16. Welding and flame cuttin

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16. WELDING AND FLAME CUTTING 16. Welding and flame cutting Gases Colors of the gas cylinders: Oxygen Acetylene Nitrogen Carbon dioxide Argon Helium (white) (reddish brown) (black) (grey) (dark green) (brown) Colors of the gas hoses: Acetylene Oxygen Inert gas Liquid gas (red) (blue) (black) (orange) The gas hoses must meet the requirements of the European standard EN 559. Serious accidents and hazardous conditions may occur during welding or flame cutting if proper precautions are not taken and safety measures are not followed. Do not mix up hoses with clean air with shielding gas hoses. Good maintenance and careful handling of gas equipment are necessary for accident free operations. The gas hoses should be inspected every year. Damage is caused by: Ignorance and carelessness when handling or using equipment Insufficient knowledge of the properties of gases Poor condition of the equipment due to e.g. lack of regular maintenance Cross-connection of inert gases and breathing air 73


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