液压和气动管线管
精密液压钢管是专为液压传动系统设计的高性能无缝钢管。{0}}具有高精度、高强度、耐高压等特点，广泛应用于液压设备制造和高压流体输送。
Product Info
Steel Tubes for Precision Hydraulic and Pneumatic Pipelines
Precision hydraulic steel tube is a high-performance seamless steel tube designed specifically for hydraulic transmission systems. It has the characteristics of high precision, high strength, and high pressure resistance, and is widely used in the manufacturing of hydraulic equipment and high-pressure fluid transportation. The following is a detailed introduction about precision hydraulic steel tubes:
Product Characteristics
High Precision - Adopting cold drawing processes to ensure high dimensional accuracy, uniform wall thickness, and smooth surface of steel tubes. - Small tolerances for inner and outer diameters, suitable for high-precision hydraulic components. |
High Strength and High Pressure Resistance - Made of high-quality carbon structural steel or alloy structural steel, ensuring that the steel tube has high strength and good pressure resistance. - Suitable for high-pressure hydraulic systems, the working pressure can reach over 30Mpa. |
Excellent Surface Quality - The surface of the steel tube is polished or chrome plated to ensure high surface smoothness, reduce fluid resistance, and extend service life. |
Good Processing Performance - Steel tubes have good weldability and processability, making them easy to manufacture complex components such as hydraulic cylinders and valves. |
Product Size
Tolerances of tubes for precision hydraulic and pneumatic pipelines:
Tolerances of the precision tubes meet the appropriate dimensional standards.
OD tolerance ±0.05mm, ID tolerance ±0.05mm
Tolerances of tubes for precision hydraulic and pneumatic pipelines:
(a) Manufactured length of the tubes is 6000 mm (length tolerances 0 + 50 mm)(b) Exact length is in the range of 3000 – 9000 mm (length tolerances 0 + 10 mm)
Wall thickness: 0.5mm-5mm | Outer diameter: 2.8mm-50mm |
Material Steel Type
EN 10305-4 | E215, E235, E355 |
EN 10 294-2C | St35 |
DIN 1630 | St37.4, St44.4, St52.4 |
ASTM A 822 | A 822. |
Execution Standards
CHINESE STANDARDS | GB/3639 |
EUROPEAN STANDARDS | EN 10305-4, DIN 2391-1, BS 7416, NF a 49-330 |
JAPANESE STANDARDS | JIS JOHS 102 |
AMERICAN STANDARDS | ASTM A 822 |
Main Purpose
Hydraulic Cylinder Used to manufacture the cylinder barrel and piston rod of hydraulic cylinders, ensuring efficient operation of hydraulic systems. |
Hydraulic Valves and Hydraulic Pumps Key components used for manufacturing hydraulic valves, hydraulic pumps, and other hydraulic components. |
High Pressure Oil Circuit and Pipeline System Used in high-pressure oil and pipeline systems of hydraulic equipment to ensure the stability and safety of fluid transportation. |
Construction Machinery Hydraulic systems used for construction machinery such as excavators, cranes, bulldozers, etc. |
Other Fields Widely used in hydraulic equipment in industries such as shipbuilding, aerospace, metallurgy, etc. |
Product Advantages & Quality Control
Product Advantages
1. High precision: High dimensional accuracy, suitable for high-precision hydraulic components.
2. High strength and high pressure resistance: Suitable for high-pressure hydraulic systems, with stable and reliable performance.
3. Excellent surface quality: High surface smoothness, reduced fluid resistance, and extended service life.
4. Good processing performance: Easy to manufacture complex hydraulic components.
Adopting cold drawn precision seamless technology to ensure high dimensional accuracy, smooth surface, and uniform wall thickness of steel tubes. | After heat treatment and surface treatment, the mechanical properties and corrosion resistance of the steel tube are further improved. |
Delivery Status:
Designation | Symbol | Description |
Cold drawn / hard | +C (BK) | After the last cold forming no heat treatment. |
Cold drawn / soft | +LC (BKW) | After the last heat treatment, follows the cold drawing there is a light finishing pass. |
Cold drawn and stress relieved annealed | +SR (BKS) | After the final cold drawing process, the tubes are stress-relieved and annealed in a controlled atmosphere. |
Annealed | +A (GBK) | After the last cold drawing process, the tubes are annealed in a controlled atmosphere. |
Normalized | +N (NBK) | After the last cold drawing process, the tubes are normalized in a controlled atmosphere. |
Quality Control
Strict Testing Chemical composition analysis: Ensure that the material composition meets the standard requirements. Mechanical performance testing: Including tensile testing, impact testing, etc., to ensure that the steel tube has sufficient strength and toughness. Non destructive testing: Using ultrasonic, eddy current, or radiographic testing techniques to detect internal defects in steel tubes. Hydraulic test: Each steel tube undergoes a hydraulic test to ensure good sealing and pressure bearing capacity in high-pressure environments. | Testing Standards Compliant with domestic and international standards such as GB/T 3639, DIN 2391, ASTM A519, etc. Each batch of products comes with detailed quality inspection reports and certificates of conformity. | Certification Guarantee Through ISO/TS16949:2009 quality system certification, ensure stable and reliable product quality. |
