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DIN 2634 Flange

DIN 2634 Flanges

DIN 2634 Flanges

Table of Content



DIN 2634 PN25 Flange Specification


DIN 2634 PN25 Weld Neck Flange Size Chart 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
DIN 2634 PN 25 Flange Standards ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
DIN 2634 PN25 Welding Neck Flange Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 DIN 2634 PN25 Weld Neck Flange
JIS 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K DIN Carbon steel 2634 PN25 Flanges
UNI 6Bar 10Bar 16Bar 25Bar 40Bar DIN 2634 PN 25 Flange
Flange DIN 2634 pn25 Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS DIN 2634 PN25 WN Flange
EN 6Bar 10Bar 16Bar 25Bar 40Bar DIN 2634 PN25 Flanges
Most common types of DIN 2634 PN25 Flange Forged / Threaded / Screwed / Plate
DIN 2634 PN25 Weld Neck Flange Test Certificates EN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
Production technique
  • Forged, Heat treated and machined
DIN Carbon steel 2634 PN25 Flanges Coating Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized DIN 2634 PN25 Weld Neck Flange
Connect Type/ Flange Face Type Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Special design

As per your drawing

AS, ANSI, BS, DIN and JIS
15 NB (1/2") to 200 NB (8")
Equal and Reducing Configurations
Bridas DIN 2634 pn25 Welding Neck Flange Test Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
Equipment Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Manufacturer of

ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
Flange DIN 2634 pn25: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange

  • B.S: BS4504 , BS3293, BS1560, BS10
  • AS 2129: Table D; Table E; Table H
  • ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
  • ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48
  • ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
  • American standard (ANSI)
  • German (DIN)
  • British standard (BS)
  • DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 DIN 2634 PN25 Flanges
  • The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
Origin Indian / West Europe / Japan / USA / Korean
DIN 2634 PN 25 Flange Uses & application
  • Bitumen upgraders.
  • Heavy oil refineries.
  • Nuclear power (mostly seamless).
  • Petrochemicals and acids.
Bridas DIN 2634 pn25 Welding Neck Flange Export to Indonesia, Ukraine, India, Ireland, Singapore, Saudi Arabia, Spain, Dubai, Peru, Thailand, Korea, Iran, Canada, USA, Brazil, Egypt, Oman, etc
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175

DIN 2634 flange dimensions


Pipe Flange Neck Raised face Screws Weight
(7,85 Kg/dm3)
Rated d1 D b k h1 d3 s r h2 d4 f Holes Thread d2 Kg
Diameter ISO Series DIN Series
15 - 20 95 16 65 38 30 2 4 6 45 2 4 M 12 14 0,746
21,3 - 32
20 - 25 105 18 75 40 38 2,3 4 6 58 2 4 M 12 14 1,06
26,9 - 40
25 - 30 115 18 85 40 42 2,6 4 6 68 2 4 M 12 14 1,29
33,7 - 45
32 - 38 140 18 100 42 52 2,6 6 6 78 2 4 M 16 18 1,88
42,4 - 56
40 - 44,5 150 18 110 45 60 2,6 6 7 88 3 4 M 16 18 2,33
48,3 - 64
50 - 57 165 20 125 48 72 2,9 6 8 102 3 4 M 16 18 2,82
60,3 - 75
65 76,1 - 185 22 145 52 90 2,9 6 10 122 3 8 M 16 18 3,74
80 88,9 - 200 24 160 58 105 3,2 8 12 138 3 8 M 16 18 4,75
100 - 108 235 24 190 65 128 3,6 8 12 162 3 8 M 20 22 6,52
114,3 - 134
125 - 133 270 26 220 68 155 4 8 12 188 3 8 M 24 26 9,07
139,7 - 162
150 - 159 300 28 250 75 182 4,5 10 12 218 3 8 M 24 26 11,8
168,3 - 192
(175) 193,7 - 350 28 280 75 218 5,6 10 15 248 3 12 M 24 26 13,4
200 219,1 - 360 30 310 80 244 6,3 10 16 278 3 12 M 24 26 17
250 - 267 425 32 370 88 292 7,1 12 18 335 3 12 M 27 30 24,4
273 - 298
300 323,9 - 485 34 430 92 352 8 12 18 395 4 16 M 27 30 31,2
350 355,6 - 555 38 490 100 398 8 12 20 450 4 16 M 30 33 47,2
- 368 44,2
400 406,4 - 620 40 550 110 452 8,8 12 20 505 4 16 M 33 36 61,7
- 419 57,9
(450) 457 - 670 42 600 110 500 8,8 12 20 550 4 20 M 33 36 71,9
500 508 - 730 44 660 125 558 10 12 20 615 4 20 M 33 36 89,6
600 610 - 845 46 770 125 660 11 12 20 720 5 20 M 36 39 104
700 711 - 960 46 875 125 760 13 20 24 820 5 24 M 39 42 136
800 813 - 1085 50 990 135 865 14 22 24 930 5 24 M 45 48 186
900 914 - 1185 54 1090 145 968 16 24 28 1030 5 28 M 45 48 236
1000 1016 - 1320 58 1210 155 1070 18 24 28 1140 5 28 M 52 56 307

