Hydraulic hose use classification

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Introduction

Hydraulic hoses are classified based on several factors, including their construction, application, pressure rating, and material. Here are the primary classifications used in the industry:

Construction-Based Classification

Reinforcement Type: The construction of hydraulic hoses includes several layers of reinforcement. Common reinforcement types include braided and spiral wire.

Braided Hose: Typically has one or two layers of wire braid.

Spiral Hose: Can have four or six layers of wire spiral, offering higher pressure resistance.

Material: The materials used for the inner tuber, reinforcement, and outer cover can vary.

Inner Tube: Usually made of synthetic rubber or thermoplastic.

Reinforcement: Made of steel wire or textile.

Outer Cover: Typically consists of synthetic rubber or thermoplastic.

Application-Based Classification

General Purpose: Suitable for a wide range of industrial and mobile applications.

High-Pressure: Designed for high-pressure applications such as in heavy machinery and construction equipment.

High-Temperature: Able to withstand high temperatures, often used in engine compartments and near heat sources.

Specialty Applications: Designed for specific uses such as hydraulic jacks, car lifts, and agriculture equipment.

Pressure Rating Classification

Low-Pressure Hoses: Suitable for pressures up to 300 psi.

Medium-Pressure Hoses: Suitable for pressures from 300 to 3000 psi.

High-Pressure Hoses: Suitable for pressures from 3000 to 6000 psi.

Very High-Pressure Hoses: Suitable for pressures above 6000 psi.

Standard-Based Classification

SAE Standards: The Society of Automotive Engineers (SAE) has established standards for hydraulic hoses, such as SAE 100R series.

SAE 100R1, R2: One or two steel wire braids, respectively.

SAE 100R4: Wire inserted suction hose.

SAE 100R12, R13, R15: Spiral wire-reinforced hoses for higher pressure.

Type R12 – Four layers of wire spiral around high temperature medium pressure hose under harsh conditions.
Type R13 – Multi-layer wire spiral for high temperature and high pressure hose under harsh conditions.
Type R15 – Multi-layer wire spiral high temperature ultra-high pressure hose under harsh conditions.

ISO Standards: International Organization for Standardization (ISO) has its own standards like ISO 18752.

ISO 1436, ISO 3862: Standards for rubber and thermoplastic hoses.

EN Standards: European standards such as EN 853, EN 856.

Temperature Rating Classification

Standard Temperature Hoses: Typically operate within -40°C to +100°C.

High-Temperature Hoses: Operate within +100°C to +150°C or higher.

Fluid Compatibility

Oil-Based Fluid Hoses: Designed for hydraulic fluids based on petroleum.

Water-Based Fluid Hoses: Suitable for water-glycol, water-oil emulsions.

Special Fluid Hoses: Compatible with synthetic oils, ester-based fluids, or phosphate esters.

Summary

Understanding the classification of hydraulic hoses is crucial for selecting the right hose for a specific application, ensuring safety, performance, and longevity of the hydraulic system. Always refer to manufacturer specifications and industry standards when choosing hydraulic hoses.

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