During long-term use, the one-piece sleeve of the 87311 Flanged hose coupling may gradually decrease due to material fatigue. The one-piece sleeve is usually made of metal materials. Under long-term working conditions of high pressure, high-frequency pulses or vibrations, microscopic changes will occur inside the metal material. As time goes by, these microscopic changes continue to accumulate and may eventually cause metal fatigue cracks. These cracks may be very subtle and difficult to detect at first, but they will gradually expand as the working cycle increases. Once the cracks expand to a certain extent, they will seriously affect the structural strength of the sleeve, resulting in it being unable to effectively enhance the reliability of the connection.
Wear and corrosion are also important reasons for the reduced reliability of the one-piece sleeve of the 87311 Flanged hose coupling after long-term use. During frequent connection and disconnection operations, the contact surface of the sleeve and the hose or flange will continue to move relative to each other, resulting in wear. This wear will increase the roughness of the contact surface and gradually increase the fit clearance, thereby affecting the tightness of the connection. At the same time, if the joint works in a corrosive medium, the surface of the sleeve will be corroded by chemicals. Corrosion will destroy the protective film on the metal surface, causing the metal material to gradually dissolve or undergo electrochemical reactions, resulting in reduced strength and durability of the sleeve, and weakening its ability to enhance connection reliability.
Long-term vibration and impact have a significant impact on the reliability of the 87311 Flanged hose coupling integrated sleeve. During the operation of the equipment, the sleeve will continue to be subjected to vibration. This vibration may cause the connection between the sleeve and the hose or flange to gradually loosen, destroying the originally tight fit. As time goes by, the degree of loosening continues to increase, and may even cause damage to the thread or clamp. In addition, under high pressure and high flow rate conditions, the fluid will exert an impact force on the sleeve. This impact force may cause the sleeve to deform, change its original shape and size, thereby affecting its fit accuracy with the hose or flange and reducing the reliability of the connection.
In a high temperature environment, the properties of metal materials will change. High temperature will accelerate the aging process of the material, cause the metal grains to grow, and change the organizational structure, resulting in reduced strength and toughness of the material. At the same time, high temperature may also cause thermal expansion of the sleeve. If the expansion is uneven, stress will be generated inside the sleeve, further accelerating fatigue damage. In a low temperature environment, metal materials will become brittle and their impact resistance will be significantly reduced. When subjected to external forces, the sleeve is more likely to fracture brittlely, and thus cannot play its role in enhancing connection reliability.
