Slip-On Flange vs Weld Neck Flange: Which One Is Better?

Slip-On Flange vs Weld Neck Flange

Slip-On (SO) Flanges and Weld Neck (WN) Flanges are among the most popular flange types used in industrial piping systems. Choosing the correct type depends on operating conditions and project requirements.

Slip-On Flange

A Slip-On Flange is installed by sliding the pipe into the flange bore and welding both the inside and outside.

Advantages include:

• Easy installation
• Lower cost
• Good alignment
• Suitable for medium-pressure applications

Weld Neck Flange

A Weld Neck Flange features a long tapered hub and is connected by a butt weld.

Benefits include:

• Superior strength
• Excellent fatigue resistance
• Better pressure performance
• Suitable for high-pressure systems

Which One Should You Choose?

Slip-On Flanges are ideal for general industrial piping where cost is an important factor.

Weld Neck Flanges are recommended for critical applications involving high pressure, high temperature, or cyclic loading.

A reliable China steel flange manufacturer can help you select the most suitable steel flange according to your project requirements.