閥門口徑英寸、DN、分對照表,口徑計算公式,閥門口徑換算 - 廣州富山閥門有限公司_威客电竞

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閥門口徑英寸、DN、分對照表及換算公式

2016-06-23 10:42:13| 發布者: 廣州富山閥門有限公司| 查看: 6076

閥門口徑的英寸、DN、分對照表

 

閥門接口的種類有很多,常用的形式有内螺紋、外螺紋、法蘭、卡套等,用于表示口徑大小的單位一般有英寸,公制DN,單位為毫米

英寸in.

DN

公稱外徑mm

1/2

15

φ20

3/4

20

φ25

1

25

φ32

11/4

32

φ40

11/2

40

φ50

2

50

φ63

21/2

65

φ75

3

80

φ90

4

100

φ110

5

125

φ140

6

150

φ160

美制法蘭為ANSI标準,國内用公稱壓力PN表示

ANSI标準閥門磅級與公制标準PN等級對照表

ANSI#

150

300

400

600

800

900

1500

2500

4500

PN bar

PN6

PN25

PN64

PN100

-

PN150

PN250

PN420

PN760

PN10

PN40

PN16

PN50

PN20

 

 

ANSI标準閥門口徑與公制标準閥門工程直徑對照表

英寸

1/8

1/4

3/8

1/2

3/4

1

1 1/4

1 1/2

2

2 1/2

DN(mm)

4

6

10

15

20

25

32

40

50

65

 

英寸

3

3 1/2

4

5

6

8

10

12

14

16

DN(mm)

80

90

100

125

150

200

250

300

350

400

 

英寸

18

20

24

26

28

30

32

34

36

42

DN(mm)

450

500

600

650

700

750

800

850

900

1050

 

英寸

48

54

60

64

72

80

84

88

96

 

DN(mm)

1200

1350

1500

1600

1800

2000

2100

2200

2400

 

國内對口徑的單位有時還用“分”,以下是英寸與分的對照表 

1/8”

1/4”

3/8”

1/2”

3/4”

1”

1分

2分

3分

4分

6分

8分

閥門口徑的英寸、DN換算公式

一、1=25.4 

二、寸 是公稱直徑的英制叫法, mm是國标公制叫法 

三、在管道的規格上沒有絕對的換算公式,對于小于100隻能以 1=25 模糊計算,取其相近的數,對于大于100的管子用1=25可以完全匹配計算。

X/Y=X*25.4÷Y等于DN口徑

1/2=1*25.4÷2=12.7=DN15

閥門口徑的英寸、DN、分對照表及換算公式

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