What is the minimum temperature of water required for a hydrostatic test of a boiler?

The minimum temperature of water required for a hydrostatic test of a boiler is 20 degrees Celsius. This temperature is significant as it ensures the water is above typical freezing conditions, reducing the risk of water freezing in the system and causing damage during the test. Performing a hydrostatic test involves filling the boiler with water and pressurizing it to check for leaks and structural integrity. Testing at a temperature of 20 degrees Celsius also helps in preventing condensation inside the boiler, which can lead to inaccuracies in the test results and potential corrosion if water is allowed to stagnate. Therefore, utilizing water at this temperature provides a safer and more effective testing environment. It's worth noting that lower temperatures could compromise the testing process and the material properties of the boiler.