Characteristics and Applications of Large-Diameter High-Pressure Rubber Hoses

　　Characteristics and Applications of Large-Diameter High-Pressure Rubber Hoses

　　 Large-diameter high-pressure hose It features a thickened inner rubber layer made of a specialized synthetic rubber, offering excellent wear resistance, tight outer diameter tolerances, superior water resistance, and a flexible, durable hose body. The hose can withstand a burst pressure up to four times its working pressure.

　　Transport medium: dredgers, dredging vessels, suction dredgers, desilting vessels, seawater.

　　Operating temperature: -20℃ to 30℃.

　　Structure of large-diameter high-pressure hoses: Large-diameter hoses consist of a thickened, wear-resistant rubber inner liner; multiple layers of fabric or cord‑reinforced plies that enhance tensile strength; a helical steel‑wire reinforcement layer serving as the skeletal structure; an intermediate rubber layer; and an outer rubber layer that provides excellent wear resistance and weatherability.

　　Use Large-diameter high-pressure hose : Large-diameter high-pressure hoses are used for dredging slurry and mortar operations, and can also be employed in port and wharf maintenance, river dredging, urban drainage, and other applications. They are suitable for conveying materials such as cement slurry, mortar, water, toner, concrete powder, and mineral powders at ambient temperatures.

　　Hydraulic hose rupture due to excessive pressure.

　　Symptoms: The hose ruptured, with a short duration and multiple burst points. The explosion site was very clean, with no scattered metal wire fragments and no evidence of wire abrasion or outer rubber layer wear.

　　Cause: Excessive working pressure, or exceeding the lower burst pressure.

　　Solution: Adjust the operating pressure of the control system, or replace the hose with one rated for higher pressure.

　　Hydraulic hose aging

　　1. Symptoms: The hose’s rubber layer exhibits numerous fine cracks, yet it remains elastic. However, in… Large-diameter high-pressure hose No cracks were found at the buckle of the joint.

　　2. Cause: Dry internal air. This may be due to the use of a non-lubricated air compressor or a cooled air‑drying system.

　　3. Solution: Replace the hose with one specifically designed for extremely dry air.

　　Hydraulic hose hardening

　　1. Symptoms: At room temperature, the hose becomes hard and brittle, cracking when bent. Even after the component is removed from its original assembly position, it retains its installed shape. Visually, the outer rubber layer appears extremely dry and carbonized.

　　2. Cause: The hose is exposed to an overheated environment. Plasticizers in the rubber compound impart flexibility to the hose, but heat can promote the leaching of these plasticizers. Air‑containing oil can oxidize the inner rubber layer, leading to hardening of the hose and compromising system performance. Any combination of oxidation and heat accelerates the hardening of the inner rubber layer. Cavitation can also produce similar effects. Moreover, aged hoses often exhibit many of these same issues.

　　3. Solution: Inspect the application and reduce the temperature to within the hose’s allowable operating range. Alternatively, select a high‑temperature‑rated hose. Install thermal insulation sleeves or baffles. Replace the hose assembly.

　　 Large-diameter high-pressure hose External wear

　　1. Symptoms: The hose liner is torn or damaged. The wire braid is damaged, broken, or corroded.

　　2. Causes: excessive wear, friction between the hose and adjacent components or other hoses, or the use of hose clamps that are not properly sized. The hose may also collide with sharp corners or protruding objects.

　　3. Solution: Replace the system hoses and assemblies. Use wear‑resistant protective sleeves or a spring‑loaded sleeve. Re‑route the hoses and secure the connections with hose clamps to avoid interference with other components.