Ordinary PE (polyethylene) tarpaulins can be used for several years under normal conditions. PE tarpaulins are known for their durability and resistance to water, UV radiation, and mildew. They are commonly used for various purposes such as covering and protecting items, temporary shelter, construction sites, camping, and more.

With proper care and maintenance, an ordinary PE tarpaulin can last anywhere from 3 to 5 years or even longer. Regular cleaning to remove dirt and debris, avoiding prolonged exposure to harsh weather conditions, and storing it properly when not in use can help extend its lifespan.

However, it's important to note that the lifespan of a PE tarpaulin can still be influenced by factors such as the quality of the material, frequency of use, intensity of weather conditions, and overall wear and tear. It's always recommended to inspect the tarpaulin regularly for any signs of damage or weakness and replace it if necessary to ensure proper functionality and protection.