What are the hose specifications? Introduction of hose raw material classification

The hose is an important part of modern industry, which can be used in many places. The most common one is the bathroom. Although it is a common thing, many people do not know much about the specification and essence. What are the hose specifications? What are the main types of hose materials? Let’s give you a brief introduction.

Introduction to the classification of hose materials:

    PVC hose (sanitary plastic hose, plastic hose, plastic bellows, food-grade hose, sanitary hose, imported hose) has been widely used in water supply pipeline systems and gas transmission pipeline systems, but in recent years, the market share of PVC pipeline system in the field of gas transmission is nearly zero, and the consumption of water supply system has also declined slightly The consumption in the drainage, sewage and waste disposal systems increased steadily, mainly because the production of PVC raw materials was less dependent on crude oil than other thermoplastic plastics, making its production cost relatively low.

    Flexible pipe (plastic bellows, imported hose) can be designed with a solid wall or structural wall, and its connection mainly adopts a solvent bonding method. The use of plasticizers can be divided into rigid polyvinyl chloride (the corrosion resistance and high-temperature resistance are relatively high, and the cost is relatively high.

    Although the PE pipeline system does not have a cost advantage (the price of raw materials is relatively high), it has been rapidly promoted and popularized. This is mainly due to the fast, convenient, safe, and reliable connection mode of PE hose, i.e. hot melt connection. Because of the melting temperature range and melt viscosity characteristics of PE hose (sanitary plastic hose, plastic hose, polyethylene hose, food-grade hose, sanitary hose, and imported hose), PE hose has excellent fusion weldability, which makes the strength of PE hot melt joint reach or even exceeds the strength of hose body. In addition, the reliability of PE pipes and pipes can be easily repaired.

    PP hose (sanitary plastic hose, plastic hose, polypropylene hose, food-grade hose, sanitary hose, imported hose) has been used in the production of pipes since the 1970s. According to the different polymer structures, PP materials can be divided into pp-h (homopolymer polypropylene), silicone hose PP-B (block copolymer polypropylene), and PP-R (random copolymer polypropylene).

    PP-R pipeline system is an important part of the cold and hot water pipeline systems for the building. There was once a boom in promoting PP-R plastic pipe systems in China. Unfortunately, due to the interference of fake and substandard products, the market of PP-R pipe has not been well-sustained development. On the contrary, it has left a bad impression on the market that the plastic pipe is not durable, so many architectural designers, developers, and users of water supply pipeline systems have a bad impression of the plastic pipe Tao has lost confidence. From the technical point of view, there are many reasons for the damage of unqualified products. On the one hand, no qualified raw materials were used. In the early stage of the development of plastic pipes, the practitioners did not have a thorough understanding of the long-term performance and strength of raw materials, and the understanding of evaluation methods of raw materials was not deep enough; On the other hand, there is a problem with the connection of the system. Because the modulus of the PP-R pipe is relatively large in the plastic hose, it is easy to generate excess stress at the joint, especially when the steel plastic transition joint is under the action of cold and hot water circulation for some time, there will be frequent leakage.

    The above is the hose specification and hose raw material classification introduction, I believe you should have more understanding after reading it, the content is only for your reference, I hope it can help you.

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