What is the maximum allowable pressure for threaded fittings for a 1/2" diameter?

The maximum allowable pressure for threaded fittings of a 1/2" diameter is identified as 1500 psi, making it the correct answer. This value is established based on industry standards and practices that dictate the performance limits of these fittings under high-pressure conditions.

Threaded fittings are designed to create a secure and leak-resistant connection, allowing them to handle substantial pressure levels in piping systems. The 1500 psi rating aligns with typical specifications found in relevant codes and standards such as those set by the American Society of Mechanical Engineers (ASME) and the American National Standards Institute (ANSI).

Understanding the appropriate pressure ratings is crucial for ensuring safety and operational efficiency in high-pressure piping systems. Therefore, when selecting fittings, it's essential to consult the appropriate references to ensure that the maximum allowable pressures are not exceeded, thus preventing potential failures or hazards in a piping system.