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
BL
Blind Flanges
Blind flanges close the end of a pipe, valve, or vessel nozzle. They are supplied by size, pressure class, material, and facing so isolation, hydrotest, and future tie-ins stay in spec.
- Standards
- ASME B16.5, ASME B16.47, DIN, EN 1092-1
- Size range
- NPS 1/2–24 (B16.5); larger on request
- Pressure class
- Class 150, Class 300, Class 600, Class 900, PN10, PN16
- Materials
- ASTM A105, A350 LF2, A182 F304/F316
- Facing
- RF, FF, RTJ
Specification summary
| Standards | ASME B16.5, ASME B16.47, DIN, EN 1092-1 |
|---|---|
| Size range | NPS 1/2–24 (B16.5); larger on request |
| Pressure class | Class 150, Class 300, Class 600, Class 900, PN10, PN16 |
| Materials | ASTM A105, A350 LF2, A182 F304/F316 |
| Facing | RF, FF, RTJ |
Typical applications
- Pipeline isolation and hydrotest
- Vessel and nozzle closures
- Future tie-in points
Manufacturing
Solid forged blinds, faced and drilled to the matching standard. RTJ grooves and special thicknesses follow the purchase order or drawing.
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