Hydraulic transmission equipment in construction, mining, metallurgy and automated workshops operates under comprehensive interference factors such as high pressure, frequent pressure pulses, oil erosion and outdoor wind and sunlight exposure. Ordinary rubber hoses are prone to inner tube swelling caused by oil soaking, outer layer aging cracking under outdoor ultraviolet radiation, and pipe expansion rupture under high instantaneous pressure. The anti-aging NBR EPDM oil conveying hose covers DN10 to DN90 calibers and 2000–7000 PSI working pressure. Equipped with steel wire spiral reinforcement and CR weather-resistant outer cover, this hose solves composite damage problems induced by oil, high pressure and harsh climate, meeting long-term stable oil transportation needs of indoor and outdoor industrial equipment.

The inner conveying layer adopts blended NBR and EPDM composite rubber formula, combining the strengths of two types of rubber materials. NBR features excellent resistance to hydraulic oil, lubricating oil, fuel oil and various industrial greases. It avoids swelling, dissolution and permanent deformation after long-time contact with oil media and keeps inner walls smooth to guarantee stable flow efficiency. EPDM supplements outstanding ozone resistance, heat resistance and aging resistance, improving the tolerance of the inner tube to temperature cycling and workshop hot environments. The blended material balances medium compatibility and thermal stability, slowing material degradation under long-cycle oil circulation and temperature fluctuation, and reducing pipeline failure probability caused by inner tube aging damage.

The outermost layer is made of CR chloroprene rubber specially formulated for outdoor working conditions. Compared with ordinary rubber, CR cover has strong ultraviolet resistance, ozone resistance and anti-weathering capability. It effectively prevents outer rubber hardening, cracking and pulverization under long-term outdoor sunlight irradiation, rain erosion and air oxidation. Meanwhile, CR material adds wear-resistant properties, resisting scratches and friction damage from metal brackets, gravel and equipment edges during installation and operation. Even under alternating outdoor hot and cold weather, the outer protective layer maintains stable physical properties, forming reliable external defense for the entire pipeline structure.

Multi-layer staggered steel wire spiral winding serves as the pressure-bearing framework between inner composite rubber and CR outer cover. The spiral steel wire structure boasts powerful radial constraint capacity, adapting to wide pressure grading from 2000 PSI up to 7000 PSI. 2000–3500 PSI specifications match medium-load machinery such as forklifts, printing equipment and conventional machine tools for stable oil circulation. 4000–5500 PSI models fit medium-heavy load equipment including road rollers, injection molding machines and medium excavators to cope with regular pressure impact. 6000–7000 PSI heavy-duty grades apply to mining machinery, large hydraulic presses and heavy construction equipment, resisting extreme instantaneous high pressure. All DN10-DN90 sizes can be matched with different pressure grades freely.

High-temperature vulcanization tightly bonds spiral steel wire with inner and outer rubber layers, preventing interlayer peeling under repeated pressure pulses and thermal expansion and contraction.

The standardized caliber range of DN10 to DN90 forms classified matching for different flow demands and installation spaces. Small calibers DN10, DN12, DN16 are used for precision control oil circuits, instrument pipelines and narrow gaps inside compact equipment. The pipe body retains good flexibility for complex bending wiring. Medium calibers DN20 to DN65 are mainstream sizes for most industrial hydraulic loops, balancing flow rate and layout convenience for factory hydraulic stations and mobile mechanical pipelines. Large calibers DN80, DN90 are configured for large-flow main oil pipelines of centralized hydraulic systems and heavy machinery, lowering fluid resistance for large-volume oil delivery. All calibers follow unified composite molding standards for consistent structural reliability.

This multi-composition oil hose adapts to both indoor closed workshops and open-air construction sites. The flexible pipe body can bend around valves, equipment supports and pipe frames without dead bending blocking flow channels, and compensates assembly deviation of hard pipelines. All sizes are compatible with common hydraulic joints, pipe clamps and flanges, supporting field cutting according to actual measured lengths. Before delivery, all finished products pass hydrostatic burst test, cyclic pulse test, oil soaking aging test and weathering simulation test to confirm stable performance within rated pressure. The anti-aging triple-layer structure greatly extends maintenance cycles for equipment running all year round.