PP pipes are widely used in chemical industry, environmental protection, food hygiene, construction water supply and drainage and other fields. PP pipes can transport various corrosive media below 90 degrees Celsius, and their rigidity and compressive strength are superior to traditional plastic pipes. Since the composition of the pp pipe is produced by using the glass fiber modified propylene material treated with the coupling agent, the pipe is resistant to rust, wear, no scaling, less vibration and noise, and anti-freeze cracking and anti-caking. It has good dew performance, less heat loss during use, and has the advantages of simple installation and long service life.
If it is the appearance of the same raw material, pay attention to choose a pipe with a thicker wall thickness as much as possible. PP pipe is a non-toxic, hygienic, high-temperature-resistant and recyclable pipe type, so it has become a widely used material for building supply systems and is also widely used in chemical heating systems. . pp tube is usually a translucent colorless solid, a non-toxic, odorless, tasteless milky white high-crystalline polymer, with strong acid and alkali resistance, good chemical stability, in addition to being corroded by concentrated sulfuric acid and concentrated nitric acid, Various other chemical reagents are relatively stable.
The pp tube has strong resistance to organic solvents and low density. It is a light general-purpose plastic with excellent electrical properties and high-frequency insulation that is not affected by humidity. pp pipe is harder than PE pipe and has a good melting point. PP pipes are widely used in the automotive industry, equipment, consumer goods, indoor cold and hot water supply systems, and heating systems in buildings. PP pipe is a thermoplastic resin obtained by polymerizing propylene, and PP is a semi-crystalline material. The end face of the pp pipe should be perpendicular to the axis of the pipe. The pipe fittings should be complete, free of defects and deformation; the inner and outer walls of the pp pipe and the pipe fittings should be smooth and flat, free of bubbles, cracks, peeling and significant marks and depressions, and the color should be basically the same.
The surface of the pp tube accumulates dust containing other metal elements or the attachments of heterogeneous metal particles. In the humid air, the condensed water between the attachments and the stainless steel connects the two into a micro-battery, which triggers an electrochemical reaction. The damage to the protective film is called electrochemical corrosion. The surface of the pp tube is adhered to the organic juice. In the presence of water and oxygen, it constitutes an organic acid, and for a long time, it constitutes the corrosion of the metal surface by the organic acid. The surface adhesion of the pp pipe contains acid, alkali and salt substances (such as alkali water and lime water spraying on the decoration wall), which causes local corrosion. In the polluted air, when encountering condensed water, it forms the liquid point of sulfuric acid, nitric acid and acetic acid, causing chemical corrosion.
