EN 10255 Medium Series Tube Chart
EN 10255 medium series steel tube chart for DN15 to DN150: inch thread designation, OD, wall thickness, ID and plain end kg/m. Labelled drawing.
For preliminary reference and dimensional comparison. Tolerances, pressure capacity and joint safety are not assessed. Confirm against the applicable standard before manufacture or final selection.
Dimension drawing and symbols
- D
- Outside diameter mm
- t
- Medium series wall thickness mm
- di
- Calculated inside diameter mm
The inch designation labels the thread and is not the outside diameter. Inside diameter is di = D − 2t.
Columns
Advanced
Visible rows: 11
Scroll horizontally to see more columns.
| Dimensions, mm | |||||
|---|---|---|---|---|---|
| DN | thread | DOD | twall | diID | masskg/m |
| DN15 | 1/2 | 21.3 | 2.6 | 16.1 | 1.21 |
| DN20 | 3/4 | 26.9 | 2.6 | 21.7 | 1.56 |
| DN25 | 1 | 33.7 | 3.2 | 27.3 | 2.41 |
| DN32 | 1 1/4 | 42.4 | 3.2 | 36.0 | 3.10 |
| DN40 | 1 1/2 | 48.3 | 3.2 | 41.9 | 3.56 |
| DN50 | 2 | 60.3 | 3.6 | 53.1 | 5.03 |
| DN65 | 2 1/2 | 76.1 | 3.6 | 68.9 | 6.42 |
| DN80 | 3 | 88.9 | 4.0 | 80.9 | 8.36 |
| DN100 | 4 | 114.3 | 4.5 | 105.3 | 12.20 |
| DN125 | 5 | 139.7 | 5.0 | 129.7 | 16.60 |
| DN150 | 6 | 165.1 | 5.0 | 155.1 | 19.80 |
Quick answers
- DN15 (1/2 inch) medium series tube: OD 21.3 mm, wall 2.6 mm, ID 16.1 mm, mass 1.21 kg/m. View in table
- DN20 (3/4 inch) medium series tube: OD 26.9 mm, wall 2.6 mm, ID 21.7 mm, mass 1.56 kg/m. View in table
- DN25 (1 inch) medium series tube: OD 33.7 mm, wall 3.2 mm, ID 27.3 mm, mass 2.41 kg/m. View in table
- DN32 (1 1/4 inch) medium series tube: OD 42.4 mm, wall 3.2 mm, ID 36 mm, mass 3.1 kg/m. View in table
- DN40 (1 1/2 inch) medium series tube: OD 48.3 mm, wall 3.2 mm, ID 41.9 mm, mass 3.56 kg/m. View in table
- DN50 (2 inch) medium series tube: OD 60.3 mm, wall 3.6 mm, ID 53.1 mm, mass 5.03 kg/m. View in table
- DN80 (3 inch) medium series tube: OD 88.9 mm, wall 4 mm, ID 80.9 mm, mass 8.36 kg/m. View in table
- DN100 (4 inch) medium series tube: OD 114.3 mm, wall 4.5 mm, ID 105.3 mm, mass 12.2 kg/m. View in table
Conditions and notes
EN 10255:2004+A1:2007 medium series. DN15 to DN150. Mass per length is for bare plain end tubes.
- The inch designation labels the pipe thread. It is not the measured outside diameter in inches.
- Tabulated mass is for plain ends without galvanizing or sockets. Inside diameter is calculated as D − 2t.
- DN150 outside diameter is 165.1 mm. Do not substitute 168.3 mm from other series.
- CSV download is unavailable because the sources do not establish permission for reuse.
Common thread designations, outside diameters, wall thicknesses and bare plain end masses for EN 10255 medium series tubes.
Sources
This table is for preliminary reference. Check the applicable standard and product conditions before use.
- Source 1. Undated numerical table. The referenced edition is stated in the conditions.. Accessed: 2026-10-16
- Source 2. Undated numerical table. The referenced edition is stated in the conditions.. Accessed: 2026-10-16
Data version: 2026-10-16