What is the test used to measure the ability of a cylinder to withstand internal pressure?

The test used to measure the ability of a cylinder to withstand internal pressure is hydrostatic testing. This method involves filling the cylinder with a liquid, typically water, to a specified level and then pressurizing it to a level higher than its normal working pressure. The purpose of hydrostatic testing is to ensure the integrity of the cylinder and to identify any weaknesses or potential failures in the material that might compromise its safety during use.

Hydrostatic testing is essential in industries where cylinders are used to store and transport gases under high pressure, such as in fire protection systems, as it helps ensure that the cylinders can safely handle operational pressures. The procedure helps to detect leaks and deformations that could pose risks when the cylinder is in service.

Other testing methods mentioned, such as hydromatic testing, load testing, and capacity testing, serve different purposes and do not directly assess the ability of a cylinder to withstand internal pressure. Hydromatic testing is not a standard term related to pressure testing of cylinders, load testing pertains to evaluating the structural integrity of materials or equipment under weight, and capacity testing measures the volume a cylinder can hold rather than its pressure resilience.