Spade & ring spacer 4" Class 150 — ASME B16.48
Spade & ring spacer 4" Class 150 to ASME B16.48: outside dia. a 172 mm, inside dia. b (spacer) 114 mm, centre to handle end c 202 mm, thickness t 9.7 mm, handle width w 38 mm.
Dimensions of Spade & ring spacer 4" Class 150
| Symbol | Dimension | Value |
|---|---|---|
| A | Outside dia | 172 mm (6.772 in) |
| B | Inside dia. (spacer) | 114 mm (4.488 in) |
| C | Centre to handle end | 202 mm (7.953 in) |
| t | Thickness | 9.7 mm (0.382 in) |
| W | Handle width | 38 mm (1.496 in) |
SKU TSH-BLANK-ASME-B16-48-CLASS-150-4 · Standard ASME B16.48
Purchase description
SPADE & RING SPACER, 4", CLASS 150, ASTM A105N, ASME B16.48
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
- Spade = solid paddle (B not applicable); ring spacer uses bore B. C is the centre-to-handle-end dimension; handle length not given separately.
- C values differ from spectacle blind C — do not mix.
Other sizes — Spade & ring spacer, Class 150
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.