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3PP anti-corrosion refers to the three-tier pipeline PP anti-corrosion structure: the first layer of epoxy powder (FBE), the second layer of adhesive (AD), the third layer of polyethylene (PP). Where 2PP does not contain the first layer.
Three materials into one, and firmly combined with the formation of a good anti-corrosion coating, coating temperature up to 110 degrees.
China has not yet developed 3PP coating industry standards, the processing of 3PP corrosion pipeline generally used in Germany DIN30678 "steel pipe polypropylene coating" standard. 3PP coating is mainly used to transport high temperature medium corrosion steel pipe and used as the surface temperature is higher, longer sunshine in the desert area of the pipeline coating, so the surface temperature is higher, according to a longer time buried water, Gas transmission, oil pipelines have been more and more widely used.
Minimum layer thickness can refer to the corresponding standard.
3PP anti-corrosion process is as follows:
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