Hydrotest Pressure Calculator for 8" Schedule 80 Carbon Steel Pipe
Formula
P_T = 1.5 × P × (S_T / S)
Governing Standard
ASME B31.3, Section 345.4.2
Required Inputs
- Design pressure P (psi)
- Allowable stress at design temp S (psi)
- Allowable stress at test temp S_T (psi)
Output
Minimum required hydrostatic test pressure P_T (psi)
Notes
For 8" Sch 80 carbon steel pipe, the stress ratio S_T/S is typically 1.0 when testing at ambient temperature. The test pressure must not exceed the yield strength of the material at test temperature.
Try the Interactive Calculator
Run the full calculation with your own inputs — free, no login required.
Open Calculator