HDPE SDR Pressure Rating Calculator
Working pressure of HDPE pipe from its SDR and material grade (PE80/PE100).
PE100 SDR11 = PN16; SDR17 = PN10 (water, C=1.25). Derate ~50% at 40 °C and for fatigue-heavy surge duty.
Formula
HDPE SDR Pressure Rating Calculator is a free sdr pressure rating for pump engineers, plumbers and plant designers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About HDPE SDR Pressure Rating Calculator
Working pressure of HDPE pipe from its SDR and material grade (PE80/PE100). The calculation implements PN(bar) = 20·MRS / (C·(SDR − 1)) (ISO 4427 — PE pipes for water supply). PE100 SDR11 = PN16; SDR17 = PN10 (water, C=1.25). Derate ~50% at 40 °C and for fatigue-heavy surge duty.
How to use HDPE SDR Pressure Rating Calculator
- 1Enter SDR (OD/wall) (Common: SDR 11, 13.6, 17, 21, 26).
- 2Enter Material MRS in MPa (PE100 = 10 · PE80 = 8).
- 3Enter Design factor C (Water 1.25 · gas 2.0).
- 4Read Pressure rating instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use HDPE SDR Pressure Rating Calculator?
- ✓Implements the standard formula — PN(bar) = 20·MRS / (C·(SDR − 1))
- ✓Reference cited on-page: ISO 4427 — PE pipes for water supply
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the HDPE SDR Pressure Rating Calculator use?+
It computes PN(bar) = 20·MRS / (C·(SDR − 1)), per ISO 4427 — PE pipes for water supply. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
PE100 SDR11 = PN16; SDR17 = PN10 (water, C=1.25). Derate ~50% at 40 °C and for fatigue-heavy surge duty.
Can I use this for pump selection?+
Use it to establish the duty (flow, head, NPSH, power) and then pick a pump whose curve passes through that point near best efficiency. The tool gives you the engineering numbers a supplier will ask for.
Is the HDPE SDR Pressure Rating Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
Related Engineering tools
Reynolds Number Calculator
Compute Re from density, velocity, pipe diameter and viscosity — with instant laminar/turbulent classification.
● LiveLaminar vs Turbulent Flow Classifier
Classify hydraulic-oil or process-fluid flow regime from kinematic viscosity, line velocity and tube bore.
● LiveBernoulli Equation Solver
Solve downstream pressure between two points from velocities, elevations and fluid density (ideal, lossless).
● Live