Scrap is eliminated in production engineering life or damage as a recycling scrap steel; carbon content which is generally less than 2.0%, a sulfur, a phosphorus content of not more than 0.05%. In general, the scrap generated in the social life of scrap, which is mainly scrap iron and steel equipment and furniture including electrical appliances and other scrap generated by common bicycle rack, car shell and so on; scrap iron and steel metallurgy generated in the production process The scrap produced in the steel and the scrap produced during the mechanical manufacturing process, in the steel industry, due to the inevitable occurrence of steel slag splashing during the production process, the cutting of the billet, etc., the scrap produced is the self-produced scrap of the steel mill. Among them, the cutting head of the billet has been produced in large quantities in the molding era, and the amount produced after the continuous casting has been greatly reduced; the scrap produced in the machining process is due to the uniform composition and rust-free factors. Can be used as recycled scrap, but the scale and quantity are small. Because of the different conditions, scrap steel has various shapes, and its performance is basically the same as that of the scrap steel. However, it is also affected by factors such as aging effectiveness and fatigue, and its performance is reduced. The geographical distribution of steel resources is not balanced. More than 80% of the scrap steel resources in the country are distributed in Beijing, Tianjin, Shanghai, Guangdong, Liaoning, Heilongjiang, Jin, Lu, Hubei, Sichuan and Jiangsu. The provinces and cities with dense populations; other regions have less than 20% of scrap resources due to poor geographical conditions and small population. Scrap processing is generally mechanically processed, and common machinery is a press machine, a cutting machine, and the like. Scrap steel is mainly used for steelmaking additives in long-flow converters or steel-making main materials in short-flow electric furnaces. Domestic scrap resources: The rapid growth of China's crude steel output is mainly from 2000, with an annual growth rate of about 20%. As a result, about 50% of China's social steel stock is produced in 2000 and beyond. Due to the limitation of the number of years of elimination, China has become a poor period of scrap steel resources, and can not meet the needs of the rapid development of the steel industry. According to the scrap data of China Business Network, in 2009, the scrap consumption of major domestic steel mills was only about 120 kg. , in a state of decreasing year after year. In 2009, China's annual import of scrap steel reached 13.6692 million tons, a record high, and the annual import scrap cost reached 5.068 billion yuan. Scrap Standard: The national scrap standard was issued in 2004, and the national scrap standard was abolished in 1996. press fittings produces accorindg to park ,connex ,vigea and nibco,Approved watermark Press Fittings，press fittings，vigea press fittings，Nibco press fittings Taizhou Runde Company , https://www.smartfittings.com