Buried pipelines, whether for oil, gas or water transportation, generally require strong anti-corrosion performance on the outer wall of the pipeline. Because of different soil environments, especially in wet soil environments, the anti-corrosion performance of buried pipelines is better. Three-layer polyethylene is the most common anti-corrosion method for buried steel pipelines. Its excellent anti-corrosion performance, good burial performance and more than 30 years of service are the best anti-corrosion methods for buried pipelines. Xiamen Weiyuan Pipe Co., Ltd. specializes in consuming three-layer polyethylene anticorrosive steel pipe. The company has excellent technicians for anticorrosive steel pipe as technical guidance, advanced intermediate frequency heating consumption line and experienced abundant consumer operators. The company has been engaged in the anticorrosive industry of steel pipe and steel pipe for more than ten years, and has rich experience in supply and installation of various projects. It is the best companion for your cooperation.
Fused epoxy powder steel pipe is usually divided into two kinds, single layer and double layer. Aiming at the problem of weak mechanical impact resistance and poor waterproofness of single layer fused epoxy powder anticorrosive steel pipe, American anticorrosive company has studied a lot of information, structure and construction technology of anticorrosive coating, put forward technical ideas of modifying epoxy powder data, and set up double layer fused epoxy powder anticorrosive material. The concept of the system is to use standard single-layer fused epoxy powder as the base coating and modified fused epoxy powder as the outer protective layer.
In this way, the mechanical properties of the anticorrosive coatings can be significantly improved, and the high temperature permeability, high temperature resistance and impact resistance of the anticorrosive coatings are greatly enhanced. In addition, the compatibility between the single-layer fused epoxy powder anticorrosive coatings and cathode maintenance is preserved, which prevents the generation of cathode maintenance shielding. The overall anticorrosive layer thickness of the double-layer melted epoxy powder anticorrosive system is between 525 and 1000um, and the maximum operating temperature is 115 C. It can be applied to anticorrosive requirements of steel pipes, elbows, special-shaped parts and repairs with various diameters.
The coating technology and standard of the double-layer fused epoxy powder anticorrosive steel pipe system are basically the same. The layout of the powder spraying chamber and the Qiang spraying chamber has changed, and there is no need to add complicated equipment. There are two layouts of spraying chamber: double spraying chamber and whole spraying chamber. Both of them are used to coat the anti-corrosion system of double-layer melted epoxy powder.
Laboratory tests and field application experiments show that the comprehensive performance of the two-layer fused epoxy powder anticorrosive system applied in long distance pipelines is better than that of the single-layer epoxy powder anticorrosive coating, and it has the characteristics of longer effective service life, lower maintenance cost and multi-layer anticorrosive coating types. The types of the two-layer fused epoxy powder anticorrosive system can be selected according to different requirements. Pipeline construction can be adopted, especially when it needs to stop construction in crossing and mountainous areas. It can resist the corrosion of soil with strong chemical corrosiveness. It has a wide range of adaptability to temperature and applicable pipe diameter, and can be applied to all kinds of special-shaped parts. In site construction, there are comparatively mature repair construction and other techniques, which are easy to control quality, superior scratch resistance and even impact resistance. It is similar to the three-layer PE anticorrosive structure. The system has strong bonding performance and good water permeability resistance. It has been widely used in long-distance pipeline engineering.
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