What is the maximum pressure for a threaded fitting size of 3"?

The maximum pressure for a threaded fitting size of 3 inches is 400 psi due to the material specifications and design limitations associated with this size and type of fitting. In the context of piping systems, the pressure rating of fittings depends on factors such as the type of material from which the fitting is made (e.g., steel, plastic), the manufacturing process, and the intended application. A 3-inch threaded fitting, especially when made of steel or another high-strength material, can typically handle up to 400 psi effectively while maintaining structural integrity and safety under normal operating conditions.

In high-pressure piping systems, it is crucial to adhere to pressure ratings to prevent leaks, failures, or catastrophic failures that could result from over-pressurization. When selecting fittings for high-pressure applications, engineers consider industry standards and codes, ensuring that the chosen fittings are suitable for the pressures they will encounter in service. This understanding reinforces the need for precision in identifying and adhering to the maximum allowable pressure for threaded fittings, making 400 psi the correct choice for a 3-inch fitting.