Hydrostatic Test Pressure Calculator
Code test pressure for piping (1.5×) with the temperature-stress ratio correction.
Hold 10 minutes minimum, then inspect at design pressure. Vent the high points — trapped air makes a hydrotest a pneumatic bomb.
Formula
Hydrostatic Test Pressure Calculator is a free hydrotest pressure 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 Hydrostatic Test Pressure Calculator
Code test pressure for piping (1.5×) with the temperature-stress ratio correction. The calculation implements P_test = 1.5·P_design·(S_T/S_D) (ASME B31.3 ¶345.4.2) (ASME B31.3 ¶345 — leak testing). Hold 10 minutes minimum, then inspect at design pressure. Vent the high points — trapped air makes a hydrotest a pneumatic bomb.
How to use Hydrostatic Test Pressure Calculator
- 1Enter Design pressure in MPa.
- 2Enter Stress ratio S_test/S_design (1.0 unless design temp is high).
- 3Read Hydrotest pressure, Test pressure instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Hydrostatic Test Pressure Calculator?
- ✓Implements the standard formula — P_test = 1.5·P_design·(S_T/S_D) (ASME B31.3 ¶345.4.2)
- ✓Reference cited on-page: ASME B31.3 ¶345 — leak testing
- ✓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 Hydrostatic Test Pressure Calculator use?+
It computes P_test = 1.5·P_design·(S_T/S_D) (ASME B31.3 ¶345.4.2), per ASME B31.3 ¶345 — leak testing. 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?+
Hold 10 minutes minimum, then inspect at design pressure. Vent the high points — trapped air makes a hydrotest a pneumatic bomb.
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 Hydrostatic Test Pressure 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.
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