Requirements are specified for rubber and plastic hoses and components used to transport gasoline, kerosene, fuel, and lubricants in road and rail tankers for petroleum products, including aviation fuel with an aromatic content not exceeding 50% at temperatures up to 80℃.
Rubber hose pipes are designed for specific fluid, temperature, and pressure ranges, and come in a variety of specifications. Rubber hose pipes consist of at least three layers: a seamless synthetic rubber tube, one or more layers of braided or spiral reinforcement made of cotton, wire or synthetic fiber, and an outer cover. The inner tube is designed to withstand the attack of fluid passing through it. The braiding or spiral layer determines the strength of the hose, with more layers indicating higher pressure ratings. Hoses provide three pressure ranges: low, medium, and high. The outer cover is designed to withstand external damage and contains identification markings.
Rubber hose pipes are probably the most common material used for connecting tools and mobile devices to compressors or main pipelines. Rubber hose pipes with thermoplastic outer layers can also provide additional abrasion resistance and improved weather resistance. The temperature range of rubber hoses is -30℃ to 70℃. Rubber hose pipes are widely used in conveying systems of pipelines and bends, as well as in systems that require a certain degree of natural flexibility. Its special properties also make it ideal for systems where the material being transported may be fragile, abrasive, or viscous. Its natural flexibility makes it ideal for vacuum unloading applications, mobile conveying systems, and connecting pipeline sections when standard pipeline bends do not match the required geometric shape. In many applications, rubber hose tubings are used for pneumatic conveying lines. They are widely used in transport situations where rigid lines are not feasible, especially in loading and unloading of ships and road vehicles.
Rubber hose pipes in some cases have better anti-erosion capacity than steel pipes. Although the hardness of the surface material is usually far lower than that of alternative metal surfaces, and the hardness of the surface material is lower than that of the particles impacting the surface, its corrosion resistance comes from its ability to absorb most of the impact energy. Its toughness. Through the same mechanism, the impact energy of brittle materials can also be absorbed, thereby significantly reducing particle degradation. In extremely low-speed dense phase flow, the resistance of rubber hose tubing is slightly lower than that of steel pipes. However, in high-speed dilute-phase conveying, the resistance of rubber hoses can be 50% higher than that of steel pipelines.
