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
GB/T
GB/T and HG/T Flanges
Chinese domestic and mixed export orders specify GB/T 9115, GB/T 9119, and HG/T 20592 by DN and PN. ASME types can ship on the same order when the package mixes GB and export specs.
Specification summary
| Standards | GB/T |
|---|---|
| Size range | DN 15–600, larger on request |
| Pressure class | PN10, PN16, PN25, PN40 |
| Materials | 20 / 16Mn, 304 / 316L, LF2 equivalent, Alloy steel |
| Facing | RF, FF |
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
CF Custom Forged Flanges
- Standards
- ASME B16.5, ASME B16.47, DIN
- Size range
- Per drawing
- Pressure
- Per specification
- Materials
- ASTM A105, A350 LF2