Mainly applicable to industry
1. Weak corrosive materials in chemical and petrochemical production, such as water, ammonia, oil products, hydrocarbons, etc.
2. Corrosive materials in chemical production, such as caustic soda, concentrated dilute sulfuric acid, carbonic acid, acetic acid, etc.
3. Cryogenic materials in refrigeration, such as liquid methane, liquid ammonia, liquid oxygen, and various coolants.
4. Light industrial food, pharmaceutical production of health requirements of the material, such as: beer, beverages, dairy products, grain-pul, and medical supplies.