Weld Neck (WN) and Slip On (SO) flanges are two of the most commonly used flange types in industrial piping systems.
They serve different purposes depending on pressure, temperature, and operating conditions.
A Weld Neck flange has a long tapered hub and is connected to the pipe by butt welding.
The design provides:
Weld Neck flanges are commonly used in:
A Slip On flange slides over the pipe and is welded inside and outside.
Its main advantages are:
Slip On flanges are often used in:
| Item | Weld Neck | Slip On |
|---|---|---|
| Welding Method | Butt weld | Fillet weld |
| Pressure Resistance | Higher | Medium |
| Cost | Higher | Lower |
| Installation | More precise | Easier |
| Fatigue Resistance | Better | Lower |
Choose Weld Neck flanges when:
Choose Slip On flanges when:
Both Weld Neck and Slip On flanges play important roles in industrial piping systems.
The appropriate flange type can be selected based on different project requirements and budgets.
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