The service life of polyethylene (PE) tarpaulin depends on many factors, including material quality, use environment, care and maintenance, etc. Generally speaking, high-quality PE tarpaulins can last for many years with proper use and maintenance, but the specific life span may vary. The following are some factors that affect the life of PE tarpaulins:

1. Material quality: Higher quality PE tarpaulins are usually made of tough and durable polyethylene material, which may have a longer lifespan. However, lower quality tarps may be more susceptible to environmental degradation.

2. Use environment: The use environment of the PE tarpaulin will have an important impact on its life. Tarps may degrade and wear out faster when exposed to extreme conditions such as strong sunlight, heat, cold, rain, storms, etc.

3. Frequency of use: A tarp that is used frequently may wear out faster, compared to a tarp that is rarely used or used seasonally.

4. Care and maintenance: Regular cleaning, waterproofing and proper storage can prolong the life of the PE tarpaulin. Proper maintenance prevents the build-up of dirt, mold and corrosion.

5. Physical Damage: The tarp may suffer rips, scratches or other physical damage which may shorten its lifespan.

Typically, a good quality PE tarpaulin can last for several years or even longer if proper care and maintenance are taken.