35MPa high-pressure hose
As an indispensable component in industrial production, 35MPa high-pressure hose is widely used and vital. This article will explore in depth the machines, size range, international and domestic standards, and methods of use and maintenance of 35MPa high-pressure hoses. The following is a reference for relevant hose information provided by Litong Hydraulic Hose Division.
I. Machines for using 35MPa high-pressure hoses
Due to its high strength and high pressure resistance, 35MPa high-pressure hoses are widely used in various machines and equipment that require high-pressure fluid transmission.
1. Automobile industry
In automobile manufacturing, 35MPa high-pressure hoses are mainly used in fuel systems, brake systems, and cooling systems. For example, the high-pressure oil pipe in the fuel injection system needs to withstand the high pressure generated when the engine is working to ensure that the fuel is accurately and efficiently sprayed into the cylinder. The brake oil pipe in the brake system is responsible for transmitting the pressure generated when the driver steps on the brake pedal to the brake caliper to achieve the braking effect.
2. Engineering machinery
In the field of engineering machinery, such as excavators, loaders, rollers, etc., 35MPa high-pressure hoses are used for high-pressure oil pipes and return oil pipes in hydraulic systems. The hydraulic system transmits pressure through high-pressure hoses to drive various actions of engineering machinery, such as lifting, rotation, excavation, etc.
3. Oil extraction and processing
In the process of oil extraction and processing, 35MPa high-pressure hoses are used for oil well drilling, water injection, oil production and transportation of oil products. Due to the complex environment of oil extraction, high-pressure hoses need to withstand high temperature, high pressure and corrosive media, so their quality and performance requirements are extremely high.
4. Metallurgy and chemical industry
In the metallurgical and chemical industries, 35MPa high-pressure hoses are used for the transmission of high temperature, high pressure and corrosive media. For example, in the process of steel smelting, high-pressure hoses are used in the cooling water system and gas transmission system of equipment such as blast furnaces and converters. In chemical production, high-pressure hoses are used to transport various corrosive liquids and gases.
II. Size range of 35MPa high-pressure hoses
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The size range of 35MPa high-pressure hoses is wide to meet the needs of different equipment and systems. Its parameters such as inner diameter, outer diameter and wall thickness can be customized according to specific application scenarios.
1. Inner diameter
The inner diameter is the size of the channel through which the high-pressure hose transmits fluid, which directly affects the flow rate and pressure loss. The inner diameter of a 35MPa high-pressure hose is usually between 4mm and 100mm, depending on the usage scenario and flow requirements.
2. Outer diameter
The outer diameter is the overall size of the high-pressure hose, affecting the installation space and weight. The outer diameter of a 35MPa high-pressure hose varies depending on the inner diameter, wall thickness and material, and is usually between 10mm and 150mm.
3. Wall thickness
Wall thickness is an important parameter for the pressure bearing capacity of a high-pressure hose. The wall thickness of a 35MPa high-pressure hose is usually between 2mm and 10mm, depending on the working pressure, material and service life requirements.
III. International and domestic standards for 35MPa high-pressure hoses
In order to ensure the quality and safety of high-pressure hoses, corresponding standards have been formulated both internationally and domestically.
1. International standards
The International Organization for Standardization (ISO) has developed several standards related to high-pressure hoses, such as ISO 3862-2009 "Rubber and plastic hoses and hose assemblies - Specifications for wire-reinforced high-pressure types". This standard specifies the technical parameters, test methods and requirements of wire-reinforced high-pressure hoses, and makes detailed provisions for the pressure resistance, burst pressure and flexural properties of hoses. In addition, ISO 1402-2009 "Rubber and plastic hoses and hose assemblies - Pressure and vacuum test methods" also specifies the pressure and vacuum test methods for hoses and hose assemblies.
2. Domestic standards
In China, the standards for high-pressure hoses mainly refer to national standards and industry standards. For example, GB/T 3683.1-2018 "Hydraulic delivery hoses - Dimensions, design and categories of hoses and hose assemblies" specifies the dimensions, categories and design requirements of hoses, including parameters such as the inner diameter, outer diameter, wall thickness, maximum working pressure and minimum burst pressure of the hose. GB 10544-2003 "Hydraulic Delivery Hose" stipulates the marking, technical requirements, test methods and inspection rules of high-pressure hoses, which are applicable to high-pressure fluid delivery in the field of hydraulic engineering.
IV. Use and maintenance of 35MPa high-pressure hoses
Proper use and maintenance of 35MPa high-pressure hoses can extend their service life and ensure safe and stable operation of the system.
1. Precautions for use
- Pressure limit: High-pressure hoses should be used within the designed working pressure range and must not exceed their maximum working pressure.
- Temperature control: The temperature of the medium transported by the hose and hose assembly should be controlled between -40°C and 120°C to avoid material aging or performance degradation.
- Bending radius: The specified bending radius should be followed when using, and excessive bending or twisting should be avoided to avoid damage to the internal structure.
- Cleaning and protection: Keep the surface of the hose clean and avoid contamination with oil, dust and corrosive substances. When used in a corrosive environment, a hose with corrosion resistance should be selected and the corrosion should be checked regularly.
- Regular inspection: Check the appearance of the hose regularly to see if there are signs of wear, cracks, blistering, deformation or aging. Check if the hose joints are loose, leaking or damaged.
2. Maintenance methods
- Storage conditions: When not in use, high-pressure hoses should be stored in a dry, ventilated place away from direct sunlight and away from heat sources. Do not stack or twist the hoses at will, and they should be coiled neatly.
- Replacement cycle: Even if there is no obvious damage, replace the hose regularly according to the frequency of use and working environment to ensure safety.
- Use of protective sleeves: When dragging or bending on sharp and rough surfaces, protective sleeves should be used to avoid damaging the hoses.
- Lubrication and maintenance: For threaded joints, apply an appropriate amount of lubricating oil regularly to prevent rust and facilitate disassembly.
- Avoid shock: Avoid applying sudden pressure shocks to the hose to avoid damaging the tube body.
In summary, 35MPa high-pressure hoses play an important role in industrial production. Understanding the machines in which they are used, the size range, international and domestic standards, and the methods of use and maintenance is of great significance to ensure the safe and stable operation of the system. It is hoped that this article can provide valuable reference for practitioners in related fields.
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