What Material Is Good For Hose?

PVC hoses (sanitary plastic hoses, plastic hoses, plastic bellows, food grade hoses, sanitary hoses, import hoses) have been widely used in water supply piping systems and gas piping systems, but in the past few years, the market share of PVC piping systems in the field of gas transmission has been almost zero, and the number of water supply systems has decreased slightly. However, the use of PVC hoses in non-pressure piping systems such as drainage, sewerage and waste systems has steadily increased, mainly because the production of PVC raw materials relies less on crude oil than other thermoplastics, making it relatively cheap to produce. Hoses (plastic bellows, imported hoses) can be designed with solid walls or structural walls, and their connections are mainly solvent bonding. According to whether to use plasticizer, can be divided into hard polyvinyl chloride (PVC corrosion resistance and high temperature resistance is higher, the cost is also higher). Although the PE piping system has no cost advantage (the price of raw materials is relatively high), it has been rapidly promoted and promoted. This is mainly due to the fast, convenient, safe and reliable connection method of PE hose, that is, the hot melt connection method. Due to the melting temperature range and melt viscosity of PE hoses (sanitary plastic hoses, plastic hoses, polyethylene hoses, food grade hoses, sanitary hoses, import hoses), PE hoses have excellent weldability, making the strength of PE hot melt joints reach or even exceed the strength of the hose body. In addition, the use of PE fusion connection pipe fittings can also make the maintenance of PE pipeline system simple and easy, thereby improving the safety and reliability of the pipeline. Polypropylene hoses (sanitary plastic hoses, plastic hoses, polypropylene hoses, food grade hoses, sanitary hoses, import hoses) have been used in the production of pipes since the 1970s. According to the different structure of the polymer, PP materials can be divided into three categories: PP-H(homopolypp), silicone hose PP-B(block polymerized polypropylene) and PP-R(random polymerized polypropylene). PP-R pipeline system is an important part of the construction of hot and cold water pipeline system. China once set off a boom in vigorously promoting PP-R plastic pipe system, but unfortunately, due to the interference of fake and inferior products and unqualified products, the PP-R pipe market has not been a good sustainable development, but left people with a bad impression of "plastic pipe is not durable", so that many designers, developers and users of water supply pipe system have lost confidence in plastic pipes. From a technical point of view, there are many reasons for defective products to be damaged." For one thing, qualified raw materials are not used. In the early stage of the development of plastic pipes, practitioners do not have a deep enough understanding of the long-term performance and strength of raw materials, and their understanding of raw material evaluation methods is not deep enough. On the other hand, due to the large modulus of the PP-R tube in the plastic hose, it is easy to produce excess stress at the joint, especially after a period of hot and cold water circulation, steel-plastic transition joints often leak. Hose features Double buckle stainless steel hose 1, flexible between pitch. 2, has good flexibility, no blocking and stiffness. 3, light weight, good caliber consistency. 4, flexibility, repeated bending, flexibility is good. 5, corrosion resistance, high temperature resistance. 6, anti-rat bite, good wear resistance, prevent internal wires from being worn. 7, bending resistance, tensile performance, strong resistance to side pressure. 8, soft and smooth, easy to thread installation positioning. The corrosion resistance of stainless steel hose depends on the content of chromium, when the amount of chromium added to 10.5%, the atmospheric corrosion resistance of steel is significantly increased, but when the chromium content is higher, although the corrosion resistance can still be improved, but not obvious. The reason is that when the steel is alloyed with chromium, the type of surface oxide is changed to a surface oxide similar to that formed on pure chromium metal. This tightly adhered chromium-rich oxide protects the surface from further oxidation. This oxide layer is extremely thin, through which the natural luster of the stainless steel surface can be seen, giving the stainless steel a unique surface. Moreover, if the surface layer is damaged, the exposed steel surface will react with the atmosphere to repair itself, re-forming this "passivation film", which continues to play a protective role. Shanghai Tianqing main all kinds of food grade hoses, pharmaceutical grade hoses and chemical hoses, welcome to inquire