carbon steel flanges

Nominal Diameter

Outside Diameter

at Bevel

Center to End

Center to Center

Back to Face

45°Elbow

90°Elbow

180°Elbow

B

A

O

K

DN

 NPS

Series A

Series B

Long Radius

Long Radius

Short Radius

Long Radius

Short Radius

Long Radius

Short Radius

15

1/2

21.3

18

16

38

-

76

-

48

-

20

3/4

26.9

25

19

38

-

76

-

51

-

25

1

33.7

32

22

38

25

76

51

56

41

32

1 1/4

42.4

38

25

48

32

95

64

70

52

40

1 1/2

48.3

45

29

57

38

114

76

83

62

50

2

60.3

57

35

76

51

152

102

106

81

65

2 1/2

76.1(73)

76

44

95

64

190

127

132

100

80

3

88.9

89

51

114

76

229

152

159

121

90

3 1/2

101.6

-

57

133

89

267

178

184

140

100

4

114.3

108

64

152

102

305

203

210

159

125

5

139.7

133

79

190

127

381

254

262

197

150

6

168.3

159

95

229

152

457

305

313

237

200

8

219.1

219

127

305

203

610

406

414

313

250

10

273.0

273

159

381

254

762

508

518

391

300

12

323.9

325

190

457

305

914

610

619

467