About automotive rubber hoses
Release time:
15 Nov,2023
The automotive piping mainly consists of two categories: rubber hoses and metal pipes, which are responsible for the transmission of oil, water, antifreeze, gas, and liquid pressure. Among them, rubber hoses are more varied and are a major component of automobiles. Compared to metal pipes, automotive rubber hoses are soft, consist of single prefabricated parts, and have various shapes; therefore, rubber hoses are often used in cooling, air conditioning, and power steering.
The main materials for automotive hoses generally include ethylene propylene diene monomer (EPDM) rubber, nitrile oil-resistant rubber, neoprene rubber, fluorine rubber, and ethylene propylene rubber. Automotive hoses are required to operate within a wide range of environmental temperatures, from -40°C to +120°C, and must be resistant to corrosion and aging. They should also have certain hardness and tensile strength.
Although the structures of automotive hoses for different purposes vary, they are generally divided into three parts: the inner rubber layer, the middle reinforcement layer, and the outer rubber layer. The inner rubber layer is the layer that directly contacts the conveyed medium, serving to guide flow and seal. The inner layer should have a certain thickness and be resistant to temperature and corrosion; the reinforcement layer is the part of the hose that bears pressure and has considerable support strength; it protects the hose structure and increases pressure resistance; the outer layer is the protective layer of the hose, serving a defensive role, and should have a certain thickness, being resistant to temperature, corrosion, abrasion, and aging.
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