The standard range of zinc layer thickness of hot-dip galvanized steel grating varies depending on different countries, regions, specific application areas, and steel grating thickness. The following are some common standards:

International Standards: According to ISO 1461 of the International Organization for Standardization (ISO), the zinc layer thickness of hot-dip galvanized steel grating should be between 65μm and 85μm.

European Standards: The European EN ISO 1461 standard stipulates that the zinc layer thickness of hot-dip galvanized steel grating should be between 45μm and 85μm.

US Standards: The US ASTM A123/A123M standard requires that the zinc layer thickness of hot-dip galvanized steel grating should be between 3.9mil and 5.9mil, equivalent to about 100μm to 150μm.

Hot-dip galvanizing is a chemical treatment that melts zinc ingots at high temperatures, with good adhesion and high zinc content. The amount of zinc on the galvanized steel grating directly affects the service life of the steel grating.
1. When the thickness of the steel grating is between 1.5-3mm, the average zinc thickness on the hot-dip galvanized steel grating should be greater than 55μm, and the local thickness should be greater than 45μm.
2. When the thickness of the steel grating is between 3-6mm, the average zinc thickness on the hot-dip galvanized steel grating should be greater than 70μm, and the local thickness should be greater than 55μm.
3. When the thickness of the steel grating is equal to or greater than 6mm, the average zinc thickness on the hot-dip galvanized steel grating should be greater than 85μm, and the local thickness should be greater than 70μm.

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