What are the required safety precautions when operating a nitrogen cart used for inflating aircraft tires on the ramp?

Operating a nitrogen cart for inflating aircraft tires on the ramp demands strict adherence to safety precautions due to the high pressure involved and the potential hazards associated with compressed gases. Firstly, ensure the operator is properly trained and certified in the safe operation of nitrogen carts. This training must include understanding the properties of nitrogen, the cart's operating procedures, and emergency shutdown protocols. Before use, inspect the nitrogen cart for any signs of damage, leaks, or corrosion. Pay close attention to the hoses, regulators, and pressure gauges. Verify that all connections are tight and secure. Wear appropriate personal protective equipment (PPE), including safety glasses or a face shield, and gloves. This protects against potential eye or skin injuries from leaks or equipment malfunctions. Position the nitrogen cart securely on a level surface and chock the wheels to prevent movement. Ensure the cart is a safe distance from any potential ignition sources, such as open flames or running engines. Before connecting the nitrogen hose to the aircraft tire valve, verify that the tire pressure gauge is properly calibrated and functioning correctly. Use a calibrated gauge designed for aircraft tires. Gradually increase the pressure in the tire, monitoring the pressure gauge closely. Do not exceed the maximum allowable tire pressure specified in the aircraft's maintenance manual. Over-inflation can cause the tire to explode. Maintain a safe distance from the tire while it is being inflated. If the tire shows any signs of bulging or damage, immediately stop the inflation process and evacuate the area. After inflating the tire, carefully disconnect the nitrogen hose and check the tire valve for leaks. Replace the valve cap to protect the valve from damage and contamination. Store the nitrogen cart in a secure and well-ventilated area when not in use. Ensure that the cart is protected from direct sunlight and extreme temperatures. Never tamper with or modify the nitrogen cart's safety devices, such as pressure relief valves. These devices are designed to prevent over-pressurization. In case of a nitrogen leak, evacuate the area immediately and notify emergency services. Nitrogen is an asphyxiant and can displace oxygen in enclosed spaces. Proper grounding of the nitrogen cart is essential to prevent static electricity buildup, especially in dry environments. Always follow the manufacturer's instructions for operating and maintaining the nitrogen cart.