DINFLANGE DIN 2628

(Dimensions in mm)

 

Nominal Pressure 250

Pipe

Flange

Neck

Raised Face

Drilling

Approx.
Weight
(7.85 kg/dm3)
kg

Nominal
Size

d1

D

b

k

h1

d3

s

r1

h2

d4

f

r2

d51)

Number
of
Holes

Bolt
Diameter

d2

15

20
21.3

130

26

90

60

48

2.6

4

6

45

2

1

24

4

M16

(5/8")

18

2.47

25

30
33.7*)

150

28

105

65

60

3.6

4

8

65

2

1

35

4

M20

(3/4")

23

3.51

40

44.5
48.3*)

185

34

135

80

84

5

6

10

85

3

1.5

52

4

M24

(7/8")

27

6.45

50

57
60.3*)

200

38

150

85

95

6.3

6

10

95

3

1.5

63

8

M24

(7/8")

27

7.85

65

76.1*)

230

42

180

95

124

8

6

12

105

3

1.5

85

8

M24

(78/")

27

12.2

80

95
101.6*)

255

46

200

102

136

11

8

12

130

3

1.5

97

8

M27

(1")

30

16.0

100

121
127*)

300

54

235

120

164

14.2

8

14

160

3

1.5

124

8

M30

(1 1/8")

33

26.3

125

(146)
152.4*)

340

60

275

140

200

16

8

16

185

3

1.5

153

12

M30

(1 1/8")

33

37.8

150

(171)
177.8*)

390

68

320

160

240

17.5

10

18

215

3

1.5

181

12

M33

(1 1/4")

36

58.0

(175)

216
219.1*)

430

74

355

170

270

22.2

10

22

270

3

1.5

218

12

M36

(1 3/8")

39

73.6

200

(241)
244.5*)

485

82

400

190

305

25

10

25

300

3

1.5

243

12

M39

(1 1/2")

42

105

250

(292)
298.5*)

585

100

490

215

385

32

12

30

350

3

1.5

298

16

M45

(1 3/4")

48

182

 

Size in parentheses should preferably be avoided. 
*) Outer dimameter of pipe corresponds to ISO
recommendation R64.
1) Diameter for the lens sealing by DIN 2696. Refer toDIN
2696 for nomianl size 10.
Material (to be specified by orderer):
RSt. 42-2 by DIN 17100 for temperature 300 °C
Weldable heat-treated steel for temperature >  300 °C.
Process: Machining the outside diameter, bore, gasket
surface, bevel end for welding, spot face for nut,
and bolt holes. 
Marking: Every flange should be marked with the following
data at the outside diameter : 
Company mark, nominal size, nominal pressure,
and material.