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
LJ
Lap Joint Flanges
Lap joint flanges work with a stub end so the flange can rotate for bolt alignment. They suit lined pipe, frequent dismantling, and systems that need the stub end in a higher-grade alloy than the backing flange.
- Standards
- ASME B16.5, ANSI
- Size range
- NPS 1/2–24
- Pressure class
- Class 150, Class 300
- Materials
- ASTM A105, A182 F304/F316
- Facing
- Flat face for stub end
Specification summary
| Standards | ASME B16.5, ANSI |
|---|---|
| Size range | NPS 1/2–24 |
| Pressure class | Class 150, Class 300 |
| Materials | ASTM A105, A182 F304/F316 |
| Facing | Flat face for stub end |
Typical applications
- Lined and frequent-dismantle piping
- Alloy stub end with carbon backing flange
- Alignment-sensitive joints
Manufacturing
Backing flanges are forged and bored for the stub-end radius. Stub ends can be quoted with the flange or supplied by others.
Inspection
Dimensional inspection, PMI, UT, MT, hardness testing, and material traceability.
Related flange types
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
CF Custom Forged Flanges
- Standards
- ASME B16.5, ASME B16.47, DIN
- Size range
- Per drawing
- Pressure
- Per specification
- Materials
- ASTM A105, A350 LF2