IS 6392 — Flange drilling — PN 16
IS 6392 Flange drilling — PN 16 — 19 sizes. Single-source reference — verify before use.
| NB | Outside dia (mm) | PCD (mm) | No. of bolts | Bolt size | Thickness (mm) |
|---|---|---|---|---|---|
| 15 | 95 | 65 | 4 | M12 | 14 |
| 20 | 105 | 75 | 4 | M12 | 16 |
| 25 | 115 | 85 | 4 | M12 | 16 |
| 32 | 140 | 100 | 4 | M16 | 16 |
| 40 | 150 | 110 | 4 | M16 | 16 |
| 50 | 165 | 125 | 4 | M16 | 18 |
| 65 | 185 | 145 | 4 | M16 | 18 |
| 80 | 200 | 160 | 8 | M16 | 20 |
| 100 | 220 | 180 | 8 | M16 | 20 |
| 125 | 250 | 210 | 8 | M16 | 22 |
| 150 | 285 | 240 | 8 | M20 | 22 |
| 175 | 315 | 270 | 8 | — | 24 |
| 200 | 340 | 295 | 12 | M20 | 24 |
| 250 | 405 | 355 | 12 | M24 | 26 |
| 300 | 460 | 410 | 12 | M24 | 28 |
| 350 | 520 | 470 | 16 | — | 32 |
| 400 | 580 | 525 | 16 | — | 36 |
| 500 | 715 | 650 | 20 | — | 44 |
| 600 | 840 | 770 | 20 | — | 52 |
- 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.
Sources: law.resource.org/pub/in/bis/S10/is.6392.1971.pdf · pm-industries.com/is-6392-flanges-standard-dimensions/ · diamondflanges.com/cimage11/105319is_6392.pdf · aglpipeproducts.com/is-6392-1971-plate-flanges/ · sainiflange.co.in/6392-table17.php · vineshsteel.com/is-6392-flanges.html