Class 900 Flange Dimensions 36" — MSS SP-44
Class 900 Flange Dimensions 36" to MSS SP-44: o — flange od · in 57.5 in, tf — min. thickness · in 6.75 in, x — hub dia · in 41.88 in, y — length thru hub · in 14.25 in, r — raised face · in 40.25 in.
Dimensions of Class 900 Flange Dimensions 36"
| Symbol | Dimension | Value |
|---|---|---|
| · | O — Flange OD · in | 57.5 in |
| · | tf — Min. thickness · in | 6.75 in |
| · | X — Hub dia · in | 41.88 in |
| · | Y — Length thru hub · in | 14.25 in |
| · | R — Raised face · in | 40.25 in |
| · | W — Bolt circle · in | 50.75 in |
| · | Bolts — No. | 20 |
| · | Hole — Dia · in | 3.62 in |
| · | Bolt — Size · in | 3-1/2 in |
SKU TSH-FLANGE-MSS-SP-44-36 · Standard MSS SP-44 · teshi-web
Purchase description
CLASS 900 FLANGE DIMENSIONS, 36", ASTM A105N, MSS SP-44
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
- All dimensions are in inches (1 in = 25.4 mm).
- Class 400 and above thickness and hub length exclude the 0.25 in raised face.
- NPS 26–60 dimensions are identical to ASME B16.47 Series A; the difference is material (A694 high-yield grades).
- Values are nominal, compiled from published copies of the standard; blank cells (—) are values not confirmed from the sources available. Verify against the current edition before design, purchase or fabrication.
Other sizes — Class 900 Flange Dimensions, Standard
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.