Lightning rod manufacturing and installation for lightning protection and lightning protection products
1. All metal parts must be galvanized, and the galvanized layer should be protected during operation.
2. The tip of the needle is made of galvanized steel pipe. The thickness of the pipe wall shall not be less than 3mm, and the length of the tip brush shall not be less than 70mm.
3. The lightning rod should be installed vertically. The verticality tolerance is 3/1000.
4. Welding requirements Welding shall be carried out by lap welding, and the lap length must meet the following requirements:
5. Flat steel is twice its width (and at least 3 edges welded).
6. Round steel is 6 times its diameter.
7. When the round steel is connected with the flat steel, its length is 6 times the diameter of the round steel.
8. Lightning rods are generally made of round steel or steel, and their diameter should not be less than the following values:
A independent lightning rod is generally galvanized round steel with a diameter of 19mm.
b The lightning rod on the roof is made of 25mm diameter galvanized steel pipe.
The top lightning rod of c water tower adopts galvanized steel pipe with diameter of 25mm or 40mm.
d The top of the chimney is made of 25mm galvanized round steel or 40mm galvanized steel pipe. The lightning protection ring is made of 12mm galvanized round steel or 100mm2 galvanized flat steel. The thickness should be 4mm.
9
The lightning rod should be made of round steel or welded steel pipe, and its diameter should not be less than the following values:
Needle length less than 1m: round steel is 12mm
Steel pipe is 20 mm
Needle length 1-2m: round steel is 16mm
Steel pipe is 25mm
Needle on top of the chimney: 20 mm round steel
Steel pipe is 40 mm
Edit the quality of the lightning rod production and installation notes
The welding is not full, the flux treatment is not clean, and the anti-rust paint is leaked. The welding should be repaired in time, the peel should be knocked off, and the anti-rust paint should be applied.
The needle is bent and the verticality of the installation exceeds the allowable deviation. The needle should be re-aligned and installed after meeting the requirements.
The independent lightning rod and its grounding device are not in conformity with the protection distance of the entrance or exit of the road or building. The distance should be greater than 3m. When less than 3m, pressure equalization measures should be taken or pebble or asphalt should be laid.
note:
If the lightning rod is not grounded, it will be a lightning rod, so care must be taken.
supplement:
The role of the lightning rod is not as good as most people think. There are many factors in whether a building is struck by lightning. Whether or not a lightning rod is only one of them.
Many ancient buildings are built on the top of the mountain without lightning strikes. Instead, it is easy to strike in the nearby valleys because of the different soil resistivity. There are many sandstones on the mountain, and the soil resistivity is large; there are many rivers in the valley, the soil has large water and the soil resistivity is small.
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