A gasket might be defined as a flexible component that sits in-between two other surfaces generally to prevent leakage from or into the joined objects while under compression. Gaskets are commonly manufactured by cutting from sheet materials.
Types of Gasket
1) Sheet gaskets
When a sheet of metal has the gasket shape "punched out" of it, it is a sheet gasket. These gaskets can fill various different chemical requirements based on the dormancy of the material used. Non-asbestos gasket sheet is longlasting, made of multiple materials, and thick in nature. Applications using sheet gaskets involve acids, corrosive chemicals, and steam. Flexibility and good recovery prevent breakage during installation of a sheet gasket.
2) Solid material gaskets
The idea behind solid material is to use metals which can't be punched out of sheets, however, are still low-cost to manufacture. These gaskets typically have a {much|a way|a far} higher level of quality control than sheet gaskets and customarily can withstand much higher temperatures and pressures. The key drawback is that a solid metal must be greatly compressed so as to become flush with the flange head and stop leakage. the material choice is more difficult; because metals are primarily used, process contamination and oxidization are risks. a further drawback is that the metal used should be softer than the flange — so as to make sure that the flange doesn't warp and thereby stop sealing with future gaskets. Even so, these gaskets have found a distinct segment in the industry.
3) Spiral-wound gaskets
Spiral-wound gaskets comprise a combination of metallic and filler material. Generally, the gasket features a metal wound outward in a circular spiral with the filler material wound in the same manner, however, ranging from the opposing side. This leads to alternating layers of filler and metal. The filler material in these gaskets acts as the sealing part, with the metal providing structural support.
These gaskets have evidenced to be reliable in most applications, and permit lower clamping forces than solid gaskets, albeit with a higher value.
4) Kammprofile gaskets
Kammprofile gaskets are used in many older seals since they have both a flexible nature and steady performance. Kammprofile work by having a solid corrugated core with a flexible covering layer. This arrangement allows for very high contracting and an extremely tight seal along the ridges of the gasket. Since generally, the graphite will fail instead of the metal core, Kammprofile can be repaired during later inactivity. Kammprofile has a high capital cost for most applications but this is countered by long-lasting life and increased reliability.
5) Fishbone Gaskets
Fishbone Gaskets are a direct substitute for Kammprofile and Spiral wound gaskets. They are fully CNC machine manufactured from similar materials but the design of the gaskets has eliminated inherent shortcomings. The rounded edges do not cause flange damage. The added "Stop Step" prevents the Fishbone gaskets from being over compressed/crushed, often caused by hot torque techniques on plant startup. The bones of the gasket remain ductile and adjust to thermal cycling and system pressure spikes resulting in a long-lasting and steady flange seal that outranges all other gaskets of this nature significantly.
6) Flange gasket
A flange gasket is a type of gasket made to fit between two sections of pipe that are flared to provide a higher surface area.
Flange gaskets are available in a variety of shapes and sizes and are categorized by their inner and outside diameter.
The gaskets for flanges can be divided into major 4 different categories:
1. Sheet gaskets
2. Corrugated metal gaskets
3. Ring gaskets
4. Spiral wound gaskets
