SWG 316L/FG SS 316L with Graphite Filler Spiral Wound Gasket

China manufacturer of SWG 316L/FG SS 316L with Graphite Filler Spiral Wound Gasket

Spiral Wound Gaskets are high-performance sealing components widely used in critical applications such as pipelines, flanges, and heat exchangers

Spiral Wound Gaskets Structure

A spiral wound gasket typically consists of the following components:

Metal Windings:
- Material: Typically stainless steel (e.g., SS304, SS316, SS321,Duplex S31803,S32750 ) or other alloys (e.g., Inconel, Monel).
- Function: Provides strength, resilience, and the ability to handle high pressure and temperature fluctuations.
Filler Material:
- Material: Non-metallic fillers such as graphite, PTFE, or mica.
- Function: Ensures a tight seal by filling the imperfections on the flange surface.
  - Graphite: Excellent for high-temperature and high-pressure applications.
  - PTFE: Best for chemical resistance in corrosive environments.
  - Mica: Suitable for extreme high-temperature environments (e.g., thermal power plants).
Inner Ring and Outer Rings:
- Inner Ring: Prevents gasket blowout and protects the windings from erosion.
- Outer Ring: Provides a centering guide during installation and prevents over-compression.
- Material: Typically stainless steel or Galvanized CS (carbon steel ) with optional coatings.

Types of Spiral Wound Gaskets

suitable for high pressure and temperature applications for TG/male/ female flange .
For example: SS304/FG.

SWG with inner and outer ring, for raised & flat face flange.
For example: SS304/SS304+FG/CS

CG Type Spiral Wound Gasket:
SWG with only outer ring, for raised / flat face flange.
For example: SS304/FG CS

RIR Type Spiral Wound Gasket:
SWG with only inner ring, for male / female flange.

Basic Type or R Type Spiral Wound Gasket :
- Consists only of windings and filler material.SWG with only filler and winding,
- Suitable for tongue-and-groove or male-female flange faces.
With Inner Ring or RIR Type Spiral Wound Gasket:
- Spiral Wound Gasket Style RIR is a sealing element and inner metal ring, with Flexible Graphite filler material.
- Used in high-pressure and high-temperature applications.
With Outer Ring (Centering Ring): CG Type Spiral Wound Gasket:
SWG with only outer ring, for raised / flat face flange. Common in raised-face flanges.
With Inner and Outer Rings: CGI Type Spiral Wound Gasket:
- Combines the features of both inner and outer rings, providing the highest level of reliability.
- Suitable for critical applications such as high-pressure steam or hydrocarbons.

Spiral wound gaskets Material slection

Spiral wound gaskets are designed for ASME B16.20 and ANSI B16.5/B16.47 flanges. Spiral wound gaskets are available for classes 150 to 2500. Custom filler, winding strip, guide ring and inner ring materials are available upon request.

Winding Materials:	Max. Temp. Range
Stainless Steel 304	760°C
Stainless Steel 316L	760°C
Filler Materials:
Graphite	523°C
PTFE	260°C
Guide Ring Materials:
Carbon Steel	538°C
Inner Ring Materials:
Stainless Steel 304	760°C
Stainless Steel 316	760°C