Accurately calculate the pressure rating for smooth wall steel pipes. Our tool helps engineers and designers quickly determine working and burst pressures based on ASME B31.3, pipe diameter, wall thickness, and material strength. Ensure pipe safety and compliance with ease.
Formula:
The pressure rating for a smooth wall steel pipe is primarily calculated using an adaptation of Barlow's formula, incorporating factors from standards like ASME B31.3.
Design Working Pressure (P):
P = (2 × S × t × E) / (OD - 2 × y × t)
P= Design Internal Pressure (psi)S= Allowable Stress for Material at Design Temperature (psi)t= Nominal Wall Thickness (in)E= Weld Joint Efficiency Factor (unitless, e.g., 1.0 for seamless pipe)OD= Pipe Outside Diameter (in)y= Coefficient (unitless, typically 0.4 for steels below 900°F)
A simplified estimation for Burst Pressure (Pburst) is often given by:
Pburst ≈ (2 × UTS × t) / OD
UTS= Ultimate Tensile Strength of Material (psi)