ASME B 16.5-2003 CLASS 400

CLASS 400

FLANGE 
THICKNESS

LTB

DRILLINE DATA

CLASS 400

NOMINAL 
PIPE SIZE

FLANGE 
OUTSIDE 
DIAMETER

THICKNESS 
OF 
FLANCE 
MIN

BOSSED
LENGTH

WELD 
NECK
LENGTH
*

LAP JOINT
LENGTH

LONG 
WELD
NECK
LENGTH

PITCH
CIRCLE
DIAMETER

BOLT
HOLE
DIAMETER

NUMBER
OF
BOLT
HOLES

NOMINAL 
PIPE SIZE

MM

INCH

OD

T & T1

L

L1

L2

L3

PCD

H

#

MM

INCH

15

1/2

95

14.3

29

59

22

229

66.7

16

4

15

1/2

20

3/4

115

15.9

32

64

25

229

82.6

20

4

20

3/4

25

1

125

17.5

34

69

27

229

88.9

20

4

25

1

32

1 1/4

135

20.7

36

74

29

229

98.4

20

4

32

1 1/4

40

1 1/2

155

22.3

39

77

32

229

114.3

22

4

40

1 1/2

50

2

165

25.4

44

80

37

229

127

20

8

50

2

65

2 1/2

190

28.6

48

86

41

229

149.2

22

8

65

2 1/2

80

3

210

31.8

53

90

46

229

168.3

22

8

80

3

90

3 1/2

230

35

56

93

49

229

184.2

26

8

90

3 1/2

100

4

255

35

58

96

51

229

200

26

8

100

4

125

5

280

38.1

61

109

54

305

235

26

8

125

5

150

6

320

41.3

64

110

57

305

269.9

26

12

150

6

200

8

380

47.7

75

124

68

305

330

30

12

200

8

250

10

445

54

80

131

102

305

387.5

32

16

250

10

300

12

520

57.2

86

144

108

305

450.8

35

16

300

12

350

14

585

60.4

91

156

117

305

514.4

35

20

350

14

400

16

650

63.5

101

159

127

305

571.5

38

20

400

16

450

18

710

66.7

105

172

137

305

628.6

38

24

450

18

500

20

775

69.9

109

175

146

305

685.8

42

24

500

20

600

24

915

76.2

121

182

159

305

812.8

48

24

600

24

NOTES:*Schedule of weld neck to be indicated.