WN Weld Neck Flanges
- Standards
- ASME B16.5, ASME B16.47, ANSI
- Size range
- NPS 1/2–24 (B16.5); NPS 26–60 (B16.47)
- Pressure
- Class 150, Class 300, Class 600
- Materials
- ASTM A105, A350 LF2
ASME B16.47
ASME B16.47 Flanges
ASME B16.47 covers large-diameter steel flanges, NPS 26 through 60, in Series A and Series B. Use this page when the line size is above B16.5. Weld neck and blind are the usual types; custom drilling follows the drawing.
Specification summary
| Standards | ASME B16.47 |
|---|---|
| Size range | NPS 26–60 |
| Pressure class | Class 150, Class 300, Class 600, Class 900 |
| Materials | ASTM A105, A350 LF2, A182 F304/F316 |
| Facing | RF, FF, RTJ |
Typical applications
- Oil and gas
- Petrochemical
- Power
Flange types quoted to this standard
WN 
BL Blind Flanges
- Standards
- ASME B16.5, ASME B16.47, DIN
- Size range
- NPS 1/2–24 (B16.5); larger on request
- Pressure
- Class 150, Class 300, Class 600
- Materials
- ASTM A105, A350 LF2
CF Custom Forged Flanges
- Standards
- ASME B16.5, ASME B16.47, DIN
- Size range
- Per drawing
- Pressure
- Per specification
- Materials
- ASTM A105, A350 LF2