What test consists of pressurizing a hose to twice its maximum pressure?

The hydrostatic test is specifically designed to assess the integrity of a hose or piping system by filling it with water and pressurizing it to twice its maximum working pressure. This method effectively identifies any weaknesses, leaks, or potential failure points because the water, being incompressible, exerts a significant force against the walls of the hose or pipe. As the pressure is increased, any defects would typically cause observable leaks, making this a reliable method for ensuring safety and compliance with engineering standards.

In contrast, other tests, such as leak tests or pneumatic tests, do not involve the same level of pressure increase or the use of water. Leak tests generally focus on detecting the presence of leaks at the normal operating pressure without the added stress of double pressure, while pneumatic tests use air or gas and present a different risk profile due to the compressibility of gases. A pressure test is a more general term and may not specifically denote the exact conditions of the hydrostatic test. Thus, the hydrostatic test stands out as the correct choice for this question.