The Code for Design of Town Gas clearly stipulates that the service life of ordinary rubber hoses is 18 months, and the longest is no more than two years. Although, it seems that the rubber tube has been covered with a layer of oil smoke, the surface is black and dirty, and even the rubber outer layer is aging and cracked in some places, and no leakage is found. It can be seen that the quality and durability of the hose are still good. Your gas pipe should have been changed a long time ago. After all, life safety is the most important thing. As long as qi is involved, we must be cautious. Because the material of gas hose is plastic, the plastic will age and crack after a long time. For many families, gas hoses are only used without inspection, so it is not recommended to use gas hoses for too long.
Secondly, the gas company will not force you to change. At most, they will remind you to change. If you insist on not replacing it, according to the company's system, you don't have to sell it to you for safety. Although the hose used for five years has no obvious cracks, it must be replaced for safety reasons. Now the plastic hose is replaced by stainless steel hose, and the best quality stainless steel hose is 40 yuan 1m (including installation), so it is safe to use. Some hoses will be weathered in a few years, and some with good quality will be fine, depending on the actual situation.