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Hose Protection
Date: 27-02-2023
It’s pretty common for hydraulic hose assemblies to operate in harsh environmental conditions. Farms, and mine sites – they’re not exactly dust, heat, or rain-free environments. Plus you have things like grinding sparks and weld spatter, as well as machine vibration
All of this can erode hose covers, expose the reinforcement to dirt and moisture, and lead to failure. Therefore, it’s important to protect hydraulic hoses against abrasion, physical impact, crushing loads, and high temperatures to ensure long, reliable operation.
You can protect a hose by:
- Shielding: creates a physical barrier and is usually used to protect a small section. This could be as simple as a sheet-metal guard, or plastic barrier.
- Spring guards: are wound steel springs typically zinc-plated for corrosion resistance that slides over the hose.
- Open/closed coil guard: They fit over the hose but do not run the entire hose length but only extend from the coupling for about 10 to 12 inches. Spring coils that run about half the length are closed—each wire coil abuts the next— for firm support and attachment near the fitting. The remainder has open, spaced coils typical of conventional spring guards, for strain relief. The device acts as a bend restrictor and helps prevent the hose from excessive bending and kinking adjacent to the coupling.
- Protective sleeving: Protective sleeves are textile tubes that slide over a hose. They’re made of materials like woven nylon or polyester and provide excellent resistance to external abrasion and UV radiation. The construction often offers a smooth interior wall that lets the hose move freely inside the sleeve and prevents internal abrasion.
- Protective wrap: This is similar to a protective sleeve, but designed to attach to assemblies already installed. The abrasion-resistant fabric material comes flat and includes a Velcro-type closure.
- Plastic spiral guards: Flat, spiral-shaped plastic guards, that wrap around a hose and, can be secured without removing an assembly from a machine if required. These are made from heavy-duty polyethylene, providing an economic and easy-to-install way to protect hoses.
- Fire sleeve: This is a heat and flame-resistant, flexible insulating cover that slides over a hose and clamps to the fittings. It is typically made of woven fiberglass or materials like high-temperature silicone. Different manufacturers will have different ratings.
- Point-of-contact sleeve: Cover only short lengths that withstand abrasive wear, rather than covering the whole assembly. They are typically made with materials like PVC and attach with cable ties.
- Abrasion resistance hose covers: For the most demanding applications, built-in abrasion-resistant hose covers provide the highest levels of protection. These are suited to tight spaces, assemblies that need lightweight protection, or that need the most robust protection.
The hose protection you should choose is based on the specific needs of the equipment and how much friction the hose assemblies will encounter.