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ANSI B16.5 / ASME B16.47 Orifice Flange stockist


Stockholder of Raised Face Orifice Flange, ASME B16.5 / ANSI B16.47 Orifice Flanges, We are offering competitive prices on DIN Orifice Flange, Series A & B Orifice Flange, MSS Orifice Flange


SS Orifice Flanges, Alloy Steel Orifice Flanges, Nickel Alloy 200 Orifice Flanges, Carbon Steel Orifice Flanges, Inconel Orifice Flanges, Hastelloy Orifice Flanges, Copper Nickel Orifice Flanges, Duplex & Super Duplex Orifice Flanges, Alloy 20 Orifice Flanges



Orifice Flanges stockist
Orifice Flanges

Cromwell Distribution is a Dominant and Expert Stockist of high quality ASME/ANSI/DIN industrial Orifice flanges . We offer immediate delivery programs for standard size of carbon steel Orifice flanges and stainless steel Orifice flanges. Orifice Orifice flanges in special stainless steel grades, nickel alloy and alloy steel can be supplied with just in time programs.

Commonly referred as blanking flanges, Orifice pipe flanges are widely used in high pressure applications. Orifice flanges are generally used to seal the end of a piping system to prevent flow of liquids or gases. The use of Orifice flanges allows ease of access to a piping system once it has been closed.

Our Orifice flanges are available with raised or RTJ faces and also with female threads. Orifice flanges can be supplied with or without hub as per the customer requirements. We offer Orifice Orifice flanges at our facility to companies in various industries including shipbuilding, power generation, petrochemical plants, oil refineries, waste water treatment plants, paper mills, pharmaceutical plants and turnkey projects among others.


What is Orifice Flange ?

Orifice Flanges are used with orifice meters for the purpose of measuring the flow rate of either liquids or gases in the respective pipeline. Pairs of pressure “Tappings”, mostly on 2 sides, directly opposite each other, are machined into the orifice flange.

Orifice Flange Unions are designed &` to AGA, ASME, and ISA recommendations. We are stockists of wide array of the following types:

  • » Raised Face weld neck orifice flanges.
  • » Slip on threaded ring joint corner tap weld neck orifice flanges.
  • » Raised Face slip-on orifice flange.
  • » Ring-Type joint weld neck orifice flanges.
  • » Corner tap orifice flanges

Orifice Flanges Specification


Orifice Flanges Production Range

Type : Orifice Flanges
Size : ½” (15 NB) to 48″ (1200NB)
Standard : ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, EN1092, UNI 2277/2278, DIN, JIS, SABS1123, GOST-12820
Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
BS : BS4504 , BS4504, BS1560, BS10
In Form : SORF, WNRF, BLRF, SWRF, LAP Joint, Threaded, Reducing, Spectacle, etc
Specialize : As per drawing
Coating/Surface Treatment : Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Connection Type : Ring Type Joint, Lap-Joint Face, Raised Face, Flat Face, Large Male-Female, Small Male-Female, Large
Tongue & Groove, Small Tongue & Groove
Flange Face Type : Flat Face (FF), Raise Face (RF), Ring Joint (RJT)
Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Packing : No Fumigate or Fumigate Plywood/Wood Pallet or Case
Usage : Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Pipe Projects etc.

Orifice Flange – Standards

ASME: ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, EN1092, UNI 2277/2278, DIN, JIS, SABS1123, GOST-12820

DIN: DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673

EN: EN10253-1, EN10253-2


Orifice Flange Materials Grades

Materials : Standard, Grades
Stainless Steel Orifice Flanges : ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Carbon Steel Orifice Flanges : ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52,
F60, F65, F70
Alloy Steel Orifice Flanges : ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Duplex Steel Orifice Flanges : ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
6% Moly / Super Duplex Orifice Flanges : ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Low Temperature Steel Orifice Flanges : ASTM A350 LF2, LF3, LF6
High Yield Orifice Flanges : ASTM A694 F42, F52, F60, F65, F70
Nickel Alloys Orifice Flanges : ASTM SB564, SB160, SB472, SB162 – Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020)
Copper Alloys Orifice Flanges : ASTM SB 61 , SB62 , SB151 , SB152 – UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
Alloys Orifice Flanges : ALLOY 20, ALLOY C, ALLOY C276, ALLOY B2
Other Grade of Orifice Flanges : Bronze, Brass, Cupro Nickel, Titanium, Inconel, Monel, Hastelloy


