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Water Supply Pipe Is Widely Used In The Industry Market Potential

With the development of cast iron pipe production technology and technical progress. Today, centrifugal ductile iron pipe has become the most important production process of cast iron pipe. The domestic use of gray cast iron pipe has gradually shifted to the centrifugal ductile iron pipe. Ductile iron pipe should not only have a high tensile strength, at the same time should have a higher elongation, in accordance with international standards ISO2531 requirements, ductile Iron pipe tensile strength Saka 420mpa, Dn40-Dn1000 pipeline, elongation rate Seper, Den1200 pipeline, elongation rate ≥ 7%. Because of the elongation of the wood pipe, the control range of the harmful components of the molten iron is wide.
Metal pipelines in the early construction of water distribution network, the use of lead pipes, which is a good corrosion-resistant metal pipeline. The oxide film formed on the surface of the lead tube has been considered non-toxic. Now analyzing the water quality change in the process of pipe network transmission and distribution, it can be found that the main reason leading to the decrease of water quality of pipe network is the most small caliber galvanized steel pipe. In particular, the user's internal pipeline. On the one hand, the small-caliber galvanized steel pipe is used, and the protective measures such as liner coating are seldom used, and the pipe quality of the internal pipe is poor;
Cast iron Pipe is one of the most familiar and widely used pipelines. Cast iron is iron and carbon alloy, carbon in cast iron quality fraction is higher than 2.11%, carbon content below this ratio, is Low-carbon steel. The use of low carbon steel production of steel pipe, processing and installation is more convenient. The mechanical properties of steel tubes are superior to other pipelines, but they are treated in the surface of steel pipe, which is troublesome, and the cost of anticorrosion is high.
Plastic pipes are commonly used in water supply pipe network of plastic pipe can be divided into two categories. One is Polyolefin material: polyethylene (PE), high-density polyethylene (HDPE), polypropylene (PP), poly (Pb), this type of plastic pipe suitable for fusion (heating) connection. Another category is vinyl chloride: polyvinyl chloride (PVC), rigid polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC). Suitable for bonding (glue) connections.
PVC and PE pipes were used in the 60 's and applied to water supply piping works. In the early application, PVC pipe connection method is relatively simple, small-caliber PVC pipe using glue, bonding connection, medium-caliber PVC pipe using socket interface, the use of rubber ring seals, is an ideal flexible interface. As a result, the application of PVC pipe is wider than before. For the promotion of the initial PE pipeline, the use of heating connection method, construction is inconvenient. Early PE pipes, due to the material properties ' limitations, compressive strength and cracking resistance are not good. In order to withstand external pressure and internal pressure, the larger the caliber of PE pipe, the thicker the pipe wall. Because the thicker tube wall can ensure that the pipe has enough stiffness. Large-caliber PE pipe, the pipe wall is relatively thick. The increase in material usage increases the cost. Therefore, the promotion of the initial PE pipe, generally no more than DN300, mainly for indoor piping and distribution network.
Polyvinyl chloride (PVC) is usually a multi-component plastic, PVC in heat, oxygen, light, the structure will change. Therefore, the PVC process must be added stabilizer. In order to improve the surface properties of PVC pipes, reduce the shrinkage and coloring of pipes, other processing aids, fillers and pigments should be added. The common PVC in pipelines is to improve the brittle and hard performance of PVC and to add plasticizer in production. We will be the plasticizer content in the 0-12 range of PVC pipe, known as the PVC pipeline.
CPVC is a product of further chlorination of PVC. The difference between CPVC and PVC is that the chlorine content is different, and the degree of chlorination of CPVC is higher. The chlorine content of general PVC is $number, and the content of CPVC chloride is 63-74. This is caused by the different ways of chlorination and the technical level of production. Due to the increase of CPVC chlorine content, the anti-aging and compressive properties of CPVC pipeline are improved greatly. It can be seen that the CPVC pipeline is the improvement of the traditional PVC pipeline.
PVC pipeline is widely used in water supply pipe network because of its simple construction and good hydraulic condition. With the increasingly stringent environmental requirements, water quality indicators to increase, taking into account the health and safety factors, PVC pipes in the use of additives and other production processes must be constantly improved.

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