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
SW
Socket Weld Flanges
Socket weld flanges are compact forged fittings for small-bore, high-pressure process lines. The pipe sits in the socket and is fillet-welded, which suits instrument, hydraulic, and compact skid piping.
- Standards
- ASME B16.5, ANSI
- Size range
- NPS 1/2–4
- Pressure class
- Class 150, Class 300, Class 600, Class 1500
- Materials
- ASTM A105, A182 F304/F316, A182 F11/F22
- Facing
- RF, RTJ
Specification summary
| Standards | ASME B16.5, ANSI |
|---|---|
| Size range | NPS 1/2–4 |
| Pressure class | Class 150, Class 300, Class 600, Class 1500 |
| Materials | ASTM A105, A182 F304/F316, A182 F11/F22 |
| Facing | RF, RTJ |
Typical applications
- Small-bore process piping
- Hydraulic and instrument lines
- Compact skid packages
Manufacturing
Small-bore sockets are forged and bored to the pipe OD with a defined setback. Facing and drilling follow the class on the RFQ.
Inspection
Dimensional inspection, PMI, UT, MT, hardness testing, and material traceability.
Related flange types
THD 
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
CF Custom Forged Flanges
- Standards
- ASME B16.5, ASME B16.47, DIN
- Size range
- Per drawing
- Pressure
- Per specification
- Materials
- ASTM A105, A350 LF2