Steel wire rubber hoses are consumables. Even if they appear intact, the rubber material will gradually age over time and under certain usage conditions, resulting in a significant decline in performance after reaching their service life. Establishing scientific replacement criteria is a fundamental requirement for preventative maintenance.
I. Factors Affecting Service Life
For every 10°C increase in temperature, the aging rate of rubber approximately doubles, and high-temperature environments shorten service life. The more severe and frequent the pressure shocks, the faster the steel wire fatigues. Chemical corrosion of the rubber by the medium also directly affects service life. Stress caused by improper installation will significantly accelerate failure.
II. Situations Requiring Immediate Replacement
Any form of bulging appears in the hose; the outer rubber layer cracks, exposing the steel wire reinforcement layer; severe leakage at the joints that cannot be repaired; localized hardening or softening of the hose; swelling of the inner wall leading to a significant reduction in the pipe diameter.
III. Situations Recommending Planned Replacement
Reaching 2-3 years of service life; the hardness value increasing by more than 15 points from the initial value; a previous failure caused by pressure shock has occurred; significant changes have occurred in the transported medium or operating conditions.
IV. Replacement Cycle Recommendations
For construction machinery, the main hydraulic system is recommended to be replaced every 2-3 years; for mining equipment, 1-2 years; and for general industrial equipment, 3-5 years. Hose that have reached their service life, even if they appear intact, should be sent for inspection to confirm their performance before continued use.
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