How to Choose the Right Flange Bolts and Gaskets

How to Choose the Right Flange Bolts and Gaskets

A flange connection is not complete with the flange itself. Bolts and gaskets also play an important role in creating a reliable and leak-resistant connection.

Selecting incompatible bolts or gaskets can lead to leakage, corrosion, or premature failure.

Choosing Flange Bolts

Bolt selection should consider:

• Flange pressure rating
• Operating temperature
• Material compatibility
• Corrosion environment
• Required tightening force

Bolts should provide sufficient clamping force without exceeding the design limitations of the flange connection.

Choosing the Right Gasket

Common gasket types include:

• Spiral wound gasket
• Graphite gasket
• PTFE gasket
• Rubber gasket
• Ring type joint gasket

The gasket material should be selected according to the fluid, pressure, and temperature.

Why Proper Installation Matters

Even the best flange and gasket may leak if bolts are tightened unevenly. Cross-pattern tightening and proper torque control help distribute the load across the gasket.

The flange facing must also be clean and free from damage before assembly.

For critical applications, buyers should confirm the complete flange connection system rather than selecting the flange alone.

As a professional China steel flange manufacturer, we provide steel flanges for various industrial applications and can support customers with technical information regarding flange dimensions, materials, and connection requirements.