Summary of Flanges and Gaskets
In the summary content of the final episode about flanges and gaskets, we will start with the classification of gaskets.
Classification of Sealing Gaskets
Gaskets come in a wide variety, which can be classified from multiple dimensions:
By Sealing Principle
Force-Type Sealing Gaskets
Self-Tightening Sealing Gaskets
Semi-Self-Tightening Sealing Gaskets
By Pressure Rating
Low-Pressure Sealing Gaskets
Medium-Low Pressure Sealing Gaskets
High-Pressure Sealing Gaskets
Ultra-High Pressure Sealing Gaskets (Note: The division of pressure ratings is relative, and specific selection should be based on standards.)
By Direction of Sealing Stress Action
Axial Sealing Gaskets
Radial Sealing Gaskets
Inclined Angle Sealing Gaskets
BMCMulgraf：Good medium resistance and wide application range
By Material Composition (the Most Common Dimension)
Non-Metallic Gaskets
Made of non-metallic materials, such as:
Rubber gaskets
Polytetrafluoroethylene (PTFE) gaskets
Flexible graphite gaskets
Non-asbestos fiber rubber gaskets, etc.
Application: Commonly used in medium-low pressure, normal temperature, or corrosive media.
Main forms: Flat gaskets and jacketed gaskets.
BMC Polytetrafluoroethylene (PTFE) Sheet/Gasket Series
Semi-Metallic Gaskets
Combining the strength of metal and the sealing property of non-metals. Common types include:
Metal wound gaskets (widely applied)
Flexible graphite composite reinforced gaskets
Metal jacketed gaskets
Metal wave-tooth composite gaskets
Metal serrated/ corrugated combination gaskets
Metal graphite gaskets (metal-to-metal type)
BMCWSG: Good anti-stress relaxation performance
Metallic Gaskets
Manufactured from metallic materials (e.g., stainless steel, Monel alloy), resistant to high temperature and pressure. Diverse forms include:
Metal flat gaskets
Metal serrated gaskets
Metal ring gaskets (e.g., octagonal ring gaskets, elliptical ring gaskets)
Metal lens gaskets
Metal double-cone ring gaskets
Metal C-ring gaskets
O-ring gaskets
BMCORIN: O-type sealing ring suitable for valves and nuclear power.
Starting from the next lecture, we will discuss the physical quantities characterizing the important characteristic properties of sealing gaskets, covering mechanical properties, sealing performance, sealing stress, etc. Stay tuned.
Ingenious Seal Mastery
For sealing leakage issues, Baohua provides solutions. If you have any doubts about sealing technology, please pay attention to Suzhou Baohua and feel free to consult, comment, or leave a message! Thank you all!See you in the next issue!
Email：[email protected] 
