ASME B16.5 Material A182 Gr. F1 welded neck steel pipe flange

ANSI B16.5 Butt welding neck flange Class300 (PN50)

NPS

DN

 pipe OD

 flange OD

 hole center to hole center

 diam.of holes

 NO. of holes

 thickness

 ID of flange

diam. Of neck

 height of flange

1/2"

15

21.3

95

66.7

16

4

12.7

15.5

38

51

3/4"

20

26.9

115

82.6

18

4

14.3

21

48

56

1"

25

33.7

125

88.9

18

4

15.9

27

54

60

1 1/4"

32

42.4

135

98.4

18

4

17.5

35

64

64

1 1/2"

40

48.3

155

114.3

22

4

19.1

41

70

67

2"

50

60.3

165

127

18

8

20.7

52

84

68

2 1/2"

65

76.1

190

149.2

22

8

23.9

66

100

75

3"

80

88.9

210

168.3

22

8

27

77.5

117

78

4"

100

114.3

255

200

22

8

30.2

101.5

146

84

5"

125

139.7

280

235

22

8

33.4

127

178

97

6"

150

168.3

320

269.9

22

12

35

154

206

97

8"

200

219.1

380

330.2

26