Anti-corrosion for underground pipes
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How to control the corrosion protection of buried steel pipes? What is the focus?
It is sufficient to use non-metallic pipes or composite pipes directly; there is no need to worry about corrosion protection!
There are two key points for the anti-corrosion of steel pipes: the rust on the pipe surface must be removed thoroughly, and the surface should have an appropriate level of roughness. The anti-corrosion coating on the pipes must be secure, as verified through spark tests. There are many methods for anti-corrosion of underground pipes available online; you can take a look at them
From a testing perspective, the cathode peeling test is very important
For anti-corrosion of underground pipes, sandblasting for rust removal to SA2.5 grade is generally used, along with 6 layers of epoxy coal tar pitch cloth, or 1 MM thick polypropylene adhesive tape.
I know that; there are relevant regulations, and the design documents also specify it. What I mean is, how to ensure control during construction