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
WN
Weld Neck Flanges
Weld neck flanges are the default choice for high-pressure and cyclic service. The long tapered hub transfers pipe stress into the flange and is used on oil and gas, petrochemical, and power lines specified to ASME B16.5 and B16.47.
- Standards
- ASME B16.5, ASME B16.47, ANSI, EN 1092-1
- Size range
- NPS 1/2–24 (B16.5); NPS 26–60 (B16.47)
- 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
Specification summary
| Standards | ASME B16.5, ASME B16.47, ANSI, EN 1092-1 |
|---|---|
| Size range | NPS 1/2–24 (B16.5); NPS 26–60 (B16.47) |
| 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 pressure piping
- Petrochemical process units
- Power steam and feedwater lines
Manufacturing
Forged, heat-treated, machined, drilled, and marked. Dimensional inspection, PMI, and pressure-class facing are available with the RFQ.
Inspection
Dimensional inspection, PMI, UT, MT, hardness testing, and material traceability.
Related flange types
SO 
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