EN 856 high-pressure oil hoses
As a key component in hydraulic systems, the performance and quality of high-pressure oil pipes directly affect the stability and safety of the entire system. EN 856 high-pressure oil pipe is a specialized oil pipe designed for high-pressure hydraulic systems in European standards, widely used in engineering machinery, mining equipment, metallurgical machinery and other fields. This article will provide a detailed introduction to the models, structural characteristics, technical parameters, and application scenarios of EN 856 high-pressure oil pipes, helping users better understand and choose high-pressure oil pipes that are suitable for their own needs.
The standard for EN 856 high-pressure oil pipes is developed by the European Committee for Standardization (CEN) and is mainly applicable to hydraulic systems with working pressures between 16MPa and 40MPa. This standard imposes strict requirements on the material, structure, and pressure resistance of oil pipes to ensure their excellent performance even in high-pressure environments. EN 856 high-pressure oil pipes are usually composed of an inner rubber layer, a reinforcement layer, and an outer rubber layer. The reinforcement layer adopts a high-strength steel wire weaving or winding structure, which can withstand extremely high internal pressure. The inner rubber layer is usually made of oil resistant and corrosion-resistant synthetic rubber, such as nitrile rubber (NBR) or hydrogenated nitrile rubber (HNBR), to ensure compatibility with hydraulic oil. The outer adhesive layer has good wear resistance and weather resistance, and can adapt to various harsh working environments
The model of EN 856 high-pressure oil pipe is usually represented by a combination of letters and numbers, such as 4SP, 4SH, etc. Among them, the number represents the diameter of the oil pipe, measured in inches; The letters represent the structural type and pressure rating of the tubing. Taking 4SP as an example, "4" indicates that the diameter of the oil pipe is 1/4 inch, and "SP" indicates that the oil pipe is a four layer steel wire winding structure suitable for high-pressure conditions. Different models of oil pipes have differences in pressure resistance, bending radius, minimum burst pressure, etc. Users need to match them according to actual working conditions and system requirements when selecting. For example, oil pipes of 4SH model usually have higher pressure resistance than 4SP and are suitable for hydraulic systems with higher pressure.
From the technical parameters, EN 856 high-pressure oil pipes have excellent performance. Taking a 1/2-inch diameter oil pipe as an example, its working pressure can reach 40MPa, and the minimum bending radius is about 150mm, which can meet the needs of most high-pressure hydraulic systems. In addition, EN 856 tubing also has good pulse performance and can maintain stable performance under dynamic conditions. According to test data, high-pressure oil pipes that comply with EN 856 standards can typically withstand over 1 million pressure cycles in pulse tests, demonstrating excellent durability. These performance indicators make EN 856 high-pressure oil pipes the preferred product in high-pressure hydraulic systems.
In practical applications, EN 856 high-pressure oil pipes have demonstrated wide applicability. In the field of construction machinery, such as excavators, loaders, and other equipment, EN 856 oil pipes are used for high-pressure oil connections in key parts such as main pumps and hydraulic cylinders. Its excellent pressure resistance and pulse resistance ensure the reliable operation of the equipment under heavy load conditions. In terms of mining equipment, due to the harsh working environment and large pressure fluctuations, the high strength and wear resistance of EN 856 tubing make it an ideal choice. In addition, EN 856 high-pressure oil pipes also play an irreplaceable role in fields such as metallurgical machinery and ship hydraulic systems.
When choosing EN 856 high-pressure oil pipes, users need to pay attention to several aspects. Firstly, the selection of the diameter of the oil pipe should be based on the flow requirements of the hydraulic system to determine the appropriate size. Being too large or too small can affect the efficiency of the system. Secondly, the selection of pressure level must ensure that the rated working pressure of the oil pipe is higher than the maximum working pressure of the system, and leave a certain safety margin. The third is to consider the working environment factors, such as temperature range, whether there is chemical corrosion, etc., and choose the corresponding material of oil pipe. Finally, it is important to pay attention to the certification status of the tubing to ensure that the product complies with EN 856 standards and has passed relevant quality certifications.
When installing and maintaining EN 856 high-pressure oil pipes, some key points also need to be noted. During installation, excessive bending or twisting should be avoided, and the bending radius should not be less than the minimum value specified in the product calibration. The joint connection should ensure reliable sealing to prevent leakage. In daily use, the surface of the oil pipe should be regularly inspected for abnormal conditions such as wear, cracks, or bulges, and any problems should be promptly replaced. In addition, maintaining the cleanliness of hydraulic oil is also an important measure to extend the service life of oil pipes. It is recommended to regularly replace hydraulic oil and filters.
With the development of hydraulic technology and the increase in industrial demand, EN 856 high-pressure oil pipes are constantly innovating and improving. Some manufacturers have launched upgraded products with special performance, such as high-temperature resistant and ultra-high pressure resistant, to meet more stringent working conditions. At the same time, the application of new materials and processes is constantly improving the performance and service life of oil pipes. In the future, EN 856 high-pressure oil pipes will continue to play an important role in the high-pressure hydraulic field, providing reliable fluid transmission solutions for various industrial equipment.
In summary, EN 856 high-pressure oil pipes have become key components in high-pressure hydraulic systems due to their excellent performance and reliable quality. By understanding its model specifications, technical features, and application points, users can better choose and use products that are suitable for their own needs, ensuring the safe and efficient operation of hydraulic systems. Both equipment manufacturers and end-users should pay attention to the selection and maintenance of high-pressure oil pipes, which is of great significance for ensuring equipment performance and extending service life.