Barlow's Formula β P = 2St / OD
Burst Pressure
β
psi
D/t Ratio
β
dimensionless
Hoop Stress (at P)
β
psi
Formula uses S = allowable stress (material yield Γ· safety factor). API 5L / ASME B31.3 use modified Barlow with mill tolerance derating.
Design Pressure Check
Required Wall Thickness
β
in
Design Status
β
check
Pipe Schedule Reference (ASME B36.10)
| NPS | OD (in) | Schedule | Wall t (in) | ID (in) | Weight (lb/ft) |
|---|
Flow Velocity & Reynolds Number
Flow Area
β
inΒ²
Velocity
β
ft/s
Reynolds Number
β
regime