Plate & blind flange NB 900 Class E — AWWA C207
Plate & blind flange NB 900 Class E to AWWA C207: outside dia 1168.4 mm, bore / id (plate) 919.2 mm, thickness — plate rf 79.4 mm, thickness — blind rf 81.5 mm.
Dimensions of Plate & blind flange NB 900 Class E
| Symbol | Dimension | Value |
|---|---|---|
| OD | Outside dia | 1168.4 mm (46.000 in) |
| · | Bore / ID (plate) | 919.2 mm (36.189 in) |
| · | Thickness — plate RF | 79.4 mm (3.126 in) |
| · | Thickness — blind RF | 81.5 mm (3.209 in) |
| · | Teshi QC flag | STD |
SKU TSH-FLANGE-AWWA-C207-CLASS-E-900 · Standard AWWA C207 · Teshi master data
Purchase description
PLATE & BLIND FLANGE, NB 900, CLASS E, ASTM A105N, AWWA C207
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.
- PLATE FF thickness identical to PLATE thickness for every size; FF column omitted.
- BLIND FF thickness identical to BLIND thickness for every size; FF column 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.
- From 78 in upward the source gives blind thickness equal to plate thickness and flags those blind rows CHECK.
Same size, other ratings
Other sizes — Plate & blind flange, Class E
NB 100NB 125NB 150NB 200NB 250NB 300NB 350NB 400NB 450NB 500NB 550NB 600NB 650NB 700NB 750NB 800NB 850NB 950NB 1000NB 1050NB 1100NB 1150NB 1200NB 1250NB 1300NB 1350NB 1500NB 1650NB 1800NB 1950NB 2100NB 2250NB 2400NB 2550NB 2700NB 2850NB 3000NB 3150NB 3300NB 3600
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.