ASME B16.5 Orifice Flange Dimensions


Raised Face Weld Neck Orifice Flanges (Class 300 Dimensions):
Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD Welding Neck Length RF Dia. RF Height PCD Orifice Hole dia No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size Weight in kg
A B C D E F G H I
1 25 125 36.6 54 33.4 81 50.8 2 88.9 6.4 4 5/8 125 3/4 M16 4.5
1 1/2 40 155 36.6 70 48.3 84 73 2 114.3 6.4 4 3/4 135 7/8 M20 6.5
2 50 165 36.6 84 60.3 84 92.1 2 127 6.4 8 5/8 125 3/4 M16 7
2 1/2 65 190 36.6 100 73 87 104.8 2 149.2 6.4 8 3/4 135 7/8 M20 7.5
3 80 210 36.6 117 88.9 87 127 2 168.3 9.5 8 3/4 135 7/8 M20 9.4
4 100 255 36.6 146 114.3 90 157.2 2 200 12.7 8 3/4 135 7/8 M20 13.2
6 150 320 36.6 206 168.3 98 215.9 2 269.9 12.7 12 3/4 135 7/8 M20 14.6
8 200 380 39.7 260 219.1 110 269.9 2 330.2 12.7 12 7/8 145 1 M24 30
10 250 445 46.1 321 273 116 323.8 2 387.3 12.7 16 1 165 1 1/8 M27 41
12 300 520 49.3 375 323.8 129 381 2 450.8 12.7 16 1 1/8 180 1 1/4 M30 62
14 350 585 52.4 425 355.6 141 412.8 2 514.4 12.7 20 1 1/8 185 1 1/4 M30 84
16 400 650 55.6 483 406.4 144 469.9 2 571.5 12.7 20 1 1/4 195 1 3/8 M33 111
18 450 710 58.8 533 457 157 533.4 2 628.6 12.7 24 1 1/4 205 1 3/8 M33 138
20 500 775 62 587 508 160 584.2 2 685.8 12.7 24 1 1/4 215 1 3/8 M33 171
24 600 915 68.3 702 610 167 692.2 2 812.8 12.7 24 1 1/2 240 1 5/8 M39 247

Raised Face Weld Neck Orifice Flanges (Class 600 Dimensions):
Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD Welding Neck Length RF Dia. RF Height PCD Orifice Hole dia No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size Weight in kg
A B C D E F G H I
1 25 125 36.6 54 33.5 81 50.8 7 88.9 6.4 4 5/8 125 3/4 M16 5.5
1 1/2 40 155 36.6 70 48.3 84 73 7 114.3 6.4 4 3/4 135 7/8 M20 7.8
2 50 165 36.6 84 60.3 84 92.1 7 127 6.4 8 5/8 125 3/4 M16 8.3
2 1/2 65 190 36.6 100 73 87 104.8 7 149.2 6.4 8 3/4 135 7/8 M20 10.8
3 80 210 36.6 117 88.9 87 127 7 168.3 9.5 8 3/4 135 7/8 M20 12.6
4 100 275 38.1 152 114.3 102 157.2 7 215.9 12.7 8 7/8 150 1 M24 19
6 150 355 47.7 222 168.3 117 215.9 7 292.1 12.7 12 1 180 1 1/8 M27 37
8 200 420 55.6 273 219.1 133 269.9 7 349.2 12.7 12 1 1/8 195 1 1/4 M30 53
10 250 510 63.5 343 273 152 323.8 7 431.8 12.7 16 1 1/4 220 1 3/8 M33 86
12 300 560 66.7 400 323.8 156 381 7 489 12.7 20 1 1/4 230 1 3/8 M33 102
14 350 605 69.9 432 355.6 165 412.8 7 527 12.7 20 1 3/8 240 1 1/2 M36 150
16 400 685 76.2 495 406.4 178 469.9 7 603.2 12.7 20 1 1/2 260 1 5/8 M39 190
18 450 745 82.6 546 457.2 184 533.4 7 654 12.7 20 1 5/8 280 1 3/4 M42 240
20 500 815 88.9 610 508 190 584.2 7 723.9 12.7 24 1 5/8 300 1 3/4 M42 295
24 600 940 101.6 718 609.6 203 692.2 7 838.2 12.7 24 1 7/8 335 2 M48 365

Raised Face Weld Neck Orifice Flanges (Class 900 Dimensions) :
Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD Welding Neck Length RF Dia. RF Height PCD Orifice Hole dia No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size Weight in kg
A B C D E F G H I
1 25 150 38.1 52 33.5 83 50.8 7 101.6 6.4 4 7/8 150 1 M24 5.4
1 1/2 40 180 38.1 70 48.3 89 73 7 123.8 6.4 4 1 160 1 1/8 M27 7.8
2 50 215 38.1 105 60.3 102 92.1 7 165.1 6.4 8 7/8 150 1 M30 11.5
2 1/2 65 245 41.3 124 73 105 104.8 7 190.5 6.4 8 1 165 1 1/8 M27 15.8
3 80 240 38.1 127 88.9 102 127 7 190.5 9.5 8 7/8 150 1 M24 22
4 100 290 44.5 159 114.3 114 157.2 7 235 12.7 8 1 1/8 180 1 1/4 M30 22
6 150 380 55.6 235 168.3 140 215.9 7 317.5 12.7 12 1 1/8 195 1 1/4 M30 70
8 200 470 63.5 298 219.1 162 269.9 7 393.7 12.7 12 1 3/8 230 1 1/2 M36 119
10 250 545 69.9 368 273 184 323.8 7 469.9 12.7 16 1 3/8 240 1 1/2 M36 204
12 300 610 79.4 419 323.8 200 381 7 533.4 12.7 20 1 3/8 260 1 1/2 M36 303
14 350 640 85.8 451 355.6 213 412.8 7 558.8 12.7 20 1 1/2 280 1 5/8 M39 400
16 400 705 88.9 508 406.4 216 469.9 7 616 12.7 20 1 5/8 290 1 3/4 M42 510
18 450 785 101.9 565 457.2 229 533.4 7 685.8 12.7 20 1 7/8 330 2 M48 738
20 500 855 108 622 508 248 584.2 7 749.3 12.7 20 2 355 2 1/8 M52 932
24 600 1040 139.7 749 609.6 292 692.2 7 901.7 12.7 20 2 1/2 445 2 5/8 M64 1511

