What is a spiral wound gasket? A complete guide by Haihao Group
In industrial piping and pressure vessel applications, leak-proof sealing is critical to safety and performance. One of the most widely used sealing solutions in high-pressure and high-temperature environments is the spiral wound gasket (SWG). At Haihao Group, we recently completed the production of a batch of spiral wound gaskets with 304 stainless steel inner and outer rings and graphite filler, customized for a global client requiring reliable sealing in extreme conditions.
But what exactly is a spiral wound gasket? Let’s break it down.
Spiral wound gaskets with 304 stainless steel inner and outer rings and graphite filler are packed and ready for shipment
What Is a Spiral Wound Gasket?
A spiral wound gasket is a semi-metallic sealing element made by spirally winding a metal strip (typically stainless steel) and a soft filler material (such as graphite or PTFE) under tension. It is designed to provide excellent mechanical strength, chemical resistance, and the ability to withstand fluctuating pressure and temperature.
The gasket typically includes:
Filler Material (e.g., Graphite or PTFE): Provides sealing performance and fills surface irregularities.
Winding Strip (e.g., 304 or 316 Stainless Steel): Offers structural strength and corrosion resistance.
Inner Ring (optional): Prevents inward buckling of the gasket during compression.
Outer Ring: Centers the gasket and controls the compression.
Materials Used in Spiral Wound Gaskets
At Haihao Group, we offer spiral wound gaskets in a variety of materials to suit different industrial applications. The recent production featured the popular 304 Stainless Steel + Graphite configuration:
Metal Winding & Rings: ASTM A240 TP304
Excellent corrosion resistance, suitable for steam, water, oil, and gas.
Filler Material: Graphite
High-temperature resistance up to 500°C, chemical inertness, and excellent compressibility.
Other materials available include:
316L, Monel, Hastelloy, Inconel for metal winding
PTFE, mica, or ceramic for filler in specific applications
Dimension inspection of spiral wound gasket
Where Are Spiral Wound Gaskets Used?
Spiral wound gaskets are commonly used in:
- Petrochemical plants
- Refineries
- Power generation stations
- Offshore platforms
- Pipeline flange connections
- Heat exchangers, pumps, and valve flanges
Their resilience against high temperatures, aggressive chemicals, and pressure cycling makes them ideal for critical applications.
Advantages of Spiral Wound Gaskets
- High Sealing Integrity under varying conditions
- Reusable in some low-cycle operations
- Chemical and thermal resistance depending on the filler
- Balance between flexibility and strength
- Available in custom sizes and standards: ASME, EN, DIN, GOST, JIS
Haihao Group’s Manufacturing Expertise
Haihao Group recently produced a series of spiral wound gaskets with 304+Graphite configuration for a European client involved in pipeline maintenance. Despite being a small-batch order, the product required strict dimensional accuracy, surface finish, and EN 10204 3.1 material certification.
Every gasket was:
Visually inspected for flatness, concentricity, and absence of damage
Verified for material compliance and traceability
Packaged with corrosion-resistant wrapping for overseas shipment
We offer spiral wound gaskets conforming to ASME B16.20, EN 1514-2, and custom drawings.
Need Spiral Wound Gaskets? Contact Haihao Group
Whether you require standard sizes or tailor-made solutions, Haihao Group is your trusted supplier of high-performance spiral wound gaskets and other piping components.
Material Options: 304, 316L, Inconel, Graphite, PTFE
Certifications: EN 10204 3.1, NACE MR0175, ISO
Applications: Oil & gas, chemical processing, energy, marine
Global Reach: Delivered to clients in Asia, Europe, Middle East & South America
Get in touch today for technical support, a quotation, or to place your next gasket order!