FITTINGS & FLANGES
Raised-face blind flange
BL / Class 150 / RF
- Dimensional series
- ASME B16.5，Class 150
- Facing
- RF — raised face
- Connection form
- Bolted closure; no flow bore
- Material selection
- Specify ASTM A105 or the required ASTM A182 grade
- 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 | Holes × diameter | Bolt circle |
|---|---|---|---|---|---|
| 1/2 | 3.50 | 0.38 | 1.38 | 4 × 0.62 | 2.38 |
| 3/4 | 3.88 | 0.44 | 1.69 | 4 × 0.62 | 2.75 |
| 1 | 4.25 | 0.50 | 2.00 | 4 × 0.62 | 3.12 |
| 1 1/2 | 5.00 | 0.62 | 2.88 | 4 × 0.62 | 3.88 |
| 2 | 6.00 | 0.69 | 3.62 | 4 × 0.75 | 4.75 |
| 3 | 7.50 | 0.88 | 5.00 | 4 × 0.75 | 6.00 |
| 4 | 9.00 | 0.88 | 6.19 | 8 × 0.75 | 7.50 |
| 6 | 11.00 | 0.94 | 8.50 | 8 × 0.88 | 9.50 |
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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