EN 1092-1 Flange Dimensions Chart (PN 10 and PN 16)
EN 1092-1 flange dimensions for steel flanges DN 15 to DN 600 in PN 10 and PN 16: outside diameter D, bolt circle K, number and size of bolts, hole diameter L.
For preliminary reference only and not a substitute for the standard. Flange thickness, gaskets, bolt length, material and temperature dependent allowable pressure are not covered. Confirm the dimensions in the current edition of EN 1092-1 before ordering or manufacture.
Dimension drawing and symbols
- D
- Flange outside diameter mm
- K
- Bolt circle diameter mm
- L
- Bolt hole diameter mm
D is the flange outside diameter, K the bolt circle diameter and L the bolt hole diameter. The bolts column gives the number of bolts and the metric thread size. Thickness, hub and facing dimensions are not in this table.
Columns
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Visible rows: 19
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| PN 10 | PN 16 | |||||||
|---|---|---|---|---|---|---|---|---|
| DN | DODmm | Kbolt circlemm | bolts | Lholemm | DODmm | Kbolt circlemm | bolts | Lholemm |
| DN15 | 95 | 65 | 4 × M12 | 14 | 95 | 65 | 4 × M12 | 14 |
| DN20 | 105 | 75 | 4 × M12 | 14 | 105 | 75 | 4 × M12 | 14 |
| DN25 | 115 | 85 | 4 × M12 | 14 | 115 | 85 | 4 × M12 | 14 |
| DN32 | 140 | 100 | 4 × M16 | 18 | 140 | 100 | 4 × M16 | 18 |
| DN40 | 150 | 110 | 4 × M16 | 18 | 150 | 110 | 4 × M16 | 18 |
| DN50 | 165 | 125 | 4 × M16 | 18 | 165 | 125 | 4 × M16 | 18 |
| DN65 | 185 | 145 | 8 × M16 | 18 | 185 | 145 | 8 × M16 | 18 |
| DN80 | 200 | 160 | 8 × M16 | 18 | 200 | 160 | 8 × M16 | 18 |
| DN100 | 220 | 180 | 8 × M16 | 18 | 220 | 180 | 8 × M16 | 18 |
| DN125 | 250 | 210 | 8 × M16 | 18 | 250 | 210 | 8 × M16 | 18 |
| DN150 | 285 | 240 | 8 × M20 | 22 | 285 | 240 | 8 × M20 | 22 |
| DN200 | 340 | 295 | 8 × M20 | 22 | 340 | 295 | 12 × M20 | 22 |
| DN250 | 395 | 350 | 12 × M20 | 22 | 405 | 355 | 12 × M24 | 26 |
| DN300 | 445 | 400 | 12 × M20 | 22 | 460 | 410 | 12 × M24 | 26 |
| DN350 | 505 | 460 | 16 × M20 | 22 | 520 | 470 | 16 × M24 | 26 |
| DN400 | 565 | 515 | 16 × M24 | 26 | 580 | 525 | 16 × M27 | 30 |
| DN450 | 615 | 565 | 20 × M24 | 26 | 640 | 585 | 20 × M27 | 30 |
| DN500 | 670 | 620 | 20 × M24 | 26 | 715 | 650 | 20 × M30 | 33 |
| DN600 | 780 | 725 | 20 × M27 | 30 | 840 | 770 | 20 × M33 | 36 |
Quick answers
- DN50 PN 16 flange: D 165 mm, K 125 mm, 4 × M16 bolts, hole L 18 mm. For PN 10: D 165 mm, K 125 mm, 4 × M16 bolts. View in table
- DN80 PN 16 flange: D 200 mm, K 160 mm, 8 × M16 bolts, hole L 18 mm. For PN 10: D 200 mm, K 160 mm, 8 × M16 bolts. View in table
- DN100 PN 16 flange: D 220 mm, K 180 mm, 8 × M16 bolts, hole L 18 mm. For PN 10: D 220 mm, K 180 mm, 8 × M16 bolts. View in table
- DN150 PN 16 flange: D 285 mm, K 240 mm, 8 × M20 bolts, hole L 22 mm. For PN 10: D 285 mm, K 240 mm, 8 × M20 bolts. View in table
- DN200 PN 16 flange: D 340 mm, K 295 mm, 12 × M20 bolts, hole L 22 mm. For PN 10: D 340 mm, K 295 mm, 8 × M20 bolts. View in table
- DN250 PN 16 flange: D 405 mm, K 355 mm, 12 × M24 bolts, hole L 26 mm. For PN 10: D 395 mm, K 350 mm, 12 × M20 bolts. View in table
- DN300 PN 16 flange: D 460 mm, K 410 mm, 12 × M24 bolts, hole L 26 mm. For PN 10: D 445 mm, K 400 mm, 12 × M20 bolts. View in table
- DN400 PN 16 flange: D 580 mm, K 525 mm, 16 × M27 bolts, hole L 30 mm. For PN 10: D 565 mm, K 515 mm, 16 × M24 bolts. View in table
Conditions and notes
Connection dimensions of EN 1092-1 steel flanges. Sources cite the 2002 and 2013 editions and give the same values for these cells. Values are in millimetres and do not depend on the flange type.
- DN 65 steel flanges have 8 bolt holes. According to the source notes, 4 holes may be used by agreement. Cast iron and copper alloy flanges may come with 4 holes, so check the mating flange.
- PN 10 and PN 16 flanges mate up to and including DN 150. At DN 200 the bolt count differs, and from DN 250 the outside diameter, bolt circle and bolt size also change.
- The bolts column gives only the number and metric thread size. Bolt length depends on flange thickness, gasket and nut arrangement.
- This table summarises only the key connection dimensions of the standard and cannot be downloaded as CSV. The standard itself is a paid document with the full set of dimensions.
- CSV download is unavailable because the sources do not establish permission for reuse.
Connection dimensions of EN 1092-1 steel flanges. PN 10 and PN 16 share the same dimensions up to and including DN 150. From DN 200 the two pressure classes differ, so match the mating flange by PN.
Sources
This table is for preliminary reference. Check the applicable standard and product conditions before use.
- Source 1. DIN EN 1092-1:2013 cited, data sheet dated 04/2018. Accessed: 2026-10-16
- Source 2. DIN EN 1092-1 cited, March 2018 edition. Accessed: 2026-10-16
- Source 3. Undated numerical table. The referenced edition is stated in the conditions.. Accessed: 2026-10-16
- Source 4. Undated numerical table. The referenced edition is stated in the conditions.. Accessed: 2026-10-16
- Source 5. Undated numerical table. The referenced edition is stated in the conditions.. Accessed: 2026-10-16
- Source 6. Undated numerical table. The referenced edition is stated in the conditions.. Accessed: 2026-10-16
Data version: 2026-10-16