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
JIS B2220
JIS B2220 Flanges
JIS B2220 is the usual Japanese industrial flange standard, specified by nominal size and 5K–30K ratings. Types and drilling follow the JIS table or the buyer drawing on mixed Asian packages.
Specification summary
| Standards | JIS B2220 |
|---|---|
| Size range | 10A–600A, larger on request |
| Pressure class | 5K, 10K, 16K, 20K, 30K |
| Materials | ASTM A105, A182 F304/F316, Equivalent JIS grades |
| Facing | RF, FF |
Typical applications
- Petrochemical
- Power
- Water
- Industrial piping
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
CF Custom Forged Flanges
- Standards
- ASME B16.5, ASME B16.47, DIN
- Size range
- Per drawing
- Pressure
- Per specification
- Materials
- ASTM A105, A350 LF2