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Points for Attention in Design of Tank Grounding System in Gas Station: 1. Oil tanks should be lightning-proof grounding, and grounding points should not be less than two. 2. The buried oil tank should be electrically connected with the process pipeline exposed to the ground and it should be grounded. 3. The information system of gas station should be equipped with armoured cable or wire through steel pipe. Both ends of the metal skin of the distribution cable and the protective steel pipe should be grounded. 4. The joint grounding device of anti-static electricity and Anti-induction lightning should be installed at the beginning, end and branch of oil pipeline laid on the ground or pipe trench, and its grounding resistance should not be greater than 30 Ω. 5. Anti-static grounding device for unloading of petrol tanker should be installed in unloading site of petrol tanker station, and electrostatic grounding instrument should be installed to detect cross-connection and monitor the status of grounding device.