The service life of gas hose can be up to two years.1. The shelf life of gas soft is generally 18 months, and the maximum use shall not exceed 2 years. The length of the gas hose should not exceed 2 meters. If it exceeds 2 meters, there should be no seam in the middle. Hose clamps must be installed at both ends of the hose to prevent the hose from going through the wall. Meanwhile, the shelf life of gas hoses is usually 18 months and up to 2 years. In addition, after using for a period of time, the gas hose should be checked frequently to see if it is cracked, aged or bitten by rats. The service life shall not exceed two years.2. Gas metal hose consists of three parts: bellows, net sleeve and connector, and the main body is bellows. The bellows has good flexibility. Because of its longitudinal stiffness and bending stiffness is small, the main parts of the hose are made of austenitic stainless steel, which ensures the excellent temperature resistance and corrosion resistance of the hose. The working temperature range of the hose is wide, from -196 degrees to 600 degrees. According to the corrosiveness of the medium passing through the pipeline, the use of appropriate stainless steel brand can ensure the corrosion resistance of the hose. Make it work smoothly within the rated bending radius. Natural gas metal hose outer mesh sleeve (steel belt mesh or mesh sleeve) plays a reinforcing role, is the "skeleton" of the metal hose. According to the diameter and pressure of the hose can be divided into one layer, two layers or three layers. The net sleeve is the main pressure-bearing parts of the metal hose, so that the metal hose has a certain load-bearing capacity. Natural gas metal hose braided net sleeve strengthens the protection and makes it have higher carrying capacity. Usually, the two ends of natural gas metal hose are connected to form a flange connection. There are two kinds of flanges, carbon steel and stainless steel, and the material depends on where the product is used.3. Gas metal hose has the following advantages: stainless steel hose with flexible pitch; stainless steel hose is corrosion-resistant, high temperature-resistant, and does not block; stainless steel hose is light in weight and has a consistent caliber; stainless steel hose is soft and flexible for repeated bending; stainless steel hose has a good resistance to corrosion and high temperature resistance; stainless steel hose has a very strong Resistance to bending, tensile strength and resistance to side pressure. 4. The general service life of the gas hose made of rubber is about one and a half years, up to two years, and the length is not more than two meters. When used, it must not pass through doors, windows, walls, etc. The hose should be fixed with a hose at both ends. If the hose becomes hard, sticky, ruptured, etc. during use, it should be replaced in time. Extension:It is recommended that users buy some new high-tech safety products, such as corrugated stainless steel hose, with a service life of about 8 years, which is in line with the end-of-life of stoves and water heaters. Corrugated stainless steel hose is divided into two layers:the inner layer is stainless steel, which can prevent aging and cracking, and the outer layer is corrosion-resistant material, with threaded connection at both ends, which is not easy to fall off. However, it should be noted that the corrugated stainless steel hose is only suitable for embedded cookers, and the metal wrapped hose can also be used to move the cooker on the table.