Inner coating of the pipeline

The use of epoxy powder coating in foreign countries have 30 years of history, due to a wide range of sources of raw materials, production methods are simple, cheap, good performance, do not pollute the environment, long life, is a good anti-corrosion coating. Petroleum Institute of Building Technology Corrosion in the oil pipeline in China, the successful development of the epoxy powder to fill the domestic pipeline anti-corrosion coating anti-corrosion paint blank. The coating has excellent chemical resistance, good mechanical properties, high electrical insulation properties and good toughness. Corrosion test Predict the life of the coating, intact storage of paint, oil, gas, water pipes, life expectancy of up to 15 years; make sewage and mixed water pipe coating life of up to 5-7 years. The pipe industry's construction methods, the most widely used static thermal spraying method. According to the data, the coating requirements for epoxy powder coatings are also different due to the thickness of the media delivered. Domestic oil, gas, water, sewage and other corrosive medium containing corrosion pipe is the best thick coating. Electrostatic spraying thick coating, spray thickness up to 250 ~ 350 / a, the maximum thickness of up to 500, ~ (n) electrostatic powder moraine coating is a surface treatment of solid powder, it has the equipment is simple, easy to operate, The process is simple, not subject to the size of the workpiece and other advantages.


Inner surface of heat-resistant coatings and coatings
The technology is the surface heat-resistant coating mixed epoxy resin main agent, epoxy curing agent in the steel pipe (each about 5.5 million), natural drying period of time, more than 6o ℃ warm water or 60 ℃ or more hot air into the tube, Forced to dry, more than three hours to complete the steel pipe coating. The technology is mainly applied to the first surface treatment of the inner wall of the inner pipe of the water pipe, the water pipe and the hot water pipe, and then the pressure between the two applicators and the resistance is thermally coated in the pipe wall by using the pressure of air or nitrogen to form Even coating. Coatings must be 6o ° C above warm water or above 60 ° C, hot-air forced-drying and natural drying significantly reduce the thermal resistance to dissolution.


Epoxy resin latex mortar lining
Epoxy emulsion cement mortar lined with steel pipe inner surface coated with epoxy cement water-based paint to form a coating, and then based on this coating lining. The material used is epoxy latex cement mortar. Add colloidal silica to the cement mortar. Cement waterborne coatings and cement mortars contain ionic latexes (hydrocarbon solvents containing 5 to 8 sugars). In addition to the sewage pipe, the steel pipe lining is also suitable for oil, gas and steam pipelines. In order to obtain a solid lining, the surface of the pipe must be shot-blasted before the lining of the pipe. Shot peening is divided into dry and wet shot peening and can be used for pickling if the two methods are not used