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How to choose the right hydraulic hose according to different applications

hydraulic hose system

Intro

What is hydraulic hose and application?

Hydraulic hose is a kind of flexible pipe used to transport liquid, gas or semi-solid material. It consists of inner wall, reinforcement layer and outer sheath, and the inner wall is generally made of synthetic rubber or plastic material. Hydraulic hoses are widely used in hydraulic transmission systems in various machinery, automotive, aerospace, petrochemical, metallurgical and other industrial fields.

Application areas of hydraulic hoses include but are not limited to the following:

  • Industrial field: used in various mechanical equipment and industrial machines for the transmission of various fluid media, such as hydraulic oil, water, gasoline, lubricants, etc.
  • Agricultural field: used in agricultural machinery, sprinkler equipment, plant protection machinery and other hydraulic transmission system, such as tractor hydraulic system, harvester hydraulic system, etc.
  • Aerospace field: used in aircraft, spacecraft and other large equipment for the transmission of hydraulic oil, fuel, liquid oxygen and other media, to withstand high temperature and pressure and complex environment.
  • Petrochemical field: used in petrochemical equipment, oil refining equipment, chemical reactors, storage tanks and other hydraulic transmission systems, to withstand acid, alkali, salt and other corrosive media.

Why is it so important to choose the right hose?

Choosing the right hydraulic hose is very important, because different hydraulic hoses have different pressure-bearing capacity, corrosion resistance, wear resistance, high temperature resistance and other characteristics. If not selected properly, it may lead to hose leakage, rupture, corrosion and other problems, thus affecting the normal operation of equipment and even causing personal property damage. Therefore, when selecting hydraulic hoses, it is necessary to consider factors such as liquid flow, pressure, temperature, medium, bending radius, etc. to ensure that the selected hydraulic hoses meet the actual needs.

Operating pressure and temperature range

What is the working pressure and temperature range?

Hydraulic hoses are a type of pipe used to transmit fluid pressure, so there are two main factors to consider when choosing the right hydraulic hose: working pressure and temperature range.

Working pressure is the maximum pressure that a hydraulic hose can withstand in a hydraulic system. When the liquid in the hydraulic system flows through the hydraulic hose, the hydraulic hose needs to withstand a certain amount of pressure. If the pressure of the selected hydraulic hose is less than the maximum pressure in the system, it will cause the hose to rupture, which will lead to the hydraulic system not working properly. Therefore, when selecting hydraulic hoses, it is important to ensure that the pressure of the selected tube is greater than or equal to the maximum working pressure of the hydraulic system.

Temperature range refers to the temperature range that the hydraulic hose can withstand. When a hydraulic system is in operation, the internal temperature of the pipe increases due to heat generation. If the selected hydraulic hose cannot withstand this high temperature, it will lead to aging, softening or deformation of the pipe, which will reduce the efficiency of the hydraulic system and even lead to failure. Therefore, when selecting hydraulic hoses, you need to ensure that the selected hoses can withstand the maximum temperature in the hydraulic system, and also take into account the possible low temperature environment in the hydraulic system to ensure that the selected hoses can also work properly at low temperatures.

Working pressure and temperature requirements for different applications

The working pressure and temperature range requirements for hydraulic hoses vary depending on the application. The following are a few common applications and the corresponding working pressure and temperature range requirements:

  • Industrial: In the industrial sector, hydraulic systems are typically subjected to high working pressures, usually in the range of 200-400 bar. The temperature range of hydraulic hoses is usually required to be between -40°C and +120°C.
  • Agriculture and construction: In agriculture and construction, hydraulic systems are typically subjected to high working pressures, usually in the range of 150-250 bar. The temperature range of hydraulic hoses is usually required to be between -40°C and +100°C.
  • Aviation and Aerospace: In aviation and aerospace, hydraulic systems are typically subjected to high working pressures, typically in the range of 3000-5000 psi. The temperature range required for hydraulic hoses is typically between -65°C and +275°C.
  • Automotive and transportation: In automotive and transportation applications, hydraulic systems are typically subjected to high working pressures, typically in the range of 100-200 bar. The temperature range required for hydraulic hoses is usually between -40°C and +120°C.

It is important to note that the operating pressure and temperature range requirements of hydraulic hoses can vary depending on the particular application or the specific equipment. Therefore, when selecting a hydraulic hose, it is important to understand the requirements of the specific application and equipment and to select a hose that meets the requirements.

