The lightning protection grounding requirements of gas stations are relatively high, and the lightning protection grounding construction requirements are relatively strict. Therefore, when choosing exothermic solder powder and electrolytic ion grounding electrodes for lightning protection grounding at gas stations, you must choose high-quality grounding brand consumables.
Because gasoline is volatile in places like gas stations, a little static electricity may cause serious consequences. Therefore, it is forbidden to make phone calls in such places. Gas stations must also conduct comprehensive lightning protection and grounding, and lightning protection and grounding in such places are required.
There are strict construction specification requirements.
Specific lightning protection grounding needs to do the following: 1. The oil tank should be lightning protected and grounded, and there should be no less than two grounding points.
2. When the gas station’s lightning protection, anti-static grounding, working grounding, protective grounding of electrical equipment and information system grounding are used, the grounding resistance shall not be greater than 4ω.
3. When the lightning protection and anti-static grounding of the gas station, the working grounding of the electrical equipment, the protective grounding and the grounding of the information system are each equipped with separate grounding devices, the grounding resistance of the lightning protection grounding device of the oil tank and the metal sheath of the wiring cable
The grounding resistance of the grounding devices at both ends and at both ends of the protective steel pipe is not greater than 10ω; the protective grounding resistance is not greater than 4ω; the grounding resistance of the grounding devices at the beginning, end and branch of the above-ground oil pipeline is not greater than 30ω.
4. The underground oil tank and the process pipeline exposed above the ground are electrically connected to each other and grounded.
5. When buildings such as station buildings and canopies in gas stations need to be protected against direct lightning strikes, lightning protection belts (nets) should be used for protection.
6. The information system of the gas station uses armored cables or wires passing through steel pipes for wiring.
Both ends of the metal sheath of the distribution cable and both ends of the protective steel pipe are grounded.
7. When the beginning and end of the distribution line of the gas station information system are connected to electronic devices, overvoltage (surge) protectors suitable for the withstand voltage level of the electronic devices should be installed.
8. Both ends of the cable metal sheath or cable metal protection tube of the power supply system should be grounded, and an overvoltage (surge) protector suitable for the equipment's voltage resistance level should be installed at the power end of the power supply and distribution system.
9. The beginning, end and branches of oil pipelines laid on the ground or in trenches should be equipped with combined grounding devices to prevent static electricity and prevent induction lightning. The grounding resistance should not be greater than 30ω.
10. The gasoline tank truck unloading site at the gas station shall be equipped with an anti-static grounding device for use when tank trucks are unloaded.
11. Use metal wires to bridge the flanges and hose ends of oil pipelines in explosion hazard areas.
When there are no less than 5 connecting bolts of the flange, bridging is not required in a non-corrosive environment.
12. The ground resistance of the anti-static grounding device is not greater than 100ω.
13. The lightning protection and anti-static device has passed the test and is within the validity period of the test.