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Ductile pipe and anticorrosion treatment - performance Industry news - The latest information - Ductile pipe, ductile iron pipes, ductile iron pipe, ductile iron pipe price

by:XEX     2021-01-01
Ductile iron pipe is a kind of cast iron, is a kind of an alloy of iron, carbon and silicon. Exists in the form of spherical graphite in ductile iron, usually the size of the graphite is 6 - Level 7, the quality requirements on pipes of nodulizing grade 1 - control Level 3 ( Spheroidization rate of 80% or higher) , and got better improvement on the mechanical properties of the material itself, has the nature of the iron, the performance of the steel. After annealing of nodular cast iron pipe, the microstructure of ferrite and a small amount of pearlite, better mechanical properties. Editing this section compared with PE pipe main call centrifugal ductile iron pipe, ductile iron pipes it has the performance of the essence of the iron and steel, anticorrosive performance, can good ductility, good sealing effect, easy to install, it is mainly used for municipal, industrial and mining enterprises, water supply, gas, oil, etc. Is the first selection of water supply pipe, has the very high cost performance. Compared with PE pipes, from the installation time, ductile pipe than PE pipe installation is more simple and quick, and installed inside and outside the bearing pressure is better; From the perspective on the impermeability and corrosion, ductile pipe installed in sealing better, also can improve the anti-corrosion performance through many kinds of anti-corrosion measures; From the point of hydraulic performance, because generally refers to the inner diameter ductile pipe specification, PE pipe specifications generally refers to the outer diameter, because under the condition of the same specification, ductile pipe can achieve greater runoff; From the point of comprehensive installation and maintenance cost, ductile pipe has more superior performance. The main composition of nodular cast iron pipe with carbon, silicon, manganese, sulfur, phosphorus and magnesium. Wall spray zinc, cement mortar anti-corrosion materials. Advantages of ductile cast iron pipe: in the low pressure pipe, ductile iron pipe is safe and reliable operation, low breakage rate, convenient construction and maintenance, quick, anti-corrosion performance, etc. The shortcoming of ductile iron pipes, ductile iron pipes even to accept a greater influence on the human factors such as operating level, the sense of responsibility, construction convenient than PE pipe. The advantages of PE pipe, PE pipe has good corrosion resistance of its inorganic resistance is much better than metal tube, do not need to corrosion when buried, construction is convenient. PE pipes on the cost performance is superior to the steel tube and ductile iron pipes. PE pipe have drawbacks: benzene, gasoline, carbon tetrachloride and other organic solvents of polyethylene has a certain impact. Organic solvent if infiltration in the polyethylene, there will be a swelling phenomenon, its physical properties are falling, its pressure resistance, low temperature resistance. Ductile pipe anticorrosion treatment 1. Bituminous paint coating bituminous paint coating is used for conveying gas pipeline. Spray paint on the pipe before preheating can improve the adhesion of asphalt paint, accelerate drying. 2. Cement mortar lining + special coating on the inner anti-corrosion measures suitable for transporting sewage pipeline, can improve the corrosion resistance of lining. 3. Epoxy coal tar coating epoxy coal tar coating was applied to gas pipeline, can also be applied to sewage pipe. It is a kind of two-component coating, the coating has good adhesion and 4 very smooth surface. Epoxy ceramic lining of ceramic epoxy lining applied to sewage pipeline and gas pipeline, but due to the manufacturing process is difficult, the cost is high, so there are some limitations on use. Epoxy ceramic lined with high adhesion and bright and clean degree, is a kind of excellent corrosion resistant coating. 5. Coating or sulfate aluminate cement concrete coating of these two kinds of special cement coating are suitable for sewage pipe with the ductile cast iron pipe corrosion protection, improve the erosion ability of resistance to acid-base components in sewage. 6. Polyurethane coating is a kind of order to adapt itself to the requirements of environmental protection and development of a new type of green, the special coating, good wear resistance and corrosion resistance.
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