IS 6392 — PN 2.5 (Table 2) — weld-neck flanges
IS 6392 PN 2.5 (Table 2) — weld-neck flanges — 5 sizes.
| Size | A — Pipe OD (mm) | D — Flange OD (mm) | C — Weld neck (mm) | H — WN length (mm) | N — Hub / neck dia (mm) | d1 — Raised face (mm) | f — RF height (mm) | K — Bolt circle (mm) | n — Bolts | L — Hole dia (mm) | Bolt — Size |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1200 | 1220 | 1375 | 26 | 70 | 1245 | 1280 | 5 | 1320 | 32 | 30 | M27 |
| 1400 | 1420 | 1575 | 26 | 70 | 1445 | 1480 | 5 | 1520 | 36 | 30 | M27 |
| 1600 | 1620 | 1790 | 26 | 80 | 1645 | 1690 | 5 | 1730 | 40 | 30 | M27 |
| 1800 | 1820 | 1990 | 26 | 80 | 1845 | 1890 | 5 | 1930 | 44 | 30 | M27 |
| 2000 | 2020 | 2190 | 26 | 80 | — | 2090 | 5 | 2130 | 48 | 30 | M27 |
- All dimensions are in millimetres.
- IS 6392 tabulates PN 2.5 only for DN 1200–2000; for smaller sizes the standard refers to the PN 6 tables.
- IS 6392 drilling follows the ISO/DIN metric series, so IS 6392 flanges generally mate with EN 1092-1 / DIN flanges of the same PN — check the raised face and thickness for your flange type.
- Values are nominal, compiled from published copies of the standard; blank cells (—) are values not confirmed from the sources available. Verify against the current edition before design, purchase or fabrication.