What is the maximum allowable pressure for tests that require gauge increments of 0.1 psi or less?

The maximum allowable pressure for tests that require gauge increments of 0.1 psi or less is 10 psi. This is based on the need for precision in measurement—such fine increments necessitate a limited pressure range in order to ensure that the measurements remain accurate and reliable during testing. At pressures higher than 10 psi, the resolution of 0.1 psi becomes less meaningful as the effects of temperature, potential for variations in the system, or additional external factors can introduce measurement errors. By setting the limit at 10 psi, the code ensures that testing can be performed with the necessary accuracy while maintaining safety and reliability standards.