Barlow's formula

Barlow's formula (called "Kesselformel"[1] in German) relates the internal pressure that a pipe[2] can withstand to its dimensions and the strength of its material.

The design of a complex pressure containment system involves much more than the application of Barlow's formula.

For example, in 100 countries the ASME BPVCcode stipulates the requirements for design and testing of pressure vessels.

[4] The formula is also common in the pipeline industry to verify that pipe used for gathering, transmission, and distribution lines can safely withstand operating pressures.

In the United States, this design factor is dependent on Class locations which are defined in DOT Part 192.