Types of Gasket
What is Gasket:
Gasket is a sealing material placed between two connecting flanges
it Creates a static seal.
it Maintains Leakage proof sealing in all operating conditions.
Read this..Flange Related Q&A
Gasket selection criteria:
- Temperature
- Pressure
- Corrosion Resistance
- Types of fluid
- Robustness
- Availability
- Cost
Read this..Piping Material Selection
Types of Gasket:
- Non-Metallic
- Metallic
- Composite
1. Non-Metallic Gasket :
- Rubber , Teflon , Compressed Non-asbestos fiber (CNAF)
- Soft gasket can be full face or inside bolt circle
- Easily compressed with low tension bolting
- Used in low pressure class flanged such as 150 or 300 class
- Normally used in hydrocarbon services
- Cheapest and easily available
Read this..Pipe and pipe classification
2. Metallic Gasket:
- Also known as ring gasket or RTJ
- Soft iron , Low Carbon Steel, Stainless Steel , Monel , Inconel
- Used in high pressure class flanges , normally above 900 class
- High tensile bolting required
- Very robust
- Most costly
Read this..What is Code Standard & Specification
3. Composite Gasket :
- Spiral wound , Metal jacketed , camprofile
- Made from different materials
- Combinations of metal and non-metal
- Used in wide range of pressure and temperature
- Careful handling required
- Cost effective
