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Threaded Flanges

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Details

China Threaded Flanges:

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL recount threads);
Class 150 threaded flanges are made without a counterbore. Threads are chamfered to the major diameter (approx.) at an angle of 45 ° (approx.) at the back of the flange;
Weights are based on manufacturer’s data and are approximate.

Specification:

Pipe

Flange Data

Hub

Raised Face

Drilling Data

Nominal
Pipe
Size

Outside
Diameter

A

C

D

E

F

G

H

I

J

Overall
Diameter

Flange
Thickness
min

Overall
Length

Threaded
length
min

Hub
Diameter

Face
Diameter

Number
of Holes

Bolt Hole
Diameter

Diameter
of Circle
of Holes

in
mm

in
mm

in
mm

in
mm

in
mm

in
mm

in
mm

in
mm

in
mm

in
mm

1/2

0.84
21.3

3.5
88.9

0.44
11.2

0.62
15.7

0.62
15.7

1.19
30.2

1.38
35.1

4

0.62
15.7

2.38
60.45

3/4

1.050
26.70

3.880
98.60

0.500
12.70

0.62
15.7

0.62
15.7

1.500
38.10

1.690
42.90

4

0.620
15.70

2.750
69.85

1

1.315
33.40

4.250
108.0

0.560
14.20

0.690
17.50

0.690
17.50

1.940
49.30

2.000
50.80

4

0.620
15.70

3.120
79.25

1 1/4

1.660
42.20

4.620
117.3

0.620
15.70

0.810
20.60

0.810
20.60

2.310
58.70

2.500
63.50

4

0.620
15.70

3.500
88.90

1 1/2

1.900
48.30

5.000
127.0

0.690
17.50

0.880
22.40

0.880
22.30

2.560
65.00

2.880
73.15

4

0.620
15.70

3.880
98.60

2

2.375
60.30

6.000
152.4

0.750
19.10

1.000
25.40

1.000
25.40

3.060
77.70

3.620
91.90

4

0.750
19.10

4.750
120.7

2 1/2

2.875
73.00

7.000
177.8

0.880
22.40

1.120
28.40

1.120
28.40

3.560
90.40

4.120
104.6

4

0.750
19.10

5.500
139.7

3

3.500
88.90

7.500
190.5

0.940
23.90

1.190
30.20

1.190
30.20

4.250
108.0

5.000
127.0

4

0.750
19.10

6.000
152.4

3 1/2

4.000
101.6

8.500
215.9

0.940
23.90

1.250
31.75

1.250
31.75

4.810
122.2

5.500
139.7

8

0.750
19.10

7.000
177.8

4

4.500
114.3

9.000
228.6

0.940
23.90

1.310
33.30

1.310
33.30

5.310
134.9

6.190
157.2

8

0.750
19.10

7.500
190.5

5

5.563
141.3

10.00
254.0

0.940
23.90

1.440
36.60

1.440
36.60

6.440
163.6

7.310
185.7

8

0.880
22.40

8.500
215.9

6

6.625
168.3

11.00
279.4

1.000
25.40

1.560
39.60

1.560
39.60

7.560
192.0

8.500
215.9

8

0.880
22.40

9.500
241.3

8

8.625
219.1

13.50
342.9

1.120
28.40

1.750
44.50

1.750
44.50

9.690
246.1

10.62
269.7

8

0.880
22.40

11.75
298.5

10

10.75
273.0

16.00
406.4

1.190
30.20

1.940
49.30

1.940
49.30

12.00
304.8

12.75
323.9

12

1.000
25.40

14.25
362.0

12

12.75
323.8

19.00
482.6

1.250
31.75

2.190
55.60

2.190
55.60

14.38
365.3

15.00
381.0

12

1.000
25.40

17.00
431.8

14

14.00
355.6

21.00
533.4

1.380
35.10

2.250
57.15

2.250
57.15

15.75
400.1

16.25
412.7

12

1.120
28.40

18.75
476.3

16

16.00
406.4

23.50
596.9

1.440
36.60

2.500
63.50

2.500
63.50

18.00
457.2

18.50
469.9

16

1.120
28.40

21.25
539.8

18

18.00
457.2

25.00
635.0

1.560
39.60

2.690
68.30

2.690
68.30

19.88
505.0

21.00
533.4

16

1.250
31.75

22.75
577.9

20

20.00
508.0

27.50
698.5

1.690
42.90

2.880
73.15

2.880
73.15

22.00
558.8

23.00
584.2

20

1.250
31.75

25.00
635.0

24

24.00
609.6

32.00
812.8

1.880
47.80

3.250
82.60

3.250
82.60

26.12
663.4

27.25
692.2

20

1.380
35.10

29.50
749.3

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