Profile: Hebei Yongchang Composite Material Technology Co., Ltd. specializes in fully automatic microcomputer-controlled filament winding production lines. Our products are widely used in the chemical engineering, light industry, pharmacy, metallurgy, brewing, electrochemical water supply and drainage, petroleum refining, steel-making, printing and dyeing, transportation and storage, food brewing, fermentation, water treatment, seawater desalination and other domestic and foreign industries. FRP nitrogen sealed water tanks are generally used in ultra-pure water systems, that is, nitrogen is filled on the water surface of the water tank to maintain a proper positive pressure in the tank and prevent the atmosphere from contacting the water surface in the tank.