DIN 2634 PN25 weld neck flange Pressure ratings


Flange Nominal Diameter Pressure Rating (PN)  
**Nominal BSP Pipe Size PN6 PN10 PN16 PN25 PN40  
DN 10 75 90 90 90 90 O.D.
3/8" 50 60 60 60 60 PCD (bolt circle)
  4 x 11 4 x 14 4 x 14 4 x 14 4 x 14 # of holes x diam. of holes
DN 15 80 95 95 95 95 O.D.
1/2" 55 65 65 65 65 PCD (bolt circle)
  4 x 11 4 x 14 4 x 14 4 x 14 4 x 14 # of holes x diam. of holes
DN 20 90 105 105 105 105 O.D.
3/4" 65 75 75 75 75 PCD (bolt circle)
  4 x 11 4 x 14 4 x 14 4 x 14 4 x 14 # of holes x diam. of holes
DN 25 100 115 115 115 115 O.D.
1" 75 85 85 85 85 PCD (bolt circle)
  4 x 11 4 x 14 4 x 14 4 x 14 4 x 14 # of holes x diam. of holes
DN 32 120 140 140 140 140 O.D.
1 1/4" 90 100 100 100 100 PCD (bolt circle)
  4 x 14 4 x 18 4 x 18 4 x 18 4 x 18 # of holes x diam. of holes
DN 40 130 150 150 150 150 O.D.
1 1/2" 100 110 110 110 110 PCD (bolt circle)
  4 x 14 4 x 18 4 x 18 4 x 18 4 x 18 # of holes x diam. of holes
DN 50 140 165 165 165 165 O.D.
2" 110 125 125 125 125 PCD (bolt circle)
  4 x 14 4 x 18 4 x 18 4 x 18 4 x 18 # of holes x diam. of holes
DN 65 160 185 185 185 185 O.D.
2 1/2" 130 145 145 145 145 PCD (bolt circle)
  4 x 14 4 x 18 4 x 18 8 x 18 8 x 18 # of holes x diam. of holes
DN 80 190 200 200 200 200 O.D.
3" 150 160 160 160 160 PCD (bolt circle)
  4 x 18 8 x 18 8 x 18 8 x 18 8 x 18 # of holes x diam. of holes
DN 100 210 220 220 235 235 O.D.
4" 170 180 180 190 190 PCD (bolt circle)
  4 x 18 8 x 18 8 x 18 8 x 22 8 x 22 # of holes x diam. of holes
DN 125 240 250 250 270 270 O.D.
5" 200 210 210 220 220 PCD (bolt circle)
  8 x 18 8 x 18 8 x 18 8 x 26 8 x 26 # of holes x diam. of holes
DN 150 265 285 285 300 300 O.D.
6" 225 240 240 250 250 PCD (bolt circle)
  8 x 18 8 x 22 8 x 22 8 x 26 8 x 26 # of holes x diam. of holes
DN 175   315 315 330 350 O.D.
7"   270 270 280 295 PCD (bolt circle)
    8 x 22 8 x 22 12 x 26 12 x 30 # of holes x diam. of holes
DN 200 320 340 340 360 375 O.D.
8" 280 295 295 310 320 PCD (bolt circle)
  8 x 18 8 x 22 12 x 22 12 x 26 12 x 30 # of holes x diam. of holes
DN 250 375 395 405 425 450 O.D.
10" 335 350 355 370 385 PCD (bolt circle)
  12 x 18 12 x 22 12 x 26 12 x 30 12 x 33 # of holes x diam. of holes
DN 300 440 445 460 485 515 O.D.
12" 395 400 410 430 450 PCD (bolt circle)
  12 x 22 12 x 22 12 x 26 16 x 30 16 x 33 # of holes x diam. of holes
DN 350 490 505 520 555 580 O.D.
14" 445 460 470 490 510 PCD (bolt circle)
  12 x 22 16 x 22 16 x 26 16 x 33 16 x 36 # of holes x diam. of holes
DN 400 540 565 580 620 660 O.D.
16" 495 515 525 550 585 PCD (bolt circle)
  16 x 22 16 x 26 16 x 30 16 x 36 16 x 39 # of holes x diam. of holes
DN 500 645 670 715 730 755 O.D.
20" 600 620 650 660 670 PCD (bolt circle)
  20 x 22 20 x 26 20 x 33 20 x 36 20 x 42 # of holes x diam. of holes
DN 600 755 780 840 845   O.D.
24" 705 725 770 770   PCD (bolt circle)
  20 x 24 20 x 27 20 x 33 20 x 36   # of holes x diam. of holes

din 2634 flange Material


Carbon Steel DIN 2634 PN25 Flange ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Stainless Steel DIN 2634 PN25 Flange ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409
Alloy Steel DIN 2634 PN25 Flange ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Titanium DIN 2634 PN25 Flange ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7
ASTM R50250/GR.1 | R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 |R52400/GR.7 | R53400/GR.12 | R56320/GR.9 |R56400/GR.5
Copper DIN 2634 PN25 Flange T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc
Copper Nickel DIN 2634 PN25 Flange ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Brass DIN 2634 PN25 Flange 3602 / 2604 / H59 / H62 / etc.
Inconel DIN 2634 PN25 Flange ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 DIN 2634 PN25 Flange
Hastelloy DIN 2634 PN25 Flange ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X Flanges
Monel DIN 2634 PN25 Flange ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Alloy 20 DIN 2634 PN25 Flange ASTM B462 / ASME SB462, Carpenter® 20 Alloy, Alloy 20Cb-3
Aluminium DIN 2634 PN25 Flange 5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel DIN 2634 PN25 Flange ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Duplex DIN 2634 PN25 Flange S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex DIN 2634 PN25 Flange S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Incoloy DIN 2634 PN25 Flange ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 Flanges
254 Smo DIN 2634 PN25 Flange ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547
Nimonic DIN 2634 PN25 Flange Nimonic 75, Nimonic 80A, Nimonic 90
Other DIN 2634 PN25 Flange material Tin bronze, Alumunum bronze, Lead bronze

Flanges Dimensions