Are there any new regulations regarding lightning protection facilities? Why isn’t our new device equipped with a lightning rod?

The absence of a lightning rod most likely means that all the equipment is connected to ground via static electricity. Is your installation based on a frame structure? If so, it’s likely that the frame itself is already grounded, so there’s no need for a lightning rod

The second floor is the correct answer... We do the same!

I remember that for tanks with a thickness of more than 4 mm, it is not necessary to install separate lightning arresters or downconductors; however, the various components of the tank must be kept in good electrical contact, and the tank itself must be grounded. I forgot the source. . . I would like to ask experts to help resolve my doubts

First, it is necessary to determine its lightning protection category; for category 1 lightning protection, a lightning rod is definitely required. Your device falls under Category II lightning protection, so of course there is no need for a lightning rod. However, grounding is necessary. If there is a vent pipe, then a lightning rod will probably be necessary.

Refer to Chapter 8 \"Electrical\" of the \"Code for Fire Protection Design of Petrochemical Enterprises\" GB 50160—92, Section 2 \"Lightning Protection\": Article 8.2.1 The classification of lightning protection and the corresponding measures for buildings and structures within process units shall be carried out in accordance with the relevant provisions of the current **standard \"Code for Lightning Protection Design of Buildings\". Article 8.2.2 For towers, containers, etc. installed outdoors within process units, if the thickness of their top plates is 4 mm or greater, they do not require lightning rods for protection; however, lightning protection grounding must be provided. Article 8.2.3 Steel tanks for flammable gases, liquefied hydrocarbons, and flammable liquids must be equipped with lightning protection grounding and shall comply with the following provisions: 1. The protection area of lightning rods and wires shall cover the entire storage tank ； II. For above-ground fixed-roof tanks holding Class A B and Class C flammable liquids equipped with flame arresters, lightning rods or wires may not be required when the thickness of the roof panel is 4 mm or greater ； When the thickness of the roof slab is less than 4 mm, lightning rods or wires should be installed ； III. For Class C liquid storage tanks, lightning rods or wires are not required, but protection against induced lightning via grounding is necessary ； IV. Floating roof tanks (including internal floating roof tanks) do not require lightning rods or wires; however, the floating roof must be electrically connected to the tank body using two soft copper wires with a cross-sectional area of not less than 25 mm2 ； V. Pressure storage tanks shall not be equipped with lightning rods or wires, but must be grounded. Article 8.2.4 For the measuring devices for temperature, liquid level, etc., of flammable liquid storage tanks, armored cables or steel pipes shall be used for wiring, and the cable insulation or the wiring steel pipe shall be electrically connected to the tank body. Article 8.2.5 The resistance requirements for lightning protection grounding systems shall be met in accordance with the relevant provisions of the current **standards, namely the ‘Design Code for Oil Depots’ and the ‘Design Code for Lightning Protection of Buildings’.

This post was last edited by Happy Tease on 2010-12-17 01:12. In fact, a lightning rod is not meant to ward off lightning but rather to guide it; chemical processing facilities are generally made of metal towers or metal tanks. As long as the thickness of the metal is sufficient to prevent it from being damaged by lightning strikes, and proper grounding is in place, such structures can serve as conductors for lightning strikes, thereby reducing the hazards caused by direct or induced lightning strikes. Lightning rods cannot be too tall, as their range of protection is limited. Large-scale chemical processing facilities usually need to rely on their own structural features to provide lightning protection; it is sufficient to stay at a distance of 3 meters away from tall metal structures during thunderstorms