Introduction
Gaskets are used in piping systems to create a seal between two surfaces, preventing leakage of fluids under pressure. They are critical for maintaining system integrity and safety.
What Is a Gasket
A gasket is a sealing material placed between two flange faces to prevent leakage when compressed by bolts.
Main Functions of a Gasket
Sealing
Gaskets fill surface irregularities and prevent fluid leakage.
Pressure Containment
They maintain sealing under pressure conditions.
Surface Protection
Gaskets protect flange faces from direct contact damage.
Types of Gaskets
Non-Metallic Gaskets
- Rubber
- PTFE
- Graphite
Used for low to medium pressure applications.
Semi-Metallic Gaskets
- Spiral wound gaskets
- Kammprofile gaskets
Used for medium to high pressure systems.
Metallic Gaskets
- Ring Type Joint (RTJ)
Used for high-pressure and high-temperature conditions.
Gasket Selection Factors
- Pressure and temperature
- Fluid type (corrosive, steam, etc.)
- Flange type (RF, FF, RTJ)
- Bolt load
Common Problems
- Leakage due to improper tightening
- Gasket blowout
- Material degradation
Proper installation and selection are essential.
Applications
Gaskets are used in:
- Flange connections
- Heat exchangers
- Pressure vessels
- Pumps and valves
Conclusion
Gaskets are essential sealing components in piping systems. Proper selection and installation ensure leak prevention and safe plant operation.
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