PP-R Pipe Dimensions Chart (SDR 5 to 11)
PPR pipe size chart: wall thickness and inside diameter for SDR 11, 7.4, 6 and 5 at 16 to 160 mm outside diameter, with the usual PN match. Hot and cold water, drawing.
For preliminary reference. Allowable pressure in hot water is clearly lower than the PN and depends on temperature, service life and whether the material is PP-R or PP-RCT. Use the manufacturer's pressure and temperature table for selection.
Dimension drawing and symbols
- dn
- Nominal outside diameter mm
- en
- Nominal wall thickness mm
- di
- Calculated inside diameter mm
dₙ is the nominal outside diameter, eₙ the nominal wall thickness and dᵢ the calculated inside diameter. SDR = dₙ / eₙ. A lower SDR means a thicker wall and a higher pressure class.
Columns
Advanced
Visible rows: 12
Wall thickness
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| Nominal wall thickness en, mm | ||||
|---|---|---|---|---|
| dnODmm | SDR 11 | SDR 7.4 | SDR 6 | SDR 5 |
| 16 | no value | 2.2 | 2.7 | no value |
| 20 | 1.9 | 2.8 | 3.4 | 4.1 |
| 25 | 2.3 | 3.5 | 4.2 | 5.1 |
| 32 | 2.9 | 4.4 | 5.4 | 6.5 |
| 40 | 3.7 | 5.5 | 6.7 | 8.1 |
| 50 | 4.6 | 6.9 | 8.3 | 10.1 |
| 63 | 5.8 | 8.6 | 10.5 | 12.7 |
| 75 | 6.8 | 10.3 | 12.5 | 15.1 |
| 90 | 8.2 | 12.3 | 15.0 | 18.1 |
| 110 | 10.0 | 15.1 | 18.3 | 22.1 |
| 125 | 11.4 | 17.1 | 20.8 | 25.1 |
| 160 | 14.6 | 21.9 | 26.6 | 32.1 |
Inside diameter
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| Calculated inside diameter di, mm | ||||
|---|---|---|---|---|
| dnODmm | SDR 11 | SDR 7.4 | SDR 6 | SDR 5 |
| 16 | no value | 11.6 | 10.6 | no value |
| 20 | 16.2 | 14.4 | 13.2 | 11.8 |
| 25 | 20.4 | 18.0 | 16.6 | 14.8 |
| 32 | 26.2 | 23.2 | 21.2 | 19.0 |
| 40 | 32.6 | 29.0 | 26.6 | 23.8 |
| 50 | 40.8 | 36.2 | 33.4 | 29.8 |
| 63 | 51.4 | 45.8 | 42.0 | 37.6 |
| 75 | 61.4 | 54.4 | 50.0 | 44.8 |
| 90 | 73.6 | 65.4 | 60.0 | 53.8 |
| 110 | 90.0 | 79.8 | 73.4 | 65.8 |
| 125 | 102.2 | 90.8 | 83.4 | 74.8 |
| 160 | 130.8 | 116.2 | 106.8 | 95.8 |
Quick answers
- 20 mm PP-R pipe: SDR 11 wall 1.9 mm, SDR 7.4 wall 2.8 mm with ID 14.4 mm, SDR 6 wall 3.4 mm. View in table
- 25 mm PP-R pipe: SDR 11 wall 2.3 mm, SDR 7.4 wall 3.5 mm with ID 18 mm, SDR 6 wall 4.2 mm. View in table
- 32 mm PP-R pipe: SDR 11 wall 2.9 mm, SDR 7.4 wall 4.4 mm with ID 23.2 mm, SDR 6 wall 5.4 mm. View in table
- 40 mm PP-R pipe: SDR 11 wall 3.7 mm, SDR 7.4 wall 5.5 mm with ID 29 mm, SDR 6 wall 6.7 mm. View in table
- 50 mm PP-R pipe: SDR 11 wall 4.6 mm, SDR 7.4 wall 6.9 mm with ID 36.2 mm, SDR 6 wall 8.3 mm. View in table
- 63 mm PP-R pipe: SDR 11 wall 5.8 mm, SDR 7.4 wall 8.6 mm with ID 45.8 mm, SDR 6 wall 10.5 mm. View in table
- 75 mm PP-R pipe: SDR 11 wall 6.8 mm, SDR 7.4 wall 10.3 mm with ID 54.4 mm, SDR 6 wall 12.5 mm. View in table
- 110 mm PP-R pipe: SDR 11 wall 10 mm, SDR 7.4 wall 15.1 mm with ID 79.8 mm, SDR 6 wall 18.3 mm. View in table
Conditions and notes
Wall thicknesses follow the ISO 4065 relation and rounding rule and were compared cell by cell with manufacturer charts. Inside diameter dᵢ = dₙ − 2eₙ is a nominal value. The PN match is the label sources give for water at 20 °C over 50 years.
- eₙ = dₙ / (2S + 1), where S is the theoretical series value, for example 3.1623 for S 3.2. A plain dₙ / SDR division therefore gives a different result in some cells: 3.5 rather than 3.4 mm for 25 mm SDR 7.4, and 4.1 rather than 4.0 mm for 20 mm SDR 5.
- PN labels differ between sources. Some manufacturers use another safety factor and label SDR 7.4 as PN 20 and SDR 6 as PN 25. Read the pressure class together with the SDR and from the manufacturer's table.
- Fibre reinforced or aluminium multilayer pipes may share the same outside diameter and SDR but carry a different PN label. Use the product's own table for selection.
- The 16 mm SDR 11 cell is blank because one source applies a 1.8 mm minimum wall. The 140 mm row is not shown because only one source lists it.
- Inside diameter is calculated from nominal values. The actual bore can be slightly smaller because of the wall tolerance.
- CSV download is unavailable because the sources do not establish permission for reuse.
Wall thickness and inside diameter of PP-R pipes for hot and cold water by nominal outside diameter and SDR series. Most sources label SDR 11 as PN 10, SDR 7.4 as PN 16, SDR 6 as PN 20 and SDR 5 as PN 25.
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. Version accessed. Accessed: 2026-10-16
- Source 3. Version accessed. Accessed: 2026-10-16
- Source 4. Version accessed. 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
- Source 7. Undated numerical table. The referenced edition is stated in the conditions.. Accessed: 2026-10-16
- Source 8. Undated numerical table. The referenced edition is stated in the conditions.. Accessed: 2026-10-16
Data version: 2026-10-16