Understanding the Flange Metallic Gasket

Understanding the Flange Metallic Gasket
The Flange Metallic Gasket is a critical component in various industries, particularly in high-pressure and high-temperature applications. It is a precision-engineered component designed to be used in conjunction with precision-machined flanges.Get more news about Flange Metallic Gasket,you can vist our website!

There are several types of gaskets for flanges, including non-asbestos gaskets, spiral wound gaskets, ring joint gaskets, Kammprofile and Jacketed gaskets. Each type of gasket has its own scope, dimensions, materials, and specific applications.

Non-asbestos gaskets are the simplest type of gasket for flanges. They are produced by cutting graphite, organic or inorganic non-asbestos sheets into shape. This type of gaskets suits low pressure, low temperature, and non-critical piping and plumbing applications. Non-asbestos gaskets have fully replaced asbestos gaskets for decades as studies demonstrated the risks associated with the production, use, and disposal of asbestos materials.

Spiral wound gaskets for flanges feature a metal sealing element filled with graphite, PTFE, ceramic fibers and non-asbestos fibers (fillers). For this reason, spiral wound gaskets are classified as “semi-metallic” gaskets. They are ideal for standard flanges, heat exchangers, boiler handholes, manholes and other high-temperature, high-pressure applications.

Metallic gaskets seal via initial line contact or a wedging action between the gasket and the mating flange. The softer metal of the gasket applies pressure on the seal interface through bolt force. It flows into the microfine structure of the harder mating flange, creating a very tight and effective seal.

The ASME B16.20 standard covers metallic gaskets for pipe flanges. It provides comprehensive solutions applying to materials, dimensions, tolerances and marking5. The standard addresses gaskets that are dimensionally suitable for use with flanges described in reference flange standards ASME B16.5, ASME B16.47, API Specification 6A, and ISO 10423 as well as with other ASME standards.

In conclusion, understanding the different types of Flange Metallic Gaskets and their applications is crucial in selecting the right gasket for specific piping applications. The choice of the right material for non-asbestos gaskets should consider multiple factors such as fluid, temperature, pressure, fugitive emissions laws, and mechanical issues.