First, the reason why use flexible metal hose:
Pipeline installation stress in complex pipeline systems, often due to space location conditions, resulting in installation difficulties: molded pipes can not be installed; Depending on the pipe diameter and the specific situation on the site, the amount of cold correction can vary from a few millimeters to tens of millimeters, some up to hundreds of millimeters. Practice has proved that the larger the amount, the higher the internal stress, these residual installation stress in the pipeline system, is undoubtedly a great recess. A section of bearing lubricant duct in a certain type of engine, in the actual operation of a number of fracture accidents, is due to the installation stress is too high. Because the internal stress produced by bending at will and under the rated bending radius is very small, it can bring great convenience to the installation work and play a certain role in ensuring the safe operation of the pipeline system. This is the main reason why metal hoses must be used in some pipeline systems. Compensation pipe position Due to the need to load and unload the mold, the active cylinder on the vulcanization machine will move up and down. Copper serpenter after repeated movement, fatigue fracture will occur, although after repair can continue to use, but parking repair will cause time loss. Although the rubber tube has good soft characteristics, anti-fatigue ability is also very strong, but in the pressure, temperature resistance, anti-aging and other aspects are weak links, general use of a few months later, can not continue. The good comprehensive performance of metal hoses is fully reflected here. In the general industrial field, in addition to pressure, temperature, there are often some such as fatigue, corrosion, vibration, compression, shock and other harsh conditions, in such cases, to compensate for the position of the pipeline movement is the most appropriate. The ability to absorb vibration not only improves the system’s ability to fatigue damage, but also reduces noise. This is why some line systems use flexible metal hose.
Second, the principle structure of the metal hose:
Flexible metal hoses are generally composed of bellows, mesh sleeves and connectors. The bellows are the ontogenes of metal hoses, which play a flexible role, the mesh sleeve plays the role of strengthening and shielding, and the joints play a connecting role. For different use requirements, they are connected to each other in different ways: bellows, mesh sleeves and joints in the form of welding, called welding, in the form of mechanical clamping, called mechanical clamping, in addition to the above two methods, called hybrid. Metal hose products include oil-absorbing hoses, steam hoses, sand blasting hoses, acid-absorbing lye hoses, food hoses, blow-oxygen hoses and a variety of special-shaped hoses. Widely used in machinery, chemicals, petroleum, metallurgy, food and other industries. What is the pressure range of the pressure-resistant metal hose: The pressure range of the hose is generally PN0.6-32.0Mpa. Up to 42.0MPa. Metal hose is the main pressure part of the hose installed in the pressure line, at the same time to the bellows to act as a sheath, according to the pressure size of the pipe and the application site, you can choose one or more layers of stainless steel wire or steel belt weaving
