Regarding the issue of grounding large tanks

Thank you, are there any relevant standards?

That’s how our company does it: before constructing the foundation for the tank, galvanized flat steel is welded onto the rebar cage of the foundation; these flat pieces of steel are then extended outward, and after the foundation is poured, they are connected to the bottom of the tank. Another method involves using galvanized round steel to create ground piles, which are then connected using static grounding wires

Ahah, this approach used by this sea friend is definitely not appropriate (there’s probably no standard for such a grounding method). A temporary solution might be acceptable, but it’s necessary to make the corrections in accordance with the standards as soon as possible! The grounding connection of the oil tank is corroded and broken; the problem must be resolved at its root! Strengthening anti-corrosion measures or replacing the existing grounding electrode is necessary to maintain long-term grounding integrity! Due to the grounding of the oil storage tank, it serves two functions: one is static electricity grounding, and the other is lightning protection grounding. If galvanized grounding flat bars are used to be welded to the grounding electrodes of adjacent tanks, they must be welded to the main grounding electrode of the storage tank (the part of the grounding electrode that extends underground), to ensure that a series connection of groundings is not created. Additionally, since it also serves the function of lightning protection grounding, the newly added grounding strips must be buried deep underground to prevent lightning from posing a threat to human safety!

Since it is an oil storage tank and there is oil inside, welding cannot be done at the bottom of the tank; could using appropriate yellow-green cable bolts for connection be considered?

Ahah, the suggestion from this user on the 7th floor is also feasible, but it is necessary to provide proper protection for the yellow and green grounding wires (the cross-sectional area must be at least 16 mm2, and protective sleeves must be used) to prevent damage to these wires due to external forces, while still ensuring that normal operations and equipment maintenance can proceed without any issues.

Static grounding is required, and the resistance value must be measured. It is also acceptable if the resistance value meets the specifications.

It should not be connected to the adjacent large tank. Is this considered two large tanks connected in series? GB 50169-2016 \"Code for Construction and Acceptance of Grounding Installations in Electrical Equipment Installation Projects\" 4.2.9 The grounding of electrical equipment must be connected separately to the grounding busbar or grounding grid; it is strictly prohibited to connect two or more electrical devices that require grounding in series through a single grounding wire. Explanation of the provisions: If grounding wires are connected in series, then when one of these wires breaks, the devices connected after it will lose their grounding. To prevent potential threats to human life, it is stipulated that \"it is strictly prohibited to connect two or more electrical devices that require grounding in series using a single grounding wire.\" This provision is a mandatory clause and must be strictly enforced.