TYPES OF METALLIC INDUSTRIAL GASKETS

Science and Technology, Environment Science
Metallic-industrial Gaskets
What is Metallic Gasket?
A metallic gasket is a type of sealing element made primarily of metal or metal-based materials designed to provide a robust seal between two connecting surfaces, such as flanges, in high-pressure and high-temperature applications. Metallic gaskets are essential in industries like oil and gas, chemical processing, power generation, and petrochemical, where reliability and durability are critical due to the extreme conditions in which they are used.
Key Characteristics of Metallic Gaskets:
Material Composition:
Made from metals such as stainless steel, carbon steel, copper, Inconel, Monel, and other alloys that withstand high pressures, temperatures, and sometimes corrosive environments.
Durability:
Metallic gaskets are highly resilient and can withstand extreme mechanical stresses, including high pressure, thermal cycling, and chemical exposure.
Sealing Mechanism:
Metallic gaskets often create a seal through deformation when compressed between flanges, adapting to surface irregularities to prevent leaks. This deformation ensures a tight, secure seal even in harsh conditions.
Advantages of Metallic Gaskets:
High Pressure and Temperature Resistance: Can endure conditions that would damage or degrade other gasket materials.
Durability and Longevity: Last longer than non-metallic gaskets in demanding environments.
Suitability for Hazardous Media: Often required in applications with dangerous or corrosive fluids and gases.
Types of Metallic Gaskets
1. Ring Type Joint (RTJ) Gaskets
Made from solid metal, RTJ gaskets are precision-machined and are designed for use in high-pressure environments, often in oil and gas applications.
Common shapes: Oval and octagonal, fitting specific RTJ flanges.
Materials: Soft iron, stainless steel, Inconel, and other alloys depending on the application.
2. Spiral Wound Gaskets
Composed of a metallic strip and filler material wound together, providing a resilient seal.
Used in high-pressure and high-temperature applications, as the flexible construction withstands thermal cycling.
Materials: Stainless steel, carbon steel, Monel, and fillers like PTFE, graphite, or ceramic.
3. Corrugated Metal Gaskets
Made from a corrugated metal core with optional filler materials to improve sealing.
Used where softer, more flexible gaskets may not perform adequately.
Often used in medium- to high-pressure applications, especially where bolt loads are limited.
4. Metal Jacketed Gaskets
Comprised of a metallic outer layer with a soft filler core (often graphite or ceramic).
Ideal for heat exchangers, large vessels, and boilers.
Suitable for moderate- to high-pressure applications.
5. Camprofile Gaskets (Grooved Metal Gaskets)
Made from a solid metal core with concentric grooves on each side and often coated with a softer sealing material.
Used in high-temperature, high-pressure applications, especially in chemical processing.
Common materials: Stainless steel, with graphite, PTFE, or other soft materials for the coating.
6. Kammprofile Gaskets
Similar to camprofile, with a metal core and grooves, but typically with a thicker, more flexible sealing layer.
Provides high seal integrity and is used in heat exchangers and other high-stress environments.
7. Double-Jacketed Gaskets
Contains two metal layers with a soft filler core, offering good sealing in harsh conditions.
Used in applications involving chemicals, steam, and other fluids.
Common in applications requiring high-sealing reliability at lower bolt loads.
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