Recommendations from practice

  • Determine the working pressure: When selecting a hydraulic hose, you need to determine the maximum working pressure of the hydraulic system. The hose should be selected to withstand a pressure at least 20% higher than the maximum working pressure in the hydraulic system.
  • Determine the temperature range: When selecting a hydraulic hose, determine the maximum and minimum temperatures in the hydraulic system. The selected hose should be able to withstand the maximum and minimum temperatures in the hydraulic system.
  • Determine the inner diameter of the hose: When selecting a hydraulic hose, you need to determine the size of the inner diameter required. The inner diameter of the hose should be large enough to ensure that the fluid can flow freely and not cause a pressure drop.
  • Determine the hose material: Different hydraulic applications require different materials. In general, hydraulic hose materials can be divided into three categories: synthetic rubber, fluoroelastomer and polyester. Different materials have different resistance too high and low temperatures and chemical properties. Choosing the right material can improve the durability and performance of the hose.
  • Select hoses that meet standards: Hydraulic hoses should meet the appropriate standards and specifications, such as ISO, SAE and EN standards. These standards specify the size, pressure rating, temperature range and material requirements of hydraulic hoses. Choosing hoses that meet the standards ensures that they meet the appropriate safety and performance requirements.

Wear resistance and corrosion resistance

The importance of hose wear resistance and corrosion resistance

Hydraulic hose needs to have good wear resistance and corrosion resistance is one of the important factors to ensure the long-term safe operation of the hydraulic system.

Wear resistance is the hose can resist damage caused by friction and abrasion in the long-term use process. In the hydraulic system, due to the high pressure and high-speed flow of the hydraulic medium, the outer surface of the hose is susceptible to wear and spalling. If the hose wear resistance is not enough, there will be hose leakage, bursting and other problems, which can seriously lead to hydraulic system failure, resulting in equipment downtime and safety accidents.

Corrosion resistance refers to the hose can be used in the hydraulic medium for a long time without corrosion. In the hydraulic system, because the hydraulic medium contains acids, alkalis, salts and other chemical substances, if the hose material is not corrosion-resistant, it will lead to corrosion of the inner wall of the hose, oxidation, and even lead to hose rupture. In addition, there may be corrosive gases or liquids in the hydraulic system, these substances will also cause damage to the hose.

Therefore, the hydraulic hose needs to have good wear resistance and corrosion resistance to ensure the long-term safe operation of the hydraulic system. In the selection of hydraulic hose, according to the specific requirements of the hydraulic system, you need to choose the hose material with good wear resistance and corrosion resistance, and regularly check the wear and corrosion of the hose, and replace and maintain the hose in a timely manner.

Wear and corrosion problems that can occur in different applications

  • Industrial machinery field: hydraulic systems are used in machine tools, molds, lifting equipment and other mechanical equipment. In machine tools, the hoses are susceptible to wear and tear because the hydraulic system requires high-frequency round-trip movements; and in lifting equipment, the hoses are susceptible to corrosion because the hydraulic system works under harsh working conditions for a long time.
  • Agricultural machinery field: hydraulic systems are used in tractors, combine harvesters, irrigation equipment and other agricultural machinery. In these equipment, the hydraulic system needs to work for a long time in the open air environment, vulnerable to the wind and rain, sun exposure and other natural factors, so that the hose surface wear and corrosion.
  • Construction engineering field: hydraulic systems are used in concrete pumps, excavators, cranes and other construction equipment. In the construction site, the hydraulic system often needs to work in sand and gravel accumulation, mud environment, vulnerable to wear and corrosion.
  • Marine industry field: hydraulic systems are used for ship propulsion, lifting and loading equipment. In the marine environment, hydraulic systems need to be exposed to seawater for a long time and are susceptible to the corrosive effects of salt spray.

In summary, different applications in the hydraulic system may be affected by different wear and corrosion problems. In the selection of hydraulic hoses, according to the characteristics of different application areas, you need to choose the hose material with better wear resistance and corrosion resistance, and regularly check the wear and corrosion of the hose, timely replacement and maintenance of the hose.

Selection tips:

  • According to the pressure level selection: hydraulic hose pressure resistance is a very important indicator. According to the working pressure level of the hydraulic system, choose the hose that meets the required pressure resistance level.
  • Select according to the diameter: the larger the inner diameter of the hydraulic hose, the greater the pressure resistance, the greater the flow. According to the flow requirements of the hydraulic system, choose the appropriate inner diameter.
  • Choose according to the joint type: hydraulic hose has different types of joints such as female thread, male thread, flange and inserted type. According to the connection requirements of the hydraulic system, choose the right type of joint.
  • Select according to the temperature requirements: The material and structure of hydraulic hose have certain restrictions on temperature. According to the operating temperature range of the hydraulic system, choose the appropriate hose material and structure.
  • Select according to the ability to resist twisting: hydraulic hose in the process of operation, often twisted due to the force. Select the hose with better twist resistance can effectively prevent hose damage.
  • According to wear resistance and corrosion resistance selection: as mentioned before, hydraulic systems in different applications may be affected by different wear and corrosion problems, choose wear resistance and corrosion resistance of the hose material can effectively extend the service life of the hose.

