Since medical gas systems directly affect the health of patients, the materials and equipment used in the system should be carefully selected and projects should be implemented by experienced personnel of companies whose business is only medical gas systems. Medical gases are Medical Oxygen-Medical Vacuum-Medical Air-Medical Nitrogenprotoxide-Medical Carbon Dioxide-Medical Pure Nitrogen gases. The medical phrases of these gases distinguish them from the gases used in industry. It is produced in standards specific to the class of gases containing medical inscriptions. Medical copper pipes should be used in the installations of all these medical gases transmitted from the plants to the user-patient.