What type of test should be conducted on a boiler after it has undergone maintenance or repair?

The hydrostatic test is the appropriate procedure to conduct on a boiler after maintenance or repair. This test involves filling the boiler with water and pressurizing it beyond its normal operating pressure to check for leaks and ensure the integrity of the boiler components. The test serves as a critical safety measure, as it allows for the detection of any weaknesses or potential failures that may have arisen during the maintenance or repair process.

By applying a pressure higher than the operational limits, any existing imperfections or issues can be identified before the boiler is put back into service. It is an essential method of ensuring that the boiler can safely operate at its designated pressure levels without risk of failure due to undetected leaks or structural weaknesses.

While other tests, such as leak tests and non-destructive tests, are important in certain contexts, the hydrostatic test specifically verifies the boiler’s resilience and safety after undergoing maintenance or significant repair work.