20 17 LPG tanks have not expired, but they need to be inspected regularly.

According to the requirements of the latest edition of Technical Specification for Gas Cylinder Safety on the service life of gas cylinders, the service life of gas cylinders is eight years, and regular inspection is conducted every four years. Liquefied petroleum gas cylinders, also known as liquefied petroleum gas cylinders, belong to gas cylinders, so their service life is also eight years, and they should not be used before 2025.