4" Flange - 900 PSI - Long Weld Neck
| Nominal Size | 4" |
| Pressure Class | 900 PSI |
| Connection Type | Long Weld Neck |
| Bore | 4" |
| Outer Diameter (OD) | 11.5" |
| Flange Thickness | 1.75" |
| Barrel OD | 6.25" |
| Wall Thickness | 1.13" |
| Bolt Circle Diameter | 9.25" |
| Number of Bolt Holes | 8 |
| Bolt Hole Size | 1-1/4" |
| Ring Groove (RF) Depth | 6.19" |
| Relief Diameter | 6.25" |
| Relief Length | 1.38" |
| RTJ Length | 5.1" |
| Weight (Base @ null") | 133 lbs |
| Weight per Inch | 9.1 lbs/in |
About This Specification
This page contains dimension and weight data for 4" ASME B16.5 flanges at 900 PSI pressure class. The Long Weld Neck (LWN) connection type is specified herein.
Data Source: FCI Forged Components Catalog 2020 | ASME B16.5-2020 Standard