DINFLANGE DIN 2636

(Dimensions in mm)

Nominal Pressure 64

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

Number
of
Holes

Bolt
Diameter

d2

50

57
60.3*)

180

26

135

62

78
82

2.9

6

10

95

3

1.5

4

M20

(3/4")

23

4.55

65

76.1*)

205

26

160

68

98

3.2

6

12

120

3

1.5

8

M20

(3/4")

23

5.73

80

88.9*)

215

28

170

72

112

3.6

8

12

130

3

1.5

8

M20

(3/4")

23

6.69

100

108
114.3*)

250

30

200

78

132
138

4

8

12

160

3

1.5

8

M24

(7/8")

27

9.66

125

133
139.7*)

295

34

240

88

162
168

4.5

8

12

185

3

1.5

8

M27

(1")

30

15.1

150

159
168.3*)

345

36

280

95

192
202

5.6

10

12

215

3

1.5

8

M30

(1 1/8")

33

21.9

(175)

(191)
193.7*)

375

40

310

105

225
228

6.3

10

16

245

3

1.5

12

M30

(1 1/8")

33

23.7

200

216
219.1*)

415

42

340

110

252
256

7.1

10

16

270

3

1.5

12

M33

(1 1/4")

36

34.9

250

267
273*)

470

46

400

125

310
316

8.8

12

18

325

3

1.5

12

M33

(1 1/4")

36

49.6

300

318
323.9*)

530

52

460

140

365
372

11

12

18

375

4

1

16

M33

(1 1/4")

36

68.7

350

368
355.6*)

600

56

525

150

420

12.5

12

20

435

4

2

16

M36

(1 3/8")

39

94.6

400

419
406.4*)

670

60

585

160

475

14.2

12

20

485

4

2

16

M39

(1 1/2")

42

124

Refer to DIN 2637 for nominal size 10-40.
*) Outer dimameter of pipe corresponds to ISO
recommendation R64.
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, and bolt holes. 
Marking: Every flange is marked with the following data
at the outside diameter: Company mark,
            nominal size, nominal pressure and material.