Lubrication Grease Hose does not have a unified fixed service life. Its service cycle is affected by multiple factors including hose material, working temperature, working pressure, medium compatibility, bending and vibration frequency and environmental conditions. Theoretical service life is only for reference. Actual on-site working conditions often shorten service life significantly. Service life shall not be determined simply by fixed years, and comprehensive judgment shall be combined with regular visual inspection.
Different base materials have great differences in inherent service life. Mainstream Lubrication Grease Hose products on the market fall into three categories: rubber hoses, polyurethane hoses and thermoplastic plastic hoses. High-quality oil-resistant rubber hoses have a theoretical service life of about 1 to 3 years under ideal working conditions, namely normal temperature, stable pressure, matched medium, slight vibration and few bending movements. Polyurethane hoses have good wear resistance but obvious defects in medium compatibility. If matched with oil products, their service life under low-pressure and normal temperature conditions is close to rubber hoses. However, they will swell and be damaged within a few months once exposed to incompatible synthetic lubricating oil. Thermoplastic plastic hoses have good chemical stability but weak vibration and bending resistance, suitable for fixed pipelines without vibration, with a service cycle of around 2 years under ideal conditions.
Working conditions are the core factor affecting service life. The first factor is temperature. Temperature exerts an obvious influence on the aging rate of polymer hoses. The aging rate multiplies when the temperature of environment and medium rises. If hoses work near the upper temperature limit of materials for a long time, their service life will be reduced by half or even more. High temperature accelerates loss of plasticizers inside hose materials, hardens and embrittles pipe walls, and promotes oxidation of lubricating oil to generate corrosive substances eroding pipe walls. Low temperature also brings adverse effects. Hose materials lose flexibility under low temperature and are prone to cracks under vibration and impact.
The second factor is working pressure and pressure impact. Hoses with sufficient rated pressure margin and stable operation have longer service life. If hoses work near the rated pressure for a long time or the system suffers from frequent pulse pressure fluctuation, the pipe wall bears alternating stress repeatedly. Fatigue damage gradually forms inside the pipe wall and micro-cracks develop, greatly reducing service life. Pressure impact is the main cause of premature failure of many hoses. Many pipelines maintain stable static pressure but break quickly under continuous pressure impact.
The third factor is medium compatibility. If the hose material is incompatible with the conveyed lubricating oil, oil molecules penetrate into the pipe wall and cause swelling, softening and material degradation. In such cases, hose service life drops sharply. In some scenarios, bulging and leakage occur within dozens of days. Many purchasers only pay attention to pressure and size while ignoring medium compatibility, resulting in service life far below expectations.
To sum up, the service life of Lubrication Grease Hose is determined by multiple conditions. Select products with matched medium, temperature and pressure during model selection, optimize installation to reduce stress and friction, control system pressure stably, inspect pipe conditions regularly and make comprehensive assessment. Do not judge hose availability merely by fixed service life, so as to prevent sudden hose failure and oil leakage and ensure continuous and stable operation of the lubrication system.