Carat tube is a kind of high-density polyethylene structural wall heat wound pipe, HDPE winding structural wall pipe, is a new type of special-shaped structural wall pipe made by high-density polyethylene hot winding molding process. Carat pipe products are mainly made of high-density polyethylene resin (HDPE), PP or PE bellows are used as auxiliary support pipes, and high-density polyethylene large-diameter winding reinforced pipes produced by the hot winding molding process. Since this type of tube was originally introduced by a domestic company of the German carat company, this type of tube is often called a carat tube in China. The official name of this type of pipeline in China is: high-density polyethylene structural wall hot winding pipe, and the national standard is GB/T19472. 2-2017 Type B Structural Wall Pipe.
    Advantages of carat pipe in pipeline construction: Carat pipe product is an environmentally friendly and safe product, which has the advantages of light weight, strong pressure bearing capacity, high interface quality, long life, corrosion resistance, high ring stiffness, and easy to use. Construction. It is widely used in urban water supply, drainage, long-distance water transmission and farmland irrigation. The pipe diameter is DN300 to DN4000, the pipe is light in weight and has good overall flexibility. It is currently the main plumbing option for buried sewage and drainage.
    At present, the internal pressure of high-density polyethylene winding reinforced pipe can reach 12kg/cm2, which is an ideal pipe to replace the original drainage cast iron pipe cement pipe in the city;   Carat pipes are also used in municipal management of underground drainage, sewage, rainwater collection, water conveyance, ventilation, etc.; It is used to discharge liquid and gaseous substances into rivers or oceans. Thermal structural wall spiral wound pipe has the advantages of light weight, safety, reliable connection, corrosion resistance, and high ring stiffness, so the use of thermal structural wall pipe has great advantages. Carat pipes are also used in large-scale water conservancy projects: long-distance water transportation, farmland irrigation, sludge extraction in reservoir areas, water source pipes, irrigation pipes, and hydropower station water transmission and drainage; Carat pipes are also used in environmental protection projects: deep-sea sewage, sewage treatment, garbage dump sewage, sewage pipes. A variety of pipe wall structures and pipes with winding pipes, inspection wells and pipe fittings can be used in advanced shallow drainage systems due to their reliable connection properties. Carat pipes are also used in oil and gas pipelines in the petroleum industry; Coal transportation projects in the coal industry, various ventilation systems; chemical vessels for chemical engineering, especially corrosive fluid pipelines; circulating water pipelines for power engineering; crossings of roads and railways and other high-traffic culverts and pedestrian crossings; used as a drainage pipe for railways and highways; The "pipe lining" method is used to refurbish damaged pipes. More importantly, laying pipes in the surrounding corrosive environment.