Plate & blind flange NB 50 Table D — BS 10
Plate & blind flange NB 50 Table D to BS 10: outside dia 152.4 mm, bore / id (plate) 62.3 mm, thickness — plate rf 7.9 mm, thickness — plate ff 7.9 mm, thickness — blind rf 7.9 mm.
Dimensions of Plate & blind flange NB 50 Table D
| Symbol | Dimension | Value |
|---|---|---|
| OD | Outside dia | 152.4 mm (6.000 in) |
| · | Bore / ID (plate) | 62.3 mm (2.453 in) |
| · | Thickness — plate RF | 7.9 mm (0.311 in) |
| · | Thickness — plate FF | 7.9 mm (0.311 in) |
| · | Thickness — blind RF | 7.9 mm (0.311 in) |
| · | Thickness — blind FF | 7.9 mm (0.311 in) |
| · | PCD (web ref.) | 114.3 mm (4.500 in) |
| · | No. of bolts (web ref.) | 4 |
| · | Bolt size (web ref.) | 15.9 mm (0.626 in) |
| · | Teshi QC flag | STD~ID |
SKU TSH-FLANGE-BS-10-TABLE-D-50 · Standard BS 10 · Teshi master data
Purchase description
PLATE & BLIND FLANGE, NB 50, TABLE D, ASTM A105N, BS 10
Available materials: ASTM A105N, ASTM A350 LF2 Cl 1, ASTM A182 F304/304L, ASTM A182 F316/316L, ASTM A182 F11 Cl 2, ASTM A182 F22 Cl 3, ASTM A182 F51 (Duplex), ASTM A182 F53 (Super Duplex), ASTM A694 F52 / F60, IS 2062 E250 (plate).
Notes
- Blind rows record ID as [0.0] in source; omitted.
- Source has no values for: PCD, No. of holes, Hole dia, RF dia, RF height.
- Verified flag values are copied from the source: 'STD', 'STD~ID' or 'CHECK'. The source does not define them; 'STD~ID' presumably means standard dimensions with a derived/non-standard ID, and 'CHECK' rows were flagged for review.
- Size column is the NB taken from the source Key (e.g. 'NB150'); 'Size label in source' is the Size cell as typed.
- Source also holds a duplicate set under DimStd 'BS 10 TABLE D' (no rating); it was checked and is identical to these rows, so it is not repeated.
- Suspicious: FF thickness is GREATER than RF thickness from 300 NB up (e.g. 300 NB 19.1 FF vs 15.9 RF) - recorded as in source.
- PCD and bolting from web reference 'BS 10 BS 10 flanges — Table D' (verified); matched 22 of 22 sizes. Verify drilling before machining.
Same size, other ratings
Other sizes — Plate & blind flange, Table D
NB 15NB 20NB 25NB 32NB 40NB 65NB 80NB 90NB 100NB 125NB 150NB 175NB 200NB 225NB 250NB 300NB 350NB 400NB 450NB 500NB 600
Frequently asked questions
What are the main types of pipe flanges?
Weld neck (WN), slip-on (SO), blind (BL), socket weld (SW), threaded (THD), lap joint (LJ) and plate flanges. Special types include orifice, long weld neck, reducing flanges and spectacle blinds.
When should I use a weld neck flange instead of a slip-on?
Use weld neck flanges for high pressure, high or cycling temperature, and lines with vibration or fatigue loading. The tapered hub and full-penetration butt weld spread stress smoothly. Slip-on flanges are cheaper and easier to align, but their fatigue life is roughly one third of a WN.
What does Class 150, 300 or 600 mean on a flange?
The ASME class is a pressure-rating designation, not a pressure in psi. The allowable pressure depends on the material group and temperature. A Class 150 A105 flange is rated 19.6 bar at 38 °C but 13.8 bar at 200 °C.
Is a 150# flange rated for 150 psi?
No. A Class 150 carbon-steel flange is rated about 285 psi (19.6 bar) at ambient temperature, and about 170 psi (11.7 bar) at 260 °C. The "150" is a class number.