The standard "GB/T 7144-2016 Gas Cylinder Color Marking" specifies the requirements for the application of Color, lettering, lettering, color ring, color ribbon and inspection color mark on the outer surface of the gas cylinder. These marks are used to identify the type of gas filled in the gas cylinder and the period of regular inspection. The standard applies to repeability refillable gas cylinders that meet TSG RO006 and related gas cylinder standards, but not to non-repeability refillable gas cylinders, gas cylinders for fire suppression and bottle-type Pressure Vessels attached to machinery and equipment. This standard ensures the safe use and effective management of gas cylinders through a unified Color marking.