In summary, the choice of hydraulic hose needs to consider a number of factors, according to the actual situation of the hydraulic system, choose the appropriate hydraulic hose material and specifications, can ensure the normal operation of the hydraulic system and extend the service life of the hydraulic system.

Size and length

Size and length concepts

Hose size usually refers to the hose inside diameter, outside diameter and wall thickness and other dimensional parameters. Hose inner diameter and outer diameter is the most basic dimensional parameters of the hose, directly related to the hose pressure resistance and flow size. Hose wall thickness is the distance between the inner diameter and outer diameter of the hose, is also an important indicator of the hose wear resistance and corrosion resistance.

Hose length refers to the actual length of the hose. In the hydraulic system, the hose length needs to be selected according to the actual needs, too short hose will affect the connection and operation of the hydraulic system, while too long hose will affect the flow and pressure of the hydraulic system. In the selection of hose length, should be based on the layout of the hydraulic system and the actual use of the situation, select the appropriate length to avoid the hose is too long or too short.

It should be noted that the size and length of the hose are very important indicators, different hose size and length for different hydraulic systems and application scenarios. Therefore, in the selection of hydraulic hose, you need to consider the size and length of the hose and other parameters to ensure the normal operation and stability of the hydraulic system.

How to choose the right size and length to suit specific needs in different applications

  • Determine the maximum pressure and flow rate of the hydraulic system: According to the design and working requirements of the hydraulic system, determine the maximum pressure and flow rate. According to the operating pressure and flow rate of the hydraulic system, the appropriate hose size and length can be selected to ensure the safe operation and flow output of the system.
  • Consider the radius of curvature of the hose: the radius of curvature of the hose is an inherent characteristic of the hose, affecting the wear resistance and twisting ability of the hose. In the selection of hose length and size, you need to select the appropriate hose length and size according to the hose radius of curvature and the limitations of the radius of curvature.
  • Determine the application scenario of the hose: the application scenario of the hose will affect the size and length of the hose selection, different application scenarios require different hose size and length. For example, in high temperature or low temperature environment, the hose material and size need to have corresponding adjustment to ensure the performance and life of the hose.
  • Consider the hose connection: hose connection will also affect the length and size of the hose selection. Different hose connection methods need different hose length and size. For example, the hose connection mode for the flange connection, you need to choose the appropriate hose length and size to meet the requirements of the flange connection.

In general, the selection of the appropriate hose size and length need to take into account the actual needs of the hydraulic system and application scenarios, and combined with the characteristics of the hose and connection methods and other factors to ensure the normal operation and stability of the hydraulic system. If you are not sure how to choose the right hose size and length, you can consult with a professional hydraulic manufacturer near you or contact us.

The importance of size and length

The size and length of the hydraulic hose is critical to the performance stability and reliability of the hydraulic system. The choice of inappropriate hose size and length may lead to the hose can not withstand the high pressure and high flow rate in the system, resulting in hose rupture, leakage and other problems, seriously affecting the performance and safety of the hydraulic system.

If the hose size is too small, it will lead to insufficient system flow, affecting the efficiency of work. If the hose length is too short, it will lead to unstable connection of the system and affect the reliability of the system. If the hose size is too large or length is too long, it will lead to increased pressure loss of the system, affecting the energy efficiency and stability of the system.

Therefore, when selecting the size and length of the hydraulic hose, the working requirements and application scenarios of the hydraulic system must be considered, combined with the characteristics of the hose and the connection method and other factors for comprehensive consideration. Only by selecting the appropriate hose size and length can we ensure the performance stability and reliability of the hydraulic system.

Connection method and fittings type

Different types of connections and fittings types

There are various types of hydraulic hose connections and joints, the common ones are threaded connections, flange connections, quick couplings, etc.. The following is a brief description of the characteristics of these connection methods and joint types.

  • Threaded connection

Threaded connection is one of the most common ways to connect hydraulic hoses. It uses threaded joints and hose sleeve joints of the thread to tighten each other to achieve connection. Threaded connections are suitable for small hydraulic systems and are easy to connect, but attention needs to be paid to matching the thread type and size to ensure that the connection is strong and sealed.

