What is the maximum water temperature used for hydrostatic testing?

The maximum water temperature used for hydrostatic testing is established to ensure safety and integrity during the testing process. Hydrostatic testing involves filling a system with water to check for leaks and verify its strength under pressure. Maintaining the water temperature at or below 120°F is crucial because higher temperatures can affect the properties of both the water and the materials being tested, particularly in terms of stress, fatigue, and potential material expansion.

Using water that is too hot can also lead to inaccuracies in pressure readings and may pose hazards such as burns or steam formation if leaks occur. Therefore, 120°F is a critical threshold that balances effective testing conditions with safety standards, making it the correct answer for maximum water temperature in hydrostatic testing.