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hydraulic tube, seamless hydraulic tube, hydraulic tube inner diameter
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Inner Diameter Calculation of Hydraulic Tubes

Date:2025-06-11View:65Tags:hydraulic tube, seamless hydraulic tube, hydraulic tube inner diameter

Hydraulic Tubes

Hydraulic tubes are tubes used to transmit pressure, usually used in hydraulic and hydraulic systems. As an important pressure transmission component, hydraulic tubes often use seamless steel pipe structures to ensure their safety and reliability in high-pressure working environments. Hydraulic tubes have the advantages of high strength, corrosion resistance, and wear resistance, so they are widely used in mechanical engineering, automotive industry, petroleum mining, metallurgical industry and other fields.


Hydraulic tube inner diameter calculation formula

The calculation formula for the inner diameter of hydraulic tubes is as follows:


Pipe inner diameter = 2×flow rate ÷ (π×flow velocity)


Among them, flow rate refers to the liquid flow through the pipe in the hydraulic system, in cubic meters per second; flow velocity refers to the average flow velocity of the liquid when it passes through the pipe, in meters per second.


Calculation steps for hydraulic tube inner diameter

1. Determine the flow rate of the system

By analyzing the hydraulic system, determine the flow rate of the liquid passing through the pipeline in the hydraulic system;


2. Calculate the flow rate of the liquid

According to the pipeline diameter and the liquid flow rate, calculate the average flow rate of the liquid when passing through the pipeline;


3. Calculate the inner diameter of the pipeline

According to the above hydraulic tube inner diameter calculation formula, calculate the inner diameter of the pipeline.


Hydraulic tube inner diameter specification table

The following table lists the common hydraulic tube inner diameter specifications, where the unit is millimeter (mm).


Inner diameter (mm)

Nominal diameter (mm)

4

6

4.5

6.35

5

7

6

8

6.35

9.52

7

10

8

12

9

12.7

10

14

11

15

12

16

12.7

19.05

14

20

15

21.3

16

22

17

23

18

24

19

25

20

27

22

30

24

32

25

33

27

35

28

36

30

38

32

40

35

42

38

45

40

48

42

50

44.5

54

45

55

48

60

50

63

55

70

57

73

60

75

63

80

65

82

70

89

73

95

76

100

80

102

83

106

88.9

114.3

95

121

102

133

108

140

114

146

121

159

127

168

133

177.8


Adjust the inner diameter of the hydraulic tube according to actual conditions

1. Consider the working state of the hydraulic system

Since the liquid flow resistance in the hydraulic tube changes with the change of flow rate and flow rate, the working state of the hydraulic system, such as working pressure, oil temperature, etc., needs to be considered in the actual calculation to determine the inner diameter of the pipeline.


2. Adjust the inner diameter of the pipeline

When the flow rate, flow rate or other parameters through the pipeline in the hydraulic system change, the inner diameter of the pipeline also needs to be recalculated to ensure the normal operation of the system.


Notes

1. In actual calculations, factors such as the material, length, and curvature of the hydraulic piping need to be considered to determine the inner diameter of the pipeline.


2. If the inner diameter of the hydraulic tube is too small, the resistance will increase and the pressure loss will increase, thus affecting the working efficiency and load capacity of the hydraulic system.


3. If the inner diameter of the hydraulic piping is too large, the material cost will be wasted, and it is easy to get stuck and leak under high pressure.


Conclusion

The inner diameter of the hydraulic tube is an important parameter in the hydraulic system and needs to be calculated and adjusted according to the actual situation. Through reasonable calculation and adjustment, the normal operation of the hydraulic system can be guaranteed, and the working efficiency and load capacity of the system can be improved. Different types of hydraulic tubes may be selected in different application fields, widely used in engineering machinery. This requires that the material selection and specification calculation must be accurately matched to achieve long-term stable operation of the system.