During a hydrostatic test, safety valves are typically ____ or held by a ____?

During a hydrostatic test, safety valves are typically removed or held by an approved clamp to ensure they do not affect the accuracy of the test. The primary purpose of a hydrostatic test is to check for leaks and assess the integrity of the boiler under pressure. By removing the safety valves, it eliminates the risk of them opening due to the increased pressure from the test, which would provide false readings and compromise the safety of the procedure.

Using an approved clamp to secure the valves is also a common practice. This ensures that the valves remain safely in place and do not accidentally engage during the testing process. Maintaining a controlled environment during the hydrostatic test is crucial for accurate results and the overall safety of the equipment being tested.