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This post was last edited by Xin Ruifangxiao on 2025-6-10 13:12. Gaskets are important sealing elements in mechanical equipment; their function is to fill or connect two surfaces in order to prevent the penetration of fluids, gases, dust, and other substances. Gaskets are usually made of elastic materials, such as rubber, plastic, metal, or composite materials. However, under prolonged exposure to high temperatures, high pressures, or high stresses, gaskets may experience creep, which can affect their sealing performance and service life. Some friends might ask: What is creep? Creep is the phenomenon in which, under a constant stress, the strain in a solid material increases over time. Creep can cause the sealing material to deform, lose its elasticity, reduce its sealing performance, and even lead to equipment failure. Therefore, how to effectively reduce/avoid the creep of sealing materials is an important issue in sealing technology. 1. Use materials with good creep resistance. There are currently various sealing materials available on the market that possess good creep resistance, such as high-temperature PTFE, high-temperature rubber, and fluororubber. The molecular structure of these materials is stable, allowing them to maintain good physical and chemical properties in harsh environments such as high temperatures and high pressures, thereby effectively reducing the occurrence of creep. Materials with good creep resistance generally possess the following characteristics: high melting point – the higher the melting point of a material, the better its stability at high temperatures, and the less likely creep will occur. High hardness: Materials with high hardness have a greater ability to resist creep, as their molecular arrangement is more dense with smaller gaps between molecules, making deformation difficult. High strength: Materials with high strength do not deform easily under pressure, thereby reducing the risk of creep. High wear resistance: When a material has high wear resistance, friction on its surface can be effectively reduced, thereby decreasing the risk of fatigue damage and creep in the material. Corrosion resistance: The better a material’s corrosion resistance, the longer its service life will be, and the less impact it will have on creep. 2. Rational structural design: In the design of seals, it is necessary to take into account the physical and chemical properties of the materials, select an appropriate structure, avoid excessive compression, twisting, or stretching, reduce stress and strain on the materials, and thereby minimize the occurrence of creep. Additionally, a certain amount of creep allowance can be reserved in the sealing structure, allowing the material to tolerate some degree of creep and thereby ensuring its long-term stability and sealing performance. 3. Operating conditions of seals: In practical use, it is necessary to avoid exposure to high temperatures, high pressures, and high stresses over extended periods, in order to reduce the occurrence of creep. Furthermore, certain maintenance measures can be taken, such as replacing seals that have aged or suffered severe creep, in order to ensure the stable operation of the equipment and its sealing performance. In summary, the creep phenomenon of gaskets is an issue that requires attention. To ensure the proper operation of equipment and systems, it is necessary to use materials resistant to creep, design gasket structures appropriately, and take into account factors related to creep behavior in order to reduce or prevent the occurrence of creep.