JIS 20K

LTB

DRILLING DATA

JIS 20K

NOMINAL PIPE SIZE

OUTSIDE 
DIAMETER

THICKNESS
OF FLANGE MIN

THINKNESS
BLIND MIN

BOSSES
LENGTH
SOH,SWLJ

WELD NECK
LENGTH

PITCH
CIRCLE
DIAMETER

NUMBER OF BOLT HOLES

BOLT HOLE DIAMETER

NOMINAL PIPE SIZE

MM

INCH

C

T

T1

L

L1

PCD

#

H

MM

INCH

10

3/8

90

14

14

20

33

65

4

15

10

3/8

15

1/2

95

14

14

20

34

70

4

15

15

1/2

20

3/4

100

16

16

22

36

75

4

15

20

3/4

25

1

125

16

16

24

38

90

4

19

25

1

32

1 1/4

135

18

18

26

41

100

4

19

32

1 1/4

40

1 1/2

140

18

18

26

41

105

4

19

40

1 1/2

50

2

155

18

18

26

42

120

8

19

50

2

65

2 1/2

175

20

20

30

48

140

8

19

65

2 1/2

80

3

200

22

22

34

51

160

8

23

80

3

90

3 1/2

210

24

24

36

54

170

8

23

90

3 1/2

100

4

225

24

24

36

58

185

8

23

100

4

125

5

270

26

26

40

64

225

8

25

125

5

150

6

305

28

28

42

73

260

12

25

150

6

200

8

350

30

30

46

77

305

12

25

200

8

250

10

430

34

34

52

87

380

12

27

250

10

300

12

480

36

36

56

94

430

16

27

300

12

350

14

540

40

40

62

110

480

16

33

350

14

400

16

605

46

46

70

123

540

16

33

400

16

450

18

675

48

48

78

134

605

20

33

450

18

500

20

730

50

50

84

136

660

20

33

500

20

550

22

795

52

52

90

143

720

20

39

550

22

600

24

845

54

56

96

149

770

24

39

600

24