Generally speaking, the service life of an industrial boiler should be over 15 years. However, there can be significant variations in the service life of industrial boilers. The following factors can affect the service life of a boiler: 

1. Boiler size: You need to purchase a boiler size that is suitable for your business. If the boiler you purchase is too small, it will have to work overtime to meet your needs, which will consume the boiler's service life.

2. Boiler installation: You need to ensure the boiler is installed correctly to maximize its efficiency. If you hire professionals to install the boiler, its lifespan should be longer.

3. Boiler maintenance: The boiler should undergo regular maintenance to ensure it can operate for many years.

These are just a few of the many factors that influence a boiler's lifespan. If you want the boiler to last as long as possible, you need to maintain it properly.