Raised Face Weld Neck Orifice Flanges (Class 1500 Dimensions):
Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD Welding Neck Length RF Dia. RF Height PCD Orifice Hole dia No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size Weight in kg
A B C D E F G H I
1 25 150 38.1 52 33.5 83 50.8 7 101.6 6.4 4 7/8 150 1 M24 5.4
1 1/2 40 180 38.1 70 48.3 89 73 7 123.8 6.4 4 1 160 1 1/8 M27 7.8
2 50 215 38.1 105 60.3 102 92.1 7 165.1 6.4 8 7/8 150 1 M24 11.5
2 1/2 65 245 41.3 124 73 105 104.8 7 190.5 6.4 8 1 165 1 1/8 M27 15.8
3 80 265 47.7 133 88.9 117 127 7 203.2 9.5 8 1 1/8 185 1 1/4 M30 22
4 100 310 54 162 114.3 124 157.2 7 241.3 12.7 8 1 1/4 205 1 3/8 M33 22
6 150 395 82.6 229 168.3 171 215.9 7 317.5 12.7 12 1 3/8 265 1 1/2 M36 70
8 200 485 92.1 292 219.1 213 269.9 7 393.7 12.7 12 1 5/8 300 1 3/4 M42 119
10 250 585 108 368 273 254 323.8 7 482.6 12.7 12 1 7/8 345 1 M48 204
12 300 675 123.9 451 323.8 283 381 7 571.5 12.7 16 2 380 2 1/8 M52 303
14 350 750 133.4 495 355.6 298 412.8 7 635 12.7 16 2 1/4 415 2 3/8 M56 400
16 400 825 146.1 552 406.4 311 469.9 7 704.8 12.7 16 2 1/2 450 2 5/8 M64 510
18 450 915 162 597 457.2 327 533.4 7 774.7 12.7 16 2 3/4 500 2 7/8 M72 738
20 500 985 177.8 641 508 356 584.2 7 831.8 12.7 16 3 545 3 1/8 M76 932
24 600 1170 203.2 762 609.6 406 692.2 7 990.6 12.7 16 3 1/2 620 3 5/8 M90 1511

Raised Face Weld Neck Orifice Flanges (Class 2500 Dimensions):
Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD Welding Neck Length RF Dia. RF Height PCD Orifice Hole dia No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size Weight in kg
A B C D E F G H I
1 25 160 38.1 57 33.5 92 50.8 7 108 6.4 4 7/8 150 1 M24 6.5
1 1/2 40 205 44.5 79 48.3 111 73 7 146 6.4 4 1 1/8 180 1 1/4 M30 13
2 50 235 50.8 95 60.3 127 92.1 7 171.4 6.4 8 1 185 1 1/8 M27 19
2 1/2 65 265 57.2 114 73 143 104.8 7 196.8 6.4 8 1 1/8 205 1 1/4 M30 24
3 80 305 66.7 133 88.9 168 127 7 228.6 9.5 8 1 1/4 230 1 3/8 M33 43
4 100 355 76.2 165 114.3 190 157.2 7 273 12.7 8 1 1/2 260 1 5/8 M39 66
6 150 485 108 235 168.3 273 215.9 7 368.3 12.7 8 2 350 2 1/8 M52 172
8 200 550 127 305 219.1 318 269.9 7 438.2 12.7 12 2 385 2 1/8 M52 261
10 250 675 165.1 375 273 419 323.8 7 539.8 12.7 12 2 1/2 490 2 5/8 M64 485
12 300 760 184.2 441 323.8 464 381 7 619.1 12.7 12 2 3/4 540 2 7/8 M72 730

Orifice Flanges - Marking & Packing

Products are packaged to ensure that there is no damage during transit. packaging is done in wooden cases. All Orifice Flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.


Orifice Flanges - Value Added Services


  • Hot Dipped Galvanizing
  • Epoxy & FBE Coating
  • Electro Polish

Orifice Flanges - Quality Assurance

At Cromwell Distribution, all flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.


Contact Cromwell Distribution for best offer of Orifice Flanges
Call: (361) 510-2964
Emailsales@cromwelldistribution.com