DIN Standardized Flanges

DIN Welding Neck Flanges

DIN - the German Institute for Standardization, is a private organization providing standardization services in Germany.

DIN represents German national interests in Europe and throughout the world. The DIN EN 2527, 25.., 2630, 26.. series of standards cover pressure-temperature ratings, materials, dimensions, tolerances, marking for pipelines for fluid in liquid or gaseous condition.

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Welding Neck Flanges
DIN 2630 2631 PN 1~6

welding neck flanges din 2630 2631 pn1 pn6
Welding Neck Flanges DIN 2630 2631 PN 1~6 Welding neck flanges
Standard DIN 2630, DIN 2631
Core Material Carbon steel and stainless steel
Pressure PN 1~6
Connecting Finish Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
welding neck flanges din 2630 2631 pn1 pn6
DN
mm
inch D
mm
b
mm
K
mm
h1
mm
d4
mm
f
mm
d2
mm
Thread
Holes
Wgt
kg
10 3/8 75 12 50 28 35 2 11 4×M10 0.34
15 1/2 80 12 55 30 40 2 11 4×M10 0.39
20 3/4 90 14 65 32 50 2 11 4×M10 0.59
25 1 100 14 75 35 60 2 11 4×M10 0.75
32 120 14 90 35 70 2 14 4×M12 1.05
40 130 14 100 38 80 3 14 4×M12 1.18
50 2 140 14 110 38 90 3 14 4×M12 1.34
100 4 210 16 170 45 148 3 18 4×M16 3.24
125 5 240 18 200 48 178 3 18 8×M16 4.49
150 6 265 18 225 48 202 3 18 8×M16 5.15
250 10 375 22 335 60 312 3 18 12×M16 10.8
350 14 490 22 445 62 415 4 22 12×M20 16.7
400 16 540 22 495 65 465 4 22 16×M20 19.0
Size
mm
Inch d3
mm
s
mm
r
mm
h2
mm
10 3/8 22 1.8 4 6
15 1/2 28 2 4 6
20 3/4 35 2.3 4 6
25 1 40 2.6 4 6
32 50 2.6 6 6
40 58 2.6 6 7
50 2 70 2.9 6 8
100 4 122 3.6 8 10
125 5 148 4 8 10
150 6 172 4.5 10 12
250 10 282 6.3 12 15
350 14 385 7.1 12 15
400 16 438 7.1 12 15

Welding Neck Flanges
DIN 2632 PN10

Welding Neck Flanges DIN 2632 PN 10 Welding neck flanges
Standard DIN 2632
Core Material Carbon steel and stainless steel
Pressure PN 10
Connecting Finish Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
welding neck flanges din 2632 pn10
DN
mm
inch D
mm
b
mm
K
mm
h1
mm
d4
mm
f
mm
d2
mm
Thread
Holes
Wgt
kg
10 3/8 90 14 60 35 40 2 14 4×M12 0.58
15 1/2 95 14 65 35 45 2 14 4×M12 0.65
20 3/4 105 16 75 38 58 2 14 4×M12 0.95
25 1 115 16 85 38 68 2 14 4×M12 1.14
32 140 16 100 40 78 2 18 4×M16 1.69
40 150 16 110 42 88 3 18 4×M16 1.86
50 2 165 18 125 45 102 3 18 4×M16 2.53
100 4 220 20 180 52 158 3 18 8×M16 4.62
125 5 250 22 210 55 188 3 18 8×M16 6.30
150 6 285 22 240 55 212 3 22 8×M20 7.75
250 10 395 26 350 68 320 3 22 12×M20 14.7
350 14 505 26 460 68 430 4 22 16×M20 21.6
400 16 565 26 515 72 482 4 26 16×M24 26.2
Size
mm
Inch d3
mm
s
mm
r
mm
h2
mm
10 3/8 25 1.8 4 6
15 1/2 30 2 4 6
20 3/4 38 2.3 4 6
25 1 42 2.6 4 6
32 52 2.6 6 6
40 60 2.6 6 7
50 2 72 2.9 6 8
100 4 125 3.6 8 12
125 5 150 4 8 12
150 6 175 4.5 10 12
250 10 285 6.3 12 16
350 14 385 7.1 12 16
400 16 440 7.1 12 16

