What Should be Paid Attention to When Using Cast Iron Pipes?
Nov. 11, 2020
As a Cast Iron Pipe Joints Factory, share with you.
Cast iron pipe refers to the pipe formed by the high-speed centrifugal casting of the centrifugal ductile iron machine after the molten iron of No. 18 or above is added with spheroidizing agent. Tube and so on.
The ductile iron pipe industry started in the early 1990s. With the strong support of the China Urban Water Supply Association, it has developed rapidly. After nearly 30 years of theoretical application, its safety and applicability have been generally recognized by the water supply industry. The output has reached 2.2 million tons, 11 times that of 1990.
Cast Iron Drain Pipe
Since China is a country lacking water resources, there are more than 600 water-deficient cities and more than 200 severely water-deficient cities. Water supply and water conservation is in the ascendant. Ductile iron pipes have broad prospects for development. Ductile iron pipes are one of the cast iron pipes. Kind. In terms of quality, the spheroidization grade control of cast iron pipes is required to be 1-3 (spheroidization rate "80%).
The internal anticorrosion adopts the centrifugal cement mortar lining. The surface is required to be evenly lubricated without cracks. The external anticorrosion adopts zinc spraying and bitumen coating. The zinc spraying is in accordance with the international ISO 8179 standard. Safety evaluation norms
The quality requirements of the rubber ring and the experimental methods should be in accordance with the specifications of the interface rubber ring for water supply and drainage pipelines. Cast iron pipes are widely used in the field of industry and mining! Cast iron pipes have good mechanical properties, and the overall efficiency of consumption is also changing from time to time. Among the advancements, cast iron pipes have great advantages, and ductile iron pipes not only have the characteristics of steel.
At the same time, it also has the performance of iron. In terms of performance, it is also upgraded from time to time. After the completion of the manufacture, the ductile iron pipe has good mechanical properties and the advantages of opposite corrosion. In the process of use, ductile iron The tightness of the tube is also very good, and the simple device can be stopped afterwards.
Therefore, the material's own mechanical ductile iron pipe waste warehouse can be better improved, with the essence of iron and the performance of steel. The annealed ductile iron pipe has a metallographic structure of ferrite plus a small amount of pearlite, good mechanical properties, excellent corrosion resistance, good ductility, good sealing effect, simple installation, and mainly used for water supply and gas transmission in municipalities, industrial and mining enterprises , Oil and so on.
A certain amount of spheroidal graphite is scattered on the ferrite and pearlite matrix. According to the nominal diameter and the requirements for elongation, the ratio of ferrite and pearlite in the matrix structure is different. The ratio of pearlite with small diameter Normally it is not more than 20%, and the normal control for large-caliber is around 25%.
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