Plate & blind flange NB 1000 Class 300 — ASME B16.47 Series B
Plate & blind flange NB 1000 Class 300 to ASME B16.47 Series B: outside dia 1275 mm, pcd 1190.6 mm, no. of holes 40, hole dia 44.5 mm, rf dia 1114 mm.
Dimensions of Plate & blind flange NB 1000 Class 300
| Symbol | Dimension | Value |
|---|---|---|
| OD | Outside dia | 1275 mm (50.197 in) |
| · | PCD | 1190.6 mm (46.874 in) |
| · | No. of holes | 40 |
| · | Hole dia | 44.5 mm (1.752 in) |
| · | RF dia | 1114 mm (43.858 in) |
| · | RF height | 2 mm (0.079 in) |
| · | Bore / ID (plate) | 1023.9 mm (40.311 in) |
| · | Thickness — plate RF | 114.3 mm (4.500 in) |
| · | Thickness — plate FF | 112.3 mm (4.421 in) |
| · | Thickness — blind RF | 114.3 mm (4.500 in) |
| · | Thickness — blind FF | 112.3 mm (4.421 in) |
| · | Teshi QC flag | STD~ID: PLATE; CHECK: PLATE FF/BLIND FF; STD: BLIND |
SKU TSH-FLANGE-ASME-B16-47-SERIES-B-CLASS-300-1000 · Standard ASME B16.47 Series B · Teshi master data
Purchase description
PLATE & BLIND FLANGE, NB 1000, CLASS 300, ASTM A105N, ASME B16.47 SERIES B
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).
Same size, other ratings
Other sizes — Plate & blind flange, Class 300
NB 650NB 700NB 750NB 800NB 850NB 900NB 950NB 1050NB 1100NB 1150NB 1200NB 1250NB 1300NB 1350NB 1400NB 1450NB 1500
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.