① plastic polyethylene tank tank molding good integrity, no welds, never leakage, strong impact resistance, high tensile strength, anti-oxidation, anti-aging properties, in line with food hygiene standards. ② the linear low density polyethylene (LLDPE) excellent performance and rotomolding tank special structure, the service life of more than 15 years. ③ very excellent chemical resistance, except for a few solutions can swell it, it almost can be resistant to most of the substance solution. ④ plastic tanks have internal and external corrosion, and can be placed in highly corrosive environments. General conditions for the tank ⑤ normal temperature and pressure; special cases, the condition may be a storage tank using a temperature lower than 70 ℃ and hydraulic less than 1kg / cm2. ⑥ rotomolding tank corrosion on large-sized large-capacity bulk products have a very big advantage, though bulky, but only once and then maintain the integrity of forming characteristics, which is less than the Department processes by up to other tanks. ⑦ compared to traditional tank corrosion, low cost, high performance and low cost.