Welding Neck Flanges
DIN 2633 PN16

Welding Neck Flanges DIN 2633 PN 16 Welding neck flanges
Standard DIN 2633
Core Material Carbon steel and stainless steel
Pressure PN 16
Connecting Finish Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
welding neck flanges din 2633 pn16
DN
mm
inch D
mm
b
mm
K
mm
h1
mm
d4
mm
f
mm
d2
mm
Thread
Holes
Wgt
kg
10 3/8 90 14 60 35 40 2 11 4×M12 0.58
15 1/2 95 14 65 35 45 2 11 4×M12 0.65
20 3/4 105 16 75 38 58 2 11 4×M12 0.95
25 1 115 16 85 38 68 2 11 4×M12 1.14
32 140 16 100 40 78 2 14 4×M16 1.69
40 150 16 110 42 88 3 14 4×M16 1.86
50 2 165 18 125 45 102 3 14 4×M16 2.53
100 4 220 20 180 52 158 3 18 8×M16 4.62
125 5 250 22 210 55 188 3 18 8×M16 6.30
150 6 285 22 240 55 212 3 22 8×M20 7.75
250 10 405 26 355 70 320 3 26 12×M24 15.6
350 14 520 30 470 82 438 4 26 16×M24 28.8
400 16 580 32 525 85 490 4 30 16×M27 36.3
Size
mm
Inch d3
mm
s
mm
r
mm
h2
mm
10 3/8 25 1.8 4 6
15 1/2 30 2 4 6
20 3/4 38 2.3 4 6
25 1 42 2.6 4 6
32 52 2.6 6 6
40 60 2.6 6 7
50 2 72 2.9 6 8
100 4 125 3.6 8 12
125 5 150 4 8 12
150 6 175 4.5 10 12
250 10 285 6.3 12 16
350 14 390 8 12 16
400 16 445 8 12 16

Welding Neck Flanges
DIN 2634 PN25

Welding Neck Flanges DIN 2634 PN 25 Welding neck flanges
Standard DIN 2634
Core Material Carbon steel and stainless steel
Pressure PN 25
Connecting Finish Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
welding neck flanges din 2634 pn25
DN
mm
inch D
mm
b
mm
K
mm
h1
mm
d4
mm
f
mm
d2
mm
Thread
Holes
Wgt
kg
10 3/8 90 16 60 35 40 2 14 4×M12 0.66
15 1/2 95 16 65 38 45 2 14 4×M12 0.75
20 3/4 105 18 75 40 58 2 14 4×M12 1.06
25 1 115 18 85 40 68 2 14 4×M12 1.29
32 140 18 100 42 78 2 18 4×M16 1.88
40 150 18 110 45 88 3 18 4×M16 2.33
50 2 165 20 125 48 102 3 18 4×M16 2.82
100 4 235 24 190 65 162 3 22 8×M20 6.52
125 5 270 26 220 68 188 3 26 8×M24 9.07
150 6 300 28 250 75 218 3 26 8×M24 11.8
250 10 425 32 370 88 335 3 30 12×M27 24.4
350 14 555 38 490 100 450 4 33 16×M30 44.2
400 16 620 40 550 110 505 4 36 16×M33 57.6
Size
mm
Inch d3
mm
s
mm
r
mm
h2
mm
10 3/8 25 1.8 4 6
15 1/2 30 2 4 6
20 3/4 38 2.3 4 6
25 1 42 2.6 4 6
32 52 2.6 6 6
40 60 2.6 6 7
50 2 72 2.9 6 8
100 4 128 3.6 8 12
125 5 155 4 8 12
150 6 182 4.5 10 12
250 10 292 6.3 12 18
350 14 398 8 12 20
400 16 452 8.8 12 20

Welding Neck Flanges
DIN 2635 PN40

Welding Neck Flanges DIN 2635 PN 40 Welding neck flanges
Standard DIN 2635
Core Material Carbon steel and stainless steel
Pressure PN 40
Connecting Finish Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
welding neck flanges din 2635 pn40
DN
mm
inch D
mm
b
mm
K
mm
h1
mm
d4
mm
f
mm
d2
mm
Thread
Holes
Wgt
kg
10 3/8 90 16 60 35 40 2 14 4×M12 0.66
15 1/2 95 16 65 38 45 2 14 4×M12 0.75
20 3/4 105 18 75 40 58 2 14 4×M12 1.06
25 1 115 18 85 40 68 2 14 4×M12 1.29
32 140 18 100 42 78 2 18 4×M16 1.88
40 150 18 110 45 88 3 18 4×M16 2.33
50 2 165 20 125 48 102 3 18 4×M16 2.82
100 4 235 24 190 65 162 3 22 8×M20 6.52
125 5 270 26 220 68 188 3 26 8×M24 9.07
150 6 300 28 250 75 218 3 26 8×M24 11.8
250 10 450 38 385 105 345 3 33 12×M30 34.9
350 14 580 46 510 12  465 4 36 16×M33 68.1
400 16 660 50 585 135 535 4 39 16×M36 96.5
Size
mm
Inch d3
mm
s
mm
r
mm
h2
mm
10 3/8 25 1.8 4 6
15 1/2 30 2 4 6
20 3/4 38 2.3 4 6
25 1 42 2.6 4 6
32 52 2.6 6 6
40 60 2.6 6 7
50 2 72 2.9 6 8
100 4 128 3.6 8 12
125 5 155 4 8 12
150 6 182 4.5 10 12
250 10 298 7.1 12 18
350 14 408 8.8 12 20
400 16 462 11 12 20