Weld Neck Flange Explained Premium Choice for High Pressure Piping

What is a Weld Neck Flange

A Weld Neck Flange features a long tapered hub that is butt-welded to the pipe. It is the most commonly used flange type for high pressure, high temperature, and low temperature applications.

Key Advantages

1. Superior stress distribution with tapered hub design
2. High strength connection comparable to pipe itself
3. Handles extreme conditions: high pressure, temperature, cyclic loading
4. Reduced turbulence with matching bore
5. Inspectable welds for quality assurance

Typical Applications

• High pressure steam systems
• High temperature process piping
• Cryogenic liquid gas transfer
• Corrosive medium pipelines
• Critical process lines

Standards and Pressure Classes

• ASME B16.5: Class 150, 300, 600, 900, 1500, 2500
• EN 1092-1: PN6, PN10, PN16, PN25, PN40, PN63, PN100