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Pipeline insulation generally requires cleaning in the trench and pipe well, and anti-corrosion treatment can only be carried out after the insulation layer is no longer damaged by the next process. Generally, pipeline insulation can only be constructed after passing the hydrostatic test and completing the anti-corrosion process, and the process cannot be reversed. The anti-corrosion layer for pipeline insulation, which is of course a protective layer against soil corrosion, is mainly made of glass fiber wrapped with epoxy resin or specially reinforced epoxy coal tar anti-corrosion layer.

The internal testing of pipeline insulation may require some anti-corrosion treatment, and there are many anti-corrosion skills. A common method is to close the anti-corrosion treatment, that is, to perform full sealing treatment inside, so that there will be no gaps or leaks inside the pipeline. Another type of anti-corrosion treatment is to apply some special anti-corrosion materials.

There are two construction methods for pipeline insulation and polyurethane pipeline insulation: underground and direct burial. Generally speaking, they are buried directly. The construction method for insulation of FRP pipes underground is extrusion method. It is generally not recommended to use compression methods in cities.

High temperature prefabricated buried pipeline insulation not only has anti-corrosion treatment technology and practical performance that are difficult to compare with traditional trench and overhead laid pipelines, but also has significant social and economic benefits, and is also a powerful measure for heating energy conservation. The insulation of high-temperature prefabricated buried pipelines adopts the technology of directly buried heating pipelines. The overall insulation performance of buried pipelines is excellent, and strict implementation of shot blasting and rust removal treatment on the outer surface of steel pipes and corona treatment on the inner surface of outer protective pipes further improves the bonding performance of pipeline insulation.