Internal Pressure Capacity of a Pipe Calculator

Pipe internal pressure capacity calculator - formula & step by step calculation to find the capacity of pipe to safely withstand to internal operating pressure. P = (2 x S x t)/D is Barlow's equation generally used in the design of autoclaves & various pressure vessels. Allowable pressure P, allowable stress S in MPa, pipe wall thickness in m & outside diameter in m are the key terms of this calculation.

Barlows Formula for Pipe

The below mathematical representation of Barlow's formula is used to calculate internal pressure capacity of pipe line system in mechanical engineering. Besides, the step by step calculation for each calculation performed by using this calculator let the users to know how to perform coefficient of area thermal expansion calculation.


In the field of mechanical engineering, while working with the design of pipe lines to gather, transmit & distribute gas, oil etc, it's important to analyse the capacity of the pipe to prevent bursting due to internal pressures. The above Barlow's formula & step by step calculation may be useful for users to understand how the values are being used in the formula to find the capacity of pipe line that withstand the maximum internal pressure, however, when it comes to online for quick calculations, this Barlow's equation calculator helps the user to perform & verify such mechanical engineering calculations as quick as possible.