Questions regarding Article 9.2.2 of the Code for Fire Protection Design of Oil and Gas Engineering Projects! !
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\"Code for Fire Protection Design of Oil and Gas Engineering Projects\", clause 9.2.2 states that for towers, containers, etc. installed outdoors within process units, if the thickness of their roofs is 4 mm or greater, it is not necessary to install lightning rods for protection; however, a lightning protection grounding system must be in place. ” Are the towers and vessels mentioned in the standards solely metal vessels? Are fiberglass tanks included in this category?
This is also mentioned in Article 8.2.3 of the Code for Fire Protection Design of Petrochemical Enterprises. Is there also no clear specification regarding whether the containers and towers are metal? However, the forum does have the design specifications for fiberglass tanks mentioned by the original poster, which can be referenced at http://bbs.hcbbs.com/thread-306487-1-1.html
Glass fiber reinforced plastic doesn’t conduct electricity, right? . . . It probably won’t work
In fact, the aforementioned provisions are derived from the **Standard for Design of Lightning Protection for Buildings**. Article 4.1.4 states that for buildings with metal roofs, other than those classified as Category 1 lightning protection buildings, it is advisable to use their roofs as lightning receptors, and they must meet the following requirements: First, when metal sheets are overlapped, the overlap length should not be less than 100 mm. Second, if there are no flammable materials beneath the metal sheets, their thickness should not be less than 0.5 mm. Third, if there are flammable materials beneath the metal sheets, the thickness of iron sheets should not be less than 4 mm, that of copper sheets should not be less than 5 mm, and that of aluminum sheets should not be less than 7 mm
I’ve been in communication with the designers about this matter these past two days; I’ve learned something!
So what are the first category of lightning protection buildings?