Series B Class 150 (mm) 32"" — ASME B16.47
Series B Class 150 (mm) 32"" to ASME B16.47: dn 800, o — outside dia 940 mm, tf — weld neck 44.6 mm, tf — blind 52.5 mm, x — hub dia 840 mm.
Dimensions of Series B Class 150 (mm) 32""
| Symbol | Dimension | Value |
|---|---|---|
| · | DN | 800 |
| · | O — Outside dia | 940 mm (37.008 in) |
| · | tf — Weld neck | 44.6 mm (1.756 in) |
| · | tf — Blind | 52.5 mm (2.067 in) |
| · | X — Hub dia | 840 mm (33.071 in) |
| · | A — Hub at weld | 814.3 mm (32.059 in) |
| · | Y — Length thru hub | 106 mm (4.173 in) |
| · | R — Raised face dia | 864 mm (34.016 in) |
| · | W — Bolt circle | 900.1 mm (35.437 in) |
| · | Holes — No. | 48 |
| · | Hole dia — mm | 22.2 mm (0.874 in) |
| · | Bolt — in | ¾" in |
SKU TSH-FLANGE-ASME-B16-47-32" · Standard ASME B16.47 · teshi-web
Purchase description
SERIES B CLASS 150 (MM), 32"", ASTM A105N, ASME B16.47
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
- Dimensions are in millimetres unless stated otherwise.
- Thickness and hub length exclude the raised face: 2 mm for Class 150 and 300.
- Bolt holes are tabulated in inches in the standard; millimetre values are direct conversions.
- Some dimensions do not increase uniformly with size (for example Class 300 thickness at NPS 54" and 60"). This follows the standard.
Other sizes — Series B Class 150 (mm), Standard
26""28""30""34""36""38""40""42""44""46""48""50""52""54""56""58""60""
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.