PVC Hose Classification Of Raw Materials, Do Not See, Do Not Know, A Look, Scared
PVC hose (sanitary plastic hose, plastic hose, plastic corrugated pipe, food grade sanitary hose, hose, hose imports) have been widely used in water supply pipelines and gas pipeline system, but in recent years in the field of gas transportation pipeline system PVC market share near zero, the amount of water supply system has a little decline. However, PVC hose gained steady growth in non pressure piping systems such as drainage, sewage and waste discharge system in consumption, mainly because of the raw materials for PVC production depends on crude oil than other thermoplastics, so the production cost is relatively low.
Hoses (plastic bellows and inlet hoses) can be designed with solid walls or structural walls, and their connections are mainly solvent bonded. According to whether the use of plasticizers, can be divided into hard PVC (corrosion resistance and high temperature resistance performance is relatively high, and at the same time, the cost is relatively high).
Although the PE pipeline system does not have a cost advantage (relatively high raw material prices), it has been rapidly promoted and popularized. This is mainly due to the rapid, convenient and safe connection of the PE hose, that is, hot melt connection. Teflon hose hose (because PE sanitary plastic hose, plastic hose, food grade polyethylene hose, hose, sanitary hose, hose inlet) characteristics of the melting temperature range and melt viscosity determines the welding of PE tube has excellent, so that the PE melt reaches and exceeds the strength of the main body of the joint hose connection strength. In addition, the use of PE electrofusion connecting pipe fittings can also make the repair work of the PE pipeline system easy and convenient, thereby improving the safety and reliability of the pipeline.
PP hoses (sanitary plastic hoses, plastic hoses, polypropylene hoses, food grade hoses, sanitary hoses, inlet hoses) have been used in piping production since 1970s. According to the difference of polymer structure, PP material can be divided into three categories: PP-H (homopolymerization polypropylene), silica gel hose PP-B (block copolymer polypropylene) and PP-R (random copolymerization polypropylene).
The PP-R piping system is an important part of the building's cold and hot water piping system. China has experienced the promotion of PP-R plastic pipe system boom, but unfortunately, due to the interference of fake and shoddy products and unqualified products, PP-R pipe market and sustainable development has not been very good, but left to the market "plastic pipe is not durable" bad impression, so that a lot of water supply pipeline system construction designers and developers and have lost the confidence of the plastic pipe. From a technical point of view, there are many reasons for the failure of substandard products. On the one hand, there is no use of qualified raw materials, in the early development of plastic pipe, practitioners understanding for the raw materials of the long-term performance and strength is not enough for the evaluation of raw materials, method of understanding is not deep enough; on the other hand is the connection of the system is a problem, because the PP-R pipe modulus in the plastic hose is relatively large, so the joints prone to excess stress, especially in the joint of steel plastic transition cycles of hot and cold water after a period of time, the leakage will occur frequently.
Hangzhou Neetrue Irrigation Facilities Co.,Ltd
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