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
SO
Slip-On Flanges
Slip-on flanges slide over the pipe and are fillet-welded inside and out. They are a practical choice for lower-pressure industrial piping, water systems, and maintenance work where alignment speed matters.
- Standards
- ASME B16.5, ANSI, DIN, EN 1092-1
- Size range
- NPS 1/2–24; DN 15–600
- Pressure class
- Class 150, Class 300, PN10, PN16, PN25, PN40
- Materials
- ASTM A105, A182 F304/F316, Carbon steel
- Facing
- RF, FF
Specification summary
| Standards | ASME B16.5, ANSI, DIN, EN 1092-1 |
|---|---|
| Size range | NPS 1/2–24; DN 15–600 |
| Pressure class | Class 150, Class 300, PN10, PN16, PN25, PN40 |
| Materials | ASTM A105, A182 F304/F316, Carbon steel |
| Facing | RF, FF |
Typical applications
- Industrial piping
- Water and utility lines
- Maintenance and MRO replacement
Manufacturing
Forged and machined slip-on hubs with bore matched to pipe OD. Fillet-weld prep and standard facing are included unless the drawing says otherwise.
Inspection
Dimensional inspection, PMI, UT, MT, hardness testing, and material traceability.
Related flange types
WN 
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