Flange drilling NB 80 PN 16 — IS 6392
Flange drilling NB 80 PN 16 to IS 6392: outside dia 200 mm, pcd 160 mm, no. of bolts 8, thickness 20 mm.
Dimensions of Flange drilling NB 80 PN 16
| Symbol | Dimension | Value |
|---|---|---|
| · | Outside dia | 200 mm (7.874 in) |
| · | PCD | 160 mm (6.299 in) |
| · | No. of bolts | 8 |
| · | Bolt size | M16 |
| · | Thickness | 20 mm (0.787 in) |
SKU TSH-FLANGE-IS-6392-PN-16-80 · Standard IS 6392 · single source — verify
Purchase description
FLANGE DRILLING, NB 80, PN 16, 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 17, plate flanges for welding, 1.6 N/mm2.
- 15-175 NB: two sources agree (pm-industries, Diamond Flanges/AGL) — verified.
- 200-300 NB: AGL Pipe Products only (hole dia 22/26/26). 350-600 NB: Vinesh Steel only (hole dia 26/30/33/36; bolt sizes not stated). These rows are single-source.
- Diamond Flanges' scan shows different 200/250 values (e.g. 200 NB OD 575, M27) that look like transcription errors or another table; not used.
- 450 NB not found.
Same size, other ratings
Other sizes — Flange drilling, PN 16
NB 15NB 20NB 25NB 32NB 40NB 50NB 65NB 100NB 125NB 150NB 175NB 200NB 250NB 300NB 350NB 400NB 500NB 600
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.