below .

 

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

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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.

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