FITTINGS & FLANGES
F304 raised-face weld neck flange
WN / Class 150 / RF / F304
- Dimensional series
- ASME B16.5，Class 150
- Facing
- RF — raised face
- Connection form
- Butt weld, tapered neck
- Material selection
- ASTM A182 F304 — photo marking; confirm material certificate
- Pressure–temperature rating
- Depends on material group and temperature; Class 150 is a class designation
Confirm configuration, price, quantity and lead time for each enquiry.
Class 150 RF — selected NPS size rows
Units: in
| NPS (in) | O — flange OD | T — body thickness | R — raised-face diameter | X — hub base diameter | Holes × diameter | Bolt circle | B₂ — standard bore | H — weld-end OD | L₂ — weld-neck length |
|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 3.50 | 0.38 | 1.38 | 1.19 | 4 × 0.62 | 2.38 | 0.62 | 0.84 | 1.81 |
| 3/4 | 3.88 | 0.44 | 1.69 | 1.50 | 4 × 0.62 | 2.75 | 0.82 | 1.05 | 2.00 |
| 1 | 4.25 | 0.50 | 2.00 | 1.94 | 4 × 0.62 | 3.12 | 1.05 | 1.32 | 2.12 |
| 1 1/2 | 5.00 | 0.62 | 2.88 | 2.56 | 4 × 0.62 | 3.88 | 1.61 | 1.90 | 2.38 |
| 2 | 6.00 | 0.69 | 3.62 | 3.06 | 4 × 0.75 | 4.75 | 2.07 | 2.38 | 2.44 |
| 3 | 7.50 | 0.88 | 5.00 | 4.25 | 4 × 0.75 | 6.00 | 3.07 | 3.50 | 2.69 |
| 4 | 9.00 | 0.88 | 6.19 | 5.31 | 8 × 0.75 | 7.50 | 4.03 | 4.50 | 2.94 |
| 6 | 11.00 | 0.94 | 8.50 | 7.56 | 8 × 0.88 | 9.50 | 6.07 | 6.63 | 3.44 |
Dimensions are in inches. T and the length symbols follow the source cross-section; the raised face is shown separately as 1/16 in. B₂ is the source standard bore, not a universal bore for every pipe schedule. Confirm the ordered bore and material grade.
Specifications compiled from available product documents，Document page: 3。Dimensions, performance and suitability are subject to confirmed drawings and ordering documents.
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