  • Flange connection

Flange connection is a more reliable way to fix the hydraulic hose connection. It uses flange fittings and flange sleeve fittings to connect with each other, and the connection is fixed by bolts and nuts. Flange connection is suitable for large hydraulic systems and has the advantages of firmness, sealing and easy disassembly. However, it should be noted that flange connection requires the use of special flange joints and flange sleeve joints, which are more expensive and require special tools for disassembly.

  • Quick coupling

Quick coupling is a type of hydraulic hose connection for quick connection and disassembly, which is suitable for applications requiring frequent disassembly, such as mobile equipment and agricultural machinery. It uses quick coupling and quick coupling seat to connect with each other, and the two are fixed by a quick release nut. Quick coupling has the advantages of easy operation, quick connection and good sealing, but attention needs to be paid to the selection of reliable quality quick coupling to avoid problems such as oil leakage and dislodgement.

In short, when choosing the hydraulic hose connection and coupling type, it is necessary to consider the solidity, sealing, reliability, easy disassembly and assembly of the connection according to the application and system requirements to ensure the performance and safety of the hydraulic system.

Suitable connection methods and fittings types for different applications

The selection of hydraulic hose connection and coupling type needs to be based on the application area and use environment of the hydraulic system. The following is a brief description of the suitable connection methods and fitting types for different application areas:

  • Industrial automation and machine building

In the field of industrial automation and mechanical engineering, flange connections and threaded connections are commonly used. For small hydraulic systems, threaded connections are one of the most commonly used connections, while for large hydraulic systems, flange connections are usually used because they offer the advantages of a more reliable, robust and hermetically sealed fixing method.

  • Agricultural and construction machinery

In agriculture and construction machinery, hydraulic hoses often need to be changed frequently, so the use of quick couplings is a more common choice. Quick couplings have the advantages of quick connection, easy operation and good sealing, and are suitable for applications that require frequent hose replacement.

  • Aerospace and military

In the aerospace and military fields, the connection requirements for hydraulic systems are high, requiring the use of high strength, high pressure and high durability connection methods and coupling types. This time, often using threaded connections and flange connections, as well as high-strength and corrosion-resistant joint materials, such as stainless steel and titanium alloy.

In short, the selection of hydraulic hose connection methods and joint types need to take into account factors such as application areas, system requirements, use of the environment and economic benefits, and take into account factors such as the solidity of the connection, sealing, reliability, easy disassembly and assembly to ensure the performance and safety of the hydraulic system.

Some practical experience

Choosing the right type of hydraulic hose connection and coupling is an important factor in ensuring the safety and reliability of your hydraulic system. The following are some recommendations for selecting hydraulic hose connections and fitting types:

  • Determine the system requirements

Before selecting the connection method and fitting type, you need to understand the requirements of the hydraulic system. For example, the required system pressure, flow rate, temperature range, etc. These factors will have an impact on the choice of connection method and fitting type.

  • Selecting high quality fittings

The quality of the coupling material for hydraulic hoses has a critical impact on the safety and reliability of the system. Therefore, choosing high-quality fitting materials, such as steel, stainless steel and titanium alloy, can improve the safety and reliability of the system.

  • Choose the right connection method

Different connection methods have different effects on the performance and safety of the system. For example, flanged connections provide a high degree of robustness and sealing for high pressure and high flow systems, while threaded connections are suitable for small hydraulic systems. Therefore, choosing the right connection is critical to the performance and safety of the system.

  • Make sure the connection is intact

When connecting hydraulic hoses, you need to make sure that the connections are intact. Check the surface of the hose ends and fittings for flatness, damaged threads, cracks, etc. If problems are found, they should be replaced immediately.

  • Perform regular inspection and maintenance

The type of connections and fittings of the hydraulic system also need to be inspected and maintained regularly. Check the surfaces of hoses and fittings for damage, cracks or oxidation, and for problems such as leaks. Finding and fixing problems in a timely manner can improve the safety and reliability of the system.

In conclusion, when selecting the hydraulic hose connection method and joint type, the requirements of the hydraulic system, the quality of the joint material, the connection method, intactness, regular inspection and maintenance, and other factors need to be taken into account and operated in strict accordance with relevant standards and regulations to ensure the safety and reliability of the hydraulic system.

Conclusion

Choosing the right hydraulic hose is critical to the stability and reliability of the system. When selecting hydraulic hoses, factors such as operating pressure, temperature range, wear resistance and corrosion resistance needs of the application area need to be considered. In order to meet these requirements, you can choose a good material, certified hydraulic hose. The correct hose size and length are also important and should be selected according to system requirements. Connection methods and fitting types also need to be chosen carefully to ensure the safety and reliability of the system. Ultimately, when selecting hydraulic hoses, thorough consideration should be given, not only to cost and availability, but also to long-term system reliability and maintenance costs.

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