What method is used to assess the serviceability of an oxygen cylinder?

The assessment of an oxygen cylinder's serviceability through a pressure test with water is a critical method used to ensure that the cylinder can safely handle the pressure it is designed for. This hydrostatic testing involves filling the cylinder with water and then pressurizing it to levels beyond normal operating pressure. By observing the cylinder for leaks, bulges, or other deformations under pressure, technicians can determine its structural integrity and safety for continued use.

While visual inspection is a common practice to identify obvious signs of damage or wear, it cannot guarantee the cylinder's performance under pressure. Weight comparison can indicate if there has been a significant loss of gas, but it does not directly assess the cylinder's strength or ability to withstand high pressures. Heat tests are generally not standard for assessing oxygen cylinders and can potentially introduce risks associated with thermal expansion or other factors. Therefore, hydrostatic testing is crucial in confirming that the cylinder is safe for service.