Flange drilling NB 50 PN 6 — IS 6392
Flange drilling NB 50 PN 6 to IS 6392: outside dia 140 mm, pcd 110 mm, no. of bolts 4, thickness 16 mm.
Dimensions of Flange drilling NB 50 PN 6
| Symbol | Dimension | Value |
|---|---|---|
| · | Outside dia | 140 mm (5.512 in) |
| · | PCD | 110 mm (4.331 in) |
| · | No. of bolts | 4 |
| · | Bolt size | M12 |
| · | Thickness | 16 mm (0.630 in) |
SKU TSH-FLANGE-IS-6392-PN-6-50 · Standard IS 6392 · single source — verify
Purchase description
FLANGE DRILLING, NB 50, PN 6, ASTM A105N, IS 6392
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
- IS 6392 Table 5, plate flanges for welding, 0.60 N/mm2.
- All rows from AGL Pipe Products' transcription (one other unnamed transcription matched 15-300). Treat as single-source.
- 350 NB OD shown as 493 (EN 1092-1 PN6 is 490) — check. 450 and 600 NB incomplete/not found (600: OD 755, t 32 only).
Same size, other ratings
Other sizes — Flange drilling, PN 6
NB 15NB 20NB 25NB 32NB 40NB 65NB 80NB 100NB 125NB 150NB 200NB 250NB 300NB 350NB 400NB 500
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.