Solvent-free epoxy coatings with low viscosity curing agent, cured coating has outstanding anti-corrosion function, hardness resistance and denseness. And there is a relatively suitable use period and curing time. In addition to the insulating property and excellent chemical stability of solvent-free epoxy coating, the coating has made great progress in adhesion, resistance, impact strength and peel strength. No solvent evaporation in the construction, once the film degree can reach more than 200 entanglement, no pinhole disadvantages. Save energy and protect the environment.
Cold-wrapped tape and E heat-shrinkable tape is characterized by the application of a variety of materials subject anti-corrosion spiral steel pipe, while other methods are applicable to the same or close to the material of the main anti-corrosion layer of the pipe. Domestic use of more steel pipeline anti-corrosion layer of petroleum asphalt, PE jacket and PE foam jacket, epoxy coal asphalt, coal tar enamel, epoxy powder and three-layer composite structure, etc., and now promote the use of a wide range of two pipeline anti-corrosion methods for three-layer PE composite structure and single-layer powder epoxy.
3PE cold-wrap anti-corrosion spiral steel pipe, 3PE cold-wrap anti-corrosion elbow, 3PE anti-corrosion pipe fittings. Cold-wrap anti-corrosion, simple operation, but slightly poor adhesion, low waterproof function, low strength, subject to environmental impact. Epoxy powder anti-corrosion, the choice of electrostatic spraying method, and the same material anti-corrosion pipe body fusion good, strong adhesion, but the epoxy powder waterproof poor (high water absorption rate, reaching 0.83%), to the pole protection planning brings certain difficulties. The site appliance requirements are high, the operation is difficult, and the quality is not easy to control.