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 B16.5
ASME B16.5 Flanges
ASME B16.5 covers pipe flanges from NPS 1/2 through 24. It is the default North American and export specification for weld neck, slip-on, blind, socket weld, threaded, and lap joint flanges in Class 150 through 2500.
Specification summary
| Standards | ASME B16.5 |
|---|---|
| Size range | NPS 1/2–24 |
| Pressure class | Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500 |
| Materials | ASTM A105, A350 LF2, A182 F304/F316, Alloy steel |
| Facing | RF, FF, RTJ |
Typical applications
- Oil and gas
- Petrochemical
- Power
- Water
Flange types quoted to this standard
WN 
SO Slip-On Flanges
- Standards
- ASME B16.5, ANSI, DIN
- Size range
- NPS 1/2–24; DN 15–600
- Pressure
- Class 150, Class 300, PN10
- Materials
- ASTM A105, A182 F304/F316
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
SW Socket Weld Flanges
- Standards
- ASME B16.5, ANSI
- Size range
- NPS 1/2–4
- Pressure
- Class 150, Class 300, Class 600
- Materials
- ASTM A105, A182 F304/F316
THD Threaded Flanges
- Standards
- ASME B16.5, ANSI
- Size range
- NPS 1/2–4, larger on request
- Pressure
- Class 150, Class 300
- Materials
- ASTM A105, A182 F304/F316
LJ Lap Joint Flanges
- Standards
- ASME B16.5, ANSI
- Size range
- NPS 1/2–24
- Pressure
- Class 150, Class 300
- Materials
- ASTM A105, A182 F304/F316
CF Custom Forged Flanges
- Standards
- ASME B16.5, ASME B16.47, DIN
- Size range
- Per drawing
- Pressure
- Per specification
- Materials
- ASTM A105, A350 LF2