Describe the term "hydrostatic testing."

The term "hydrostatic testing" specifically refers to a testing method that uses water to check for leaks in pipes and piping systems. This process involves filling the pipe with water and then pressurizing it to a specified level. This allows inspectors to observe any pressure drops over a period of time, which would indicate a leak. It serves as a critical safety measure to ensure that pressure vessels and piping systems are structurally sound and capable of withstanding their intended service conditions without leaking.

This method is essential in many industries, particularly in the context of pressure piping, as it provides a reliable means of detecting weaknesses in the system that could lead to catastrophic failures if not addressed. The use of water, which is incompressible, allows for accurate measurement of pressure changes, making hydrostatic testing one of the preferred methods for evaluating the integrity of pressure piping systems prior to being put into operation. Other options, while related to piping, do not accurately describe hydrostatic testing.