Rust removal of air tank
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The client requires that the surface of the gas storage tank be sandblasted to remove rust; the outer surface is treated to facilitate painting for corrosion protection. Is it necessary to do the same for the inner surface?
It is necessary; otherwise, rust will clog the valves and instruments.
It’s not easy to carry out sandblasting for rust removal internally.
The outer surface is generally stricter. It dares to use carbon steel, indicating that corrosion is not severe and the requirements are not very high. But it also needs to be seated for rust removal.
An anti-rust coating is generally not required on the inner surface, but it cannot be ruled out either.
It depends on whether high cleanliness requirements are imposed on the gas inside the tank; for example, instrument air storage tanks generally require rust removal from their inner surfaces.
This depends on the design requirements; the coating requirements for the inner surface of the container should be specified separately
Unless otherwise specified in the design drawings, only the outer surface is to be processed.
It is not specified in the design drawings or technical agreements; by default, only the outer surface treatment is to be carried out. If internal surface treatment is required, it is generally specified separately in the design drawings or technical specifications.
The owner needs to carry out maintenance; it’s not easy to do so. If time permits, it can be done, but a full-scale scaffolding structure will be required, which incurs high costs