A Spiral Wound Gasket (SWG) is a semi-metallic component sealing joints widely within industries where these must endure aggressive chemicals, high pressures and extreme temperatures. For its manufacture a thin V-shaped metallic strip with softer filler is spirally wound. The build joins the metal's strength plus resilience with filler conformability creating a truly reliable seal.
For structural strength there is provision via the metallic strip, which is typically stainless steel or alloys such as Inconel and Monel, and filler materials like graphite, PTFE, or mica ensure that leak prevention happens as they compensate for flange imperfections. This design means spiral wound gaskets can maintain tightness through pressure fluctuations, thermal cycles, and vibration. Refineries, chemical plants, together with power facilities prefer them in light of this ability as the most common metallic gaskets.
Every spiral wound gasket consists of three essential elements:
Spiral wound gaskets gain in their flexibility in addition to resilience as well as durability under challenging conditions on account of this layered design.
Standard spiral wound gaskets are manufactured in different thicknesses to match international flange requirements. For example:
These dimensions ensure compatibility with ASME, EN, DIN and JIS flanges, making them suitable for global industrial use.
The choice of materials determines gasket performance and lifespan:
Color coding is often used for quick identification — for example, 316 SS is Green, Monel is Orange, Graphite filler is Grey and PTFE is White.
Spiral wound gaskets are widely used in:
They are especially recommended for hydrocarbons, HP steam, aggressive chemicals and high-vacuum services.
A Spiral Wound Gasket is designed since a V-shaped metal winding is combined with a filler material such as graphite or PTFE. The metal winding gives it resilience and also strength and a filler ensures the tight sealing. The gasket maintains performance due to this combination even in fluctuating pressures as well as temperatures.
Selection depends on multiple factors: chemical compatibility of filler and winding, operating temperature range, working pressure, and the flange standard (ASME, DIN, JIS, etc.). Consulting with manufacturers or suppliers helps ensure that the correct material combination is chosen for long-term reliability.
You can use these gaskets that have rings of carbon steel. Usable temperature is -40°C. For cryogenic uses, Spiral Wound Gaskets function even to -200°C if alloys and fillers are special.
No. Once compressed, the filler and metal windings deform permanently. Flange leakage as well as loss of containment plus potential safety hazards can result from reusing a gasket.
These gaskets may last 3, 5 years in storage if they are stored well in a clean, dry area without any stress. However, operating conditions, along with media type, and maintenance practices determine actual service life. Proper handling ensures optimal sealing performance during their operational lifespan.
The inner ring works to minimize the risk of gasket fragments for entering into the process stream and prevents the windings from buckling inward under pressure in order to protect the filler from erosion. Therefore, the gasket is more reliable in critical services. Refineries and also boilers as well as reactors are some examples of such services.
Spiral Wound Gaskets remain the most popular metallic gaskets for industries needing ultimate reliability. It combines, in a unique way, metallic windings along with filler materials. This combination ensures a superb level of sealing when operating conditions are quite severe.
As trusted manufacturers, suppliers & exporters of Spiral Wound Gaskets in Gujarat, India, Ordiném Engitech provides gaskets designed to meet international standards, offering safety, durability and performance across diverse applications.
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