What type of coating must be applied to galvanized steel piping installed under a concrete floor slab?

When galvanized steel piping is installed under a concrete floor slab, it is essential to apply a protective coating to prevent corrosion, especially in an environment that may be damp or have moisture. A machine-applied coating is often required in these situations because it provides a uniform layer of protection that adheres well to the surface of the steel, ensuring complete coverage and reducing the risk of corrosion over time.

The reason for using a machine-applied coating is that it is typically more consistent than manually applied options, ensuring that no areas are missed and that the coating adheres properly to all surfaces. This is particularly important in applications where the pipes are difficult to inspect or maintain due to their location under concrete.

However, other forms of coatings, such as paint coatings or manually applied coatings, may not provide the same level of durability or effectiveness compared to machine-applied coatings, especially under harsh conditions found in underground environments. Therefore, utilizing a machine-applied coating ensures that the galvanized steel piping achieves the necessary protection to maintain its integrity in the long term.