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Black Steel Pipe For Hydraulics

DIN 2391 / ST37.4+NBK High Pressure Steel Pipe

Product Description

The DIN 2391 / ST37.4+NBK High Pressure Steel Pipe is a high-quality, precision steel pipe designed for high-pressure applications in hydraulic and pneumatic systems. Manufactured from ST37.4 steel, this pipe is processed using NBK (normalized, bright) treatment, ensuring a smooth and uniform surface finish. It is ideal for use in industries requiring high-pressure fluid transmission and precision performance, such as in machinery, hydraulic systems, and industrial equipment.

Product Advantages

Material
  • Steel Grade:
  • ST37.4
  • Material Properties:
  • ST37.4steel is known for its excellent tensile strength, high yield strength, and weldability, making it suitable for demanding high-pressure applications.
  • The NBKtreatment enhances the surface finish, improving both the mechanical properties and the resistance to corrosion.

International Standards

    1. DIN 2391: Precision steel pipes for hydraulic and pneumatic systems.
    2. EN 10305-1: Steel tubes for hydraulic and pneumatic systems.
EN 10305-4 E235
Dimension

Cold Drawn/Rolled Seamless Precision Steel Tubes Confirming To DIN2391;EN10305-1;EN10305-4

OD Thickness（mm）
mm
6 6*1 6*1.5                  
8 8*1 8*1.5 8*2                
10 10*1 10*1.5 10*2                
12 12*1 12*1.5 12*2 12*2.5              
14 14*1 14*1.5 14*2 14*2.5 14*3            
15 15*1 15*1.5 15*2 15*2.5 15*3            
16 16*1 16*1.5 16*2 16*2.5 16*3            
18   18*1.5 18*2 18*2.5 18*3 18*3.5 18*4        
20   20*1.5 20*2 20*2.5 20*3 20*3.5 20*4        
22   22*1.5 22*2 22*2.5 22*3 22*3.5 22*4        
25     25*2 25*2.5 25*3 25*3.5 25*4        
28     28*2 28*2.5 28*3 28*3.5 28*4        
30     30*2 30*2.5 30*3 30*3.5 30*4 30*4.5 30*5    
32     32*2 32*2.5 32*3 32*3.5 32*4 32*4.5 32*5    
34     34*2 34*2.5 34*3 34*3.5 34*4 34*4.5 34*5 34*6  
35     35*2 35*2.5 35*3 35*3.5 35*4 35*4.5 35*5 35*6  
38     38*2 38*2.5 38*3 38*3.5 38*4 38*4.5 38*5 38*6  
40       40*2.5 40*3 40*3.5 40*4 40*4.5 40*5 40*6  
42       42*2.5 42*3 42*3.5 42*4 42*4.5 42*5 42*6  
45       45*2.5 45*3 45*3.5 45*4 45*4.5 45*5 45*6  
46       46*2.5 46*3 46*3.5 46*4 46*4.5 46*5 46*6  
48       48*2.5 48*3 48*3.5 48*4 48*4.5 48*5 48*6  
50       50*2.5 50*3 50*3.5 50*4 50*4.5 50*5 50*6  
54         54*3 54*3.5 54*4 54*4.5 54*5 54*6  
60         60*3 60*3.5 60*4 60*4.5 60*5 60*6 60*8
Note: 1. We can produce other specification as your requirements.
         2. Surface treatment: Bright, galvanized (yellow, white, colorful), phosphated，army green passivation.
Features
  • High Pressure Resistance: Designed to withstand high internal pressures, making it ideal for use in hydraulic systems and high-pressure fluid transmission.
  • Precision Manufacturing: The pipe is produced using advanced cold-drawing techniques, ensuring excellent dimensional accuracy and smooth surface finish.
  • Bright Surface Finish: The NBKtreatment provides a smooth, bright surface that enhances corrosion resistance and reduces friction in hydraulic systems.
  • Durability: The steel material offers high mechanical strength, making it highly durable and reliable under high-pressure conditions.
  • Weldability: Easy to weld and integrate with other system components for seamless assembly.

 

 

 

 

Specifications
Parameter Details
Standard DIN 2391, EN 10305-1
Steel Grade ST37.4
Surface Finish Normalized, Bright (NBK)
Applications Hydraulic Systems, Pneumatic Systems, Industrial Equipment

 

Dimensional Specifications

Outer Diameter (mm) Wall Thickness (mm) Length (m)
6 – 50 1.0 – 10.0 6.0 (Customizable)
Production Process
  1. Cold Drawing: The pipe is drawn at room temperature to achieve precise dimensions and smooth surfaces.
  2. Normalization (NBK Treatment): The pipe undergoes a normalization process to relieve internal stresses, enhancing mechanical properties.
  3. Bright Surface Finishing: The NBKtreatment results in a bright, smooth surface that enhances corrosion resistance.
  4. Quality Control: Stringent quality checks are performed, including dimensional checks, pressure testing, and non-destructive testing (NDT), to ensure the pipes meet industry standards.

 

Applications

  1. Hydraulic Systems: Used for high-pressure fluid transmission in hydraulic components such as pumps, valves, and actuators.
  2. Pneumatic Systems: Ideal for pneumatic systems requiring high-pressure resistance and precision fluid control.
  3. Industrial Equipment: Suitable for various industrial machinery that requires durable and reliable steel piping for high-pressure operations.
  4. Construction and Mining: Employed in heavy machinery used in construction and mining, where high-pressure hydraulic systems are critical.
  5. Automotive Industry: Used in high-pressure applications within automotive systems, such as braking and power steering.

 

 

Why Choose EN 10305-1 Hydraulic Steel Tube?

  • High Pressure Performance: Designed for high-pressure environments, ensuring reliable fluid transmission under extreme conditions.
  • Precision and Quality: Manufactured with advanced cold-drawing technology for precise dimensions and a smooth, durable surface finish.
  • Enhanced Corrosion Resistance: The NBKtreatment enhances the pipe’s resistance to corrosion, ensuring longer service life.
  • Versatile Applications: Suitable for a wide range of industries, including hydraulics, pneumatics, and industrial equipment.

 

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