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Acceptance test pressure for fire pipework
Enter the maximum working pressure (usually pump churn plus supply). Get test pressure, holding time and pass criteria.
Quick answer
Working pressure 10.0 bar: hydrostatic test at 13.8 bar (200 psi) for 2 hours with no leakage.
Preliminary results
Hydrostatic test13.8bar
Hold2h
Air test—
| Step | Result | Basis |
|---|---|---|
| Hydrostatic test pressuremax(13,8; 10.0 + 3,4) | 13.8 bar | NFPA 13 ⚠ |
| Pass criteria2 h | No leakage, no pressure loss | NFPA 13 |
Sources and assumptions. NFPA 13 (hydrostatic 200 psi or working + 50 psi, 2 hours; dry air test 40 psi, 24 hours). TCVN 7336:2021 has its own test rules; follow the approved design ⚠. ⚠ = code table value to be checked against the original standard. Preliminary results for material selection and budgeting; not a substitute for an approved fire protection design.
Frequently asked questions
What pressure is fire pipework tested at?
Per NFPA 13: at least 13.8 bar (200 psi) for 2 hours; above 10.3 bar (150 psi) working pressure, test at working pressure plus 3.4 bar (50 psi).
Where is test pressure measured?
At the lowest point of the section under test; higher points see less, about 0.1 bar per metre of elevation.