The service life of PVC irrigation pipes can be affected by a variety of factors, including material quality, environmental conditions, operation and maintenance, etc. In general, good quality PVC irrigation pipes can last for several years or even longer, but the exact lifespan will vary depending on the factors mentioned above.

The following are some key factors that affect the service life of PVC irrigation pipes:

1. Material quality: High quality PVC pipes usually have better durability and weather resistance. Buying products from reputable brands or trusted suppliers can reduce the risk of early failure due to material quality issues.

2. Environmental conditions: PVC pipes exposed to extreme temperatures, UV radiation, chemicals, or other harsh environmental conditions may age and degrade faster. Proper protection, such as shading, regular cleaning and maintenance, can extend the life of your pipes.

3. Operation method: The correct operation and use method can reduce the damage to the pipeline. For example, avoiding excessive stress or bending on the pipes, and avoiding the use of excessive water pressure can prolong the life of the pipes.

4. Maintenance and maintenance: Regular inspection, cleaning and maintenance of PVC pipes can help to find and fix potential problems to avoid more serious damage.

Well maintained PVC irrigation pipes can last 10 years or more. However, please note that this is a general estimate and actual life may vary on a case-by-case basis.