What grade does the military star tube belong to?

The subject wants to ask what grade the military star floor heating pipe belongs to? Military star floor heating pipe belongs to high grade. Military star floor heating pipe is one of the top ten brands of floor heating pipe, and has won many honors such as "National Inspection-Free Product", "AAA Credit Enterprise" and "Keeping Contract and Paying Attention to Credit". In 2009, "Xing Jun" brand trademark was recognized as "China Famous Trademark" by the Trademark Office of the State Administration for Industry and Commerce, and passed the certification of quality, environment and occupational health management system. It is one of the large-scale plastic pipe manufacturers in China, and also the leading plastic pipe manufacturer in Tianjin, so Xing Jun floor heating pipe belongs to high-grade. Xing Jun Pipe Industry Group is a high-tech group enterprise integrating new plastic pipes, composite reinforced pipes, pipe fittings and control devices, municipal engineering, mechanical and electrical equipment installation, import and export trade and marketing. The company has more than 200 sets of production, detection and test equipment, which can produce cold and hot water, reclaimed water, glass fiber reinforced pipes, plastic aluminum steady-state pipes, water supply, gas, polyethylene pipes under coal mines and ground source heat pumps.