IGP’s Spiral wound gaskets have been time and again trusted for creating reliable seals between flanges in piping systems and pressure vessels and equipments performing under very critical operating condition with high vacuum to very high pressure and cryogenic to very high temperature services and for highly corrosive applications. IGP Spiral wound gaskets are constructed with alternate layers of preformed metal strips in which systematically housed with selected soft filler material and by winding them together with determined tightness to form the spiral configuration.

IGP Spiral wound gaskets are super springy and highly resilient by ensuring tremendous flange tightness with leak free flange assembly joint even under high pressure operations with wide pressure fluctuations and with severe thermo cyclic temperature variation.

In the spirally wound gasket the preformed metal strips provide sufficient strength and stability , reinforcement and recoverability and the soft filler material serves to achieve leak free seal tight flange assembly joint.

Generally for Spiral wound gaskets commonly used winding metal strips are SS 304 and SS 316 and the soft filler materials are graphite, Vermiculite and PTFE for high chemical resistance and corrosive applications. IGP spiral wound gaskets are available with all exotic winding metal strips compatible to the medium handled and special filler materials to suit to the customer specified applications and operating service conditions.

Gasket installation

Selection, installation, assembly and bolts tightening of the gasket are critical to ultimately achieve the desired effective seal tight Flange joint. Spiral wound Gaskets during assembling shall be handled horizontally with care and caution without sagging.

Fresh gasket shall always be used which is compatible to the application and operating service condition. The Gasket must be centrally located with reference to the bolt circle. The bolt tightening shall be done sequentially by gradually lifting the torque in steps ensuring specified torque has been applied to all bolts. When the flange bolts are tightened the gasket is compressed. Then the preformed metal with its structural integrity and resilient achieves and retains the overall tightness of the flange joint assembly handling the medium with very high pressure and high temperature.

Simultaneously , the soft filler material flows and fill into any lines, gaps and defects in the gasket seating area of the flange and ensure seal tight and leak free flange joint assembly.

Spiral wound gaskets with their resilient characteristics are most dependable gasket in challenging and critical industrial applications. IGP Spiral wound gaskets are consistently and successfully working in various industries, including refineries, petrochemical plants, chemical processing, pressure vessels, piping and process industries.

Types of IGP Spiral Wound Gaskets

SOR - Spiral Wound Metallic Gasket with Outer Ring only

IGP gasket element is the portion in which preformed metal strip is spirally wound in alternate layer with the soft filler material. In the SOR type Spiral wound gasket an outer ring will be provided to the gasket element. This outer ring will serve to locate the gasket as centering ring and also as compression limiting ring to ensure gasket element is not over compressed by applying bolt torque. This outer ring will also limit the radial flow of the gasket on compression which will enhance the resilient of the gasket element. Outer ring will also prevent the exposure of the gasket element to its outside.

SIR - Spiral Wound Metallic Gasket with Inner Ring only

In the SIR type Spiral wound gasket an inner ring will be provided to the gasket element which will increase its strength and stability. This inner ring will prevent the buckling in the inner diameter of the gasket element on compression. This inner ring will also limit the compression of the gasket and fill the gap between flange bore and gasket element inner diameter and also avoid the fluid handled contact. Inner ring material will normally be the same that of the winding metal strip.

SIO - Spiral Wound Metallic Gasket With Inner and Outer Ring

SIO type Spiral wound gasket element will be fitted with rings on both inner diameter and outer diameter. Inner ring material will normally be the same that of the winding metal strip. The SIO gasket will have the merits of both SOR and SIR and therefore its strength, stability and resilience and sealing capability will be more.

SIOH - Spiral Wound Metallic Gasket with Inner ring and Outer Ring with bolt holes

SIOH type spiral wound gasket are full face Gasket with both inner ring and outer ring with bolt holes. The holes in the outer ring will serve to locate the gasket more precisely and stably during assembling the gasket. These special gaskets are supplied on specific requirements from customer.

SWR - Spiral Wound Metallic Gasket Without Inner and outer Ring

SWR type spiral wound gaskets are only Gasket element without Inner and outer rings. Normally these Gaskets are used in the flanges with grooves or some other facility to correctly locate the gasket and also limit its compression by applying bolt torque. In other cases , Stringent care should be taken to correctly locate the gasket manually and prevent the over compression of the gasket.

SCD - Spiral Wound Metallic Gasket with Centering Device

The Centering Device is typically an internal feature, such as a metal or plastic ring, that helps to locate the gasket centrally between the flanges. It ensures that the gasket is located properly during assembly.