High-temperature hydraulic hose selection guide

High-temperature hydraulic hoses play a vital role in many industrial applications. Whether in aerospace, oil and gas, metallurgy, automobile manufacturing, or heavy machinery, high-temperature hydraulic hoses are used to transmit high-temperature liquids and gases to ensure the efficient operation of equipment. However, to choose a suitable high-temperature hydraulic hose, it is necessary not only to consider the high-temperature resistance of the hose but also to comprehensively evaluate many other factors. This article will discuss in detail the purchase guide for high-temperature hydraulic hoses to help users make scientific and accurate decisions when choosing.

1. Understand the working principle and function of high-temperature hydraulic hoses

high-temperature hydraulic hoses are mainly used to withstand the flow of high-temperature liquids in hydraulic systems. They are generally composed of an inner layer, a reinforcement layer and an outer layer. The inner layer is responsible for bearing fluid pressure, the reinforcement layer provides structural support, and the outer layer is used for protection to prevent damage to the hose from the external environment.

Unlike conventional hydraulic hoses, high-temperature hydraulic hoses need to withstand higher operating temperatures than conventional hydraulic hoses. Therefore, it is crucial to choose the right hose material and structural design. high-temperature hydraulic hoses are commonly used in the following applications:

Transmitting high-temperature liquids: such as hot oil, steam, hot water, and other liquids.

Liquid transmission in high-pressure environments: including hydraulic oil, refrigerants, etc.

High-temperature transmission under special working conditions: such as high-temperature working environments such as metallurgy, electricity, petrochemicals, etc.

2. Key points for selecting high-temperature hydraulic hoses

When purchasing high-temperature hydraulic hoses, multiple factors must be fully considered. Here are some key points:

Working temperature range

The most notable feature of high-temperature hydraulic hoses is their high-temperature resistance. Different hydraulic hoses have different applicable temperature ranges. Usually, the working temperature of high-temperature hydraulic hoses is between -40°C and +150°C, and some special types can reach more than +200°C.

When purchasing, you first need to clarify the working temperature of the system. If the liquid temperature is too high, it is recommended to choose a material with stronger temperature resistance. In addition, the short-term high-temperature tolerance of the hose should also be considered to avoid hose damage due to excessive temperature fluctuations.

Working pressure

The working pressure of high-temperature hydraulic hoses is another factor that cannot be ignored. The pressure of the hydraulic system directly affects the selection of the hose. Excessive pressure can cause the hose to rupture or age. Therefore, when purchasing, be sure to confirm the maximum working pressure of the hose.

The working pressure of the hydraulic hose is usually determined by the structure, material, and reinforcement method of the inner layer of the hose. For working environments that are subject to high temperatures and high pressures, it is recommended to choose high-strength hoses with multiple layers of steel wire braiding or steel wire winding.

Material selection

The high-temperature resistance of high-temperature hydraulic hoses is mainly determined by the material. Common high-temperature hydraulic hose materials are as follows:

Rubber materials: Rubber high-temperature hoses are often used in hydraulic systems with lower temperatures, such as synthetic rubber, fluoro rubber, silicone rubber, etc. These materials have good flexibility and corrosion resistance and are suitable for low to medium and high-temperature environments.

Polyurethane and polyester: Polyurethane and polyester high-temperature hoses perform well at medium and high temperatures, especially for environments with high wear resistance requirements.

Metal materials: Metal hoses (such as stainless steel hoses) may be required in some extremely high-temperature environments. Metal hoses have good high temperature and corrosion resistance and are suitable for high-temperature environments with temperatures exceeding 250°C.

Different materials have different performances in terms of high-temperature resistance, chemical corrosion resistance, flexibility, and mechanical strength. Therefore, when choosing, the selection should be comprehensively considered according to the needs of the actual use environment.

Structural design of the hose

The structural design of the high-temperature hydraulic hose directly affects its performance and service life. Common structures include single-layer braiding, multi-layer braiding and steel wire winding. Multi-layer braided hoses are more stable in high-temperature and high-pressure environments.

Single-layer braided hoses: usually used in low-temperature and low-pressure environments, suitable for hydraulic systems that do not require strong pressure bearing capacity.

Multi-layer braided hoses: braided with multiple layers of steel wire or synthetic fiber, with high-pressure resistance, suitable for working environments with medium temperature and pressure.

Wire wound hoses: used in high-temperature and high-pressure hydraulic systems, with extremely high-pressure resistance, suitable for extremely harsh working environments.

Corrosion resistance of hoses

In some high-temperature hydraulic systems, the fluid may contain corrosive substances (such as chemical solvents, acid and alkali liquids, etc.), and the corrosion resistance of high-temperature hydraulic hoses is particularly important. High-quality high-temperature hydraulic hoses use corrosion-resistant materials to prevent the hoses from being damaged due to liquid corrosion during use.

3. Common application areas of high-temperature hydraulic hoses

Oil and gas industry

The oil and gas industry has extremely demanding requirements for hydraulic hoses, especially in high-temperature, high-pressure, and corrosive environments. high-temperature hydraulic hoses are often used in oil field exploration, mining equipment, oil pipelines, and other occasions.

Metallurgical industry

The metallurgical industry will produce a large amount of high-temperature environment during steelmaking, casting, and other processes, and the hydraulic system needs to withstand high-temperature oil or high-temperature gas. High-temperature hydraulic hoses commonly used in metallurgical equipment can withstand extremely high temperatures and pressures to ensure the smooth operation of the equipment.

Automotive and aerospace

In the automotive and aerospace industries, high-temperature hydraulic hoses are used in hydraulic systems, especially in engines, brake systems, hydraulic lifting systems, and other fields. These hoses not only need to withstand high temperatures but also need to have high mechanical strength and reliability.

Power and heavy machinery

High-temperature hydraulic systems in the power industry and heavy machinery industry also place strict requirements on hoses. High-temperature hydraulic hoses are used in hydraulic machinery, generator sets, and other equipment, and can withstand the transmission of high-temperature liquids to ensure the normal operation of mechanical equipment.

4. How to maintain high-temperature hydraulic hoses

Regularly check the appearance of the hose: Check whether the hose has wear, cracks, discoloration, or swelling, and replace the damaged part in time.

Avoid excessive bending and stretching: Avoid excessive bending and stretching of the hose during installation to avoid affecting the inner and outer layer structure of the hose.

Cleaning and maintenance: Clean the hose regularly to ensure that there are no impurities and corrosive substances remaining to extend the service life of the hose.

Temperature control: Avoid the hose from exceeding its temperature range and ensure that the system operates within a safe temperature.

High-temperature hydraulic hoses are widely used in industrial production, but special attention should be paid to several factors during the purchase and use process. Understanding the working temperature, pressure, material, structure, and corrosion resistance of the hose, and choosing the right hose can ensure the long-term stable operation of the hydraulic system. At the same time, regularly inspect and maintain the hose to avoid failures caused by improper use. I hope this article can provide you with a comprehensive guide to the purchase of high-temperature hydraulic hoses, helping you make more informed decisions when purchasing.

As a leading high-temperature hydraulic hose supplier, we are well aware that choosing the right high-temperature hydraulic hose is crucial in various industrial applications. The high-temperature hydraulic hoses we provide have excellent high-temperature resistance and can withstand the needs of liquid transmission in high-temperature environments. At the same time, we also provide professional technical support and customization services. According to the specific needs of customers, we customize high-temperature hydraulic hoses for you to ensure efficient and safe operation of equipment. By choosing us, you will get not only high-quality products but also considerate after-sales service and comprehensive application support.

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