Oil & Gas
Chosen for reliable operation in pressure-intensive upstream and downstream systems.
Product Detail
Welding Neck Flange
High-performance flange for pressure-critical systems requiring strength, durability, and dependable integrity.
Overview
A robust solution for high-pressure and critical piping lines
Welding neck flanges are designed to handle demanding pressure applications where mechanical strength, stress distribution, and reliable piping performance are essential.
- Strong hub geometry for stress reduction and structural reliability.
- Preferred for critical high-pressure piping and pressure vessel connections.
- Available in carbon steel, alloy steel, stainless steel, and specialty grades.
Technical
Welding Neck Flange specifications
ASME B16.5 – 2020
StandardASME B16.5
Size Range1/2" to 24"
Pressure Class150 to 2500
ConnectionButt Weld
| Feature | Details |
|---|---|
| Primary Use | High-pressure and critical piping service |
| Hub Design | Long taper hub to reduce stress concentration |
| Application | Refineries, pressure vessels, process piping and utility systems |
| Material Options | Carbon, alloy, stainless and specialty grades |
Dimensions of Class
| Class | OD (mm) | Thickness (mm) | Bolt Circle (mm) | Bolt Count | Bolt Dia (mm) |
|---|---|---|---|---|---|
| 150 | 89-1219 | 9.5-55 | 60-1067 | 4-32 | 12.7-31.8 |
| 300 | 95-1321 | 10-68 | 67-1143 | 4-32 | 15.9-31.8 |
| 600 | 95-1321 | 12-83 | 67-1143 | 4-32 | 15.9-31.8 |
| 900 | 114-1321 | 16-92 | 79-1219 | 8-32 | 19.1-34.9 |
| 1500 | 121-1524 | 19-105 | 86-1397 | 8-40 | 22.2-38.1 |
| 2500 | 127-1524 | 28-135 | 89-1397 | 8-44 | 25.4-41.3 |
Applications
Where welding neck flanges excel
Boiler & Vessel Systems
Provides dependable connection performance in pressure-retaining equipment.
Process Plants
Suitable for high-integrity process piping where stress management matters.