This is the full wall-thickness table from ISO 4427-2, the standard that most metric HDPE water pipe is made to. Rows are nominal outside diameters; columns are SDR series with the PE100 pressure class each one gives at 20 °C. Every figure was transcribed from the standard and cross-checked against a second published table — none of it is calculated from DN ÷ SDR, because the standard's own rounding does not follow that formula exactly, and a table that disagrees with the one in your buyer's hands is worse than no table.
The calculator below turns any size-and-SDR pair into wall thickness, inside diameter and an estimated mass per metre. Use the mass for freight, container loading and lifting plans. Do not use it as a contract weight: production wall sits between the minimum and maximum, and what you pay for is defined by the specification and the weighbridge, not by an average.
If your project is written to ASTM or AWWA rather than ISO, the same ratio is called DR and the outside diameters are IPS or DIPS inches, which do not coincide with metric sizes — a 4 in IPS pipe is 114.3 mm, not 110 mm. The standards pages linked at the bottom explain the differences.
Key features
- 34 nominal sizes from DN16 to DN2000, nine SDR series from SDR 41 to SDR 7.4
- Minimum wall thickness exactly as printed in ISO 4427-2:2007 Table 2
- PE100 pressure class per column, based on the design coefficient C = 1.25
- Calculator gives wall range, inside diameter and estimated kg per metre
- Small sizes show the 2.0 / 2.3 / 3.0 mm minimums the standard applies for jointing
Specifications
| Source | ISO 4427-2:2007, Table 2 (wall thicknesses) |
|---|---|
| Size range | DN16 to DN2000 nominal outside diameter |
| SDR series | 41, 33, 26, 21, 17, 13.6, 11, 9, 7.4 |
| Pressure basis | PN at 20 °C, C = 1.25, PE100 (MRS 10 MPa) |
| Wall tolerance | ISO 11922-1 grade V: (0.1 emin + 0.1) mm rounded up |
| Density for mass | 0.955 g/cm³ (PE100 compound) |
Minimum wall thickness by nominal size and SDR
| DN (mm) | SDR 41 · PN 4 | SDR 33 · PN 5 | SDR 26 · PN 6 | SDR 21 · PN 8 | SDR 17 · PN 10 | SDR 13.6 · PN 12.5 | SDR 11 · PN 16 | SDR 9 · PN 20 | SDR 7.4 · PN 25 |
|---|---|---|---|---|---|---|---|---|---|
| 16 | — | — | — | — | — | — | — | 2.0 | 2.3 |
| 20 | — | — | — | — | — | — | 2.0 | 2.3 | 3.0 |
| 25 | — | — | — | — | — | 2.0 | 2.3 | 3.0 | 3.5 |
| 32 | — | — | — | — | 2.0 | 2.4 | 3.0 | 3.6 | 4.4 |
| 40 | — | — | — | 2.0 | 2.4 | 3.0 | 3.7 | 4.5 | 5.5 |
| 50 | — | — | 2.0 | 2.4 | 3.0 | 3.7 | 4.6 | 5.6 | 6.9 |
| 63 | — | — | 2.5 | 3.0 | 3.8 | 4.7 | 5.8 | 7.1 | 8.6 |
| 75 | — | — | 2.9 | 3.6 | 4.5 | 5.6 | 6.8 | 8.4 | 10.3 |
| 90 | — | — | 3.5 | 4.3 | 5.4 | 6.7 | 8.2 | 10.1 | 12.3 |
| 110 | — | — | 4.2 | 5.3 | 6.6 | 8.1 | 10.0 | 12.3 | 15.1 |
| 125 | — | — | 4.8 | 6.0 | 7.4 | 9.2 | 11.4 | 14.0 | 17.1 |
| 140 | — | — | 5.4 | 6.7 | 8.3 | 10.3 | 12.7 | 15.7 | 19.2 |
| 160 | — | — | 6.2 | 7.7 | 9.5 | 11.8 | 14.6 | 17.9 | 21.9 |
| 180 | — | — | 6.9 | 8.6 | 10.7 | 13.3 | 16.4 | 20.1 | 24.6 |
| 200 | — | — | 7.7 | 9.6 | 11.9 | 14.7 | 18.2 | 22.4 | 27.4 |
| 225 | — | — | 8.6 | 10.8 | 13.4 | 16.6 | 20.5 | 25.2 | 30.8 |
| 250 | — | — | 9.6 | 11.9 | 14.8 | 18.4 | 22.7 | 27.9 | 34.2 |
| 280 | — | — | 10.7 | 13.4 | 16.6 | 20.6 | 25.4 | 31.3 | 38.3 |
| 315 | 7.7 | 9.7 | 12.1 | 15.0 | 18.7 | 23.2 | 28.6 | 35.2 | 43.1 |
| 355 | 8.7 | 10.9 | 13.6 | 16.9 | 21.1 | 26.1 | 32.2 | 39.7 | 48.5 |
| 400 | 9.8 | 12.3 | 15.3 | 19.1 | 23.7 | 29.4 | 36.3 | 44.7 | 54.7 |
| 450 | 11.0 | 13.8 | 17.2 | 21.5 | 26.7 | 33.1 | 40.9 | 50.3 | 61.5 |
| 500 | 12.3 | 15.3 | 19.1 | 23.9 | 29.7 | 36.8 | 45.4 | 55.8 | — |
| 560 | 13.7 | 17.2 | 21.4 | 26.7 | 33.2 | 41.2 | 50.8 | 62.5 | — |
| 630 | 15.4 | 19.3 | 24.1 | 30.0 | 37.4 | 46.3 | 57.2 | 70.3 | — |
| 710 | 17.4 | 21.8 | 27.2 | 33.9 | 42.1 | 52.2 | 64.5 | 79.3 | — |
| 800 | 19.6 | 24.5 | 30.6 | 38.1 | 47.4 | 58.8 | 72.6 | 89.3 | — |
| 900 | 22.0 | 27.6 | 34.4 | 42.9 | 53.3 | 66.2 | 81.7 | — | — |
| 1000 | 24.5 | 30.6 | 38.2 | 47.7 | 59.3 | 72.5 | 90.2 | — | — |
| 1200 | 29.4 | 36.7 | 45.9 | 57.2 | 67.9 | 88.2 | — | — | — |
| 1400 | 34.3 | 42.9 | 53.5 | 66.7 | 82.4 | 102.9 | — | — | — |
| 1600 | 39.2 | 49.0 | 61.2 | 76.2 | 94.1 | 117.6 | — | — | — |
| 1800 | 43.8 | 54.5 | 69.1 | 85.7 | 105.9 | — | — | — | — |
| 2000 | 48.8 | 60.6 | 76.9 | 95.2 | 117.6 | — | — | — | — |
Maximum wall is emin plus the grade V tolerance. Sizes marked 2.0, 2.3 or 3.0 mm at the small end are rounded up by the standard rather than calculated; 3.0 mm is the practical minimum for electrofusion.
Wall thickness & weight calculator
Pick a nominal size and SDR. Wall thickness comes straight from ISO 4427-2 Table 2; mass is estimated from the mean wall and a PE100 density of {density} g/cm³.
- Wall thickness (min – max)
- 6.6 – 7.4 mm
- Inside diameter
- ≈ 96 mm
- Mass per metre
- ≈ 2.16 kg/m
- PE100 rating
- PN 10
Mass is an estimate for freight and lifting only — production wall sits between the minimum and maximum, usually nearer the minimum. Contract weights are per specification and weighbridge. Density 0.96 g/cm³.