Barlow`s Formula

barlows

Where:

      P = ID pressure (psi)
      T = Wall thickness (in)
      OD = Outside Diameter (in) *Must be a decimal*
      SF = Safety factor (generally 1.5 – 10, 1 for collapsing pressure)
      S = Material strength (psi) *Minimum yield strength*
OD (in)      (in)
Wall (in)      (in)
Strength Factor (minimum yield strength)         (psi)
Safety Factor (working)
Safety Factor (bursting) 1
 
Theoretical Working
Pressure (selected SF)		      (psi)
Theoretical Bursting or
Yeilding Pressure (SF=1)		      (psi)
*Disclaimer: Formulaic calculators are provided purely for illustrative purposes, and should not be relied upon for any technical, engineering, or application-specific purpose. For technical information, consult a licensed petroleum engineer.