Large-caliber epoxy coal asphalt anticorrosive steel pipe does not accumulate scale, does not breed microorganisms, is a healthy pipeline, to ensure that the fluid is not contaminated by secondary pollution. Its fluid resistance is small, the inner wall is smooth, the transmission efficiency is high, the friction coefficient is, the roughness is, the roughness of galvanized steel pipe is. Large diameter epoxy coal asphalt anticorrosive steel pipe conveying energy consumption loss is small, can reduce the pump head, because the pump head can be changed by changing the impeller diameter, so can increase the flow or save energy. The inner wall of galvanized steel pipe is easy to scale and blockage. It sets the mechanical properties of steel and chemical corrosion resistance of engineering plastics in one, overcomes the defects of easy rust, high pollution and low strength and unreliable connection of the simple steel pipe itself, breaks through the limitations of low pressure and high application conditions of ordinary plastic pipes, and not only meets the requirements of high strength use of steel pipes. At the same time, it also has the characteristics of corrosion resistance, no scaling and low friction coefficient of plastic pipe, and its performance index (flame retardant index) reaches the level of gas pipe ' fire suppression and explosion, explosion suppression and multilevel protection ' , so it can be said that coal mine tile composite pipe, which is the designated fire fighting pipe and is also a comprehensive and high price environmental protection green pipe, is widely used in the field of fire sprinkler water supply.

Large-caliber epoxy coal asphalt anticorrosive steel pipe processing technology is divided into four kinds:hot dip plastic, high pressure static static spraying, rotoplastic, coated. And the processing process of the different connection mode is not the same. The raw materials required for this product are plastic powder and steel pipe. The beginning of the whole processing needs to purchase raw materials, the plastic powder generally used in fire protection is epoxy resin, the steel pipe model is seamless steel pipe, straight seam steel pipe or spiral pipe, the raw materials are purchased back for inspection, especially the steel pipe model and other organic matter composed of steel-plastic composite pipe, it not only has the advantages of high strength steel pipe, easy connection, water impact resistance, etc. Also overcome the steel pipe in the water corrosion, pollution, scaling and plastic pipe strength is not high, poor fire performance and other shortcomings. The main disadvantage is that the installation should not be bent, hot processing and electric welding cutting operations, cutting surface should be equipped with the manufacturer's room temperature curing adhesive coating.
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