Stockiest Supplies of Stainless Steel Products

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Flanges

The Stainless Steel Flanges are available in various shapes, sizes and pressure ratings. The flanges are manufactured using optimum quality material and thereby ensure excellent durability and corrosion resistance. Ideal for high temperature and pressure applications, these flanges are customized as per the precise demands of the clients. These flanges are highly praised for offering hassle free performance and high functionality.

We manufacture a wide range of variety of flanges including Slip on, Weld Neck, Blind, Threaded, Lap Joint Stainless Steel Plate Flanges, Stainless Steel Back up Flanges, etc.

Flanges are piping components bolted together using gasket in between two flanges as a sealing material. Flanges are used to connect pipes with each other, connect pipes to flanged valves, connect pipes to flanged fittings, connect pipes to flanged piping specialty items such as strainers and to isolate piping sections using a blind flange.

Threaded

Socket Welding
(½” to 2½” Only)

Slip-on Welding

Blind

Lapped

Welding Neck

Dimensions of Flanges as Per Ansi B 16.5

Dimensions of Class 150 Flanges as Per Ansi B 16.5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Nominal Pipe Size
NPS 		Outside Diameter of Flange
O 		Thickness of Flange, Min.,
t1 		Drilling Diameter of Hub,
X 		Hub Diameter Begin- ning of Chamfer Welding Neck
A 		Lenght Thru Hub Threaded/ Lenght Threaded Min.
B 		Bore Comer Radius of Bore Lapped Flange and Pipe,
R 		Depth of Socket
D 		Diameter of RF,
R
Thickness Lap Joint Min.,
t1 		Diameter of Blot Circle
W 		Diameter of Blot
Holes 		Numbers
of Blots 		Threaded
/Slip-On
/Socket Welding,
Y 		Lapped
Y 		Welding,
Y 		Slip-On/ Socket Welding. Min.
B 		Lapped Min.
B 		Welding Neck/ Socket Welding B
(Note(2)
1/2 90 9.6 11.2 60.3 15.9 4 30 21.3 14 16 46 16 22.2 22.9 15.8 3 10 34.9
3/4 100 11.2 12.7 6.9.9 15.9 4 38 26.7 14 16 51 16 27.7 28.2 20.9 3 11 42.9
1 110 12.7 14.3 79.4 15.9 4 49 33.4 16 17 54 17 34.5 34.9 26.6 3 13 50.8
11/4 115 14.3 15.9 88.9 15.9 4 59 42.2 19 21 56 21 43.2 43.7 35.1 5 14 63.5
11/2 125 15.9 17.5 984 15.9 4 65 48.3 21 22 60 22 49.5 50.0 40.9 6 16 73.0
2 150 17.5 19.1 120.7 19.1 4 78 6.0.3 24 25 62 25 61.9 62.5 52.5 8 17 92.1
2 1/2 180 20.7 22.3 139.7 19.1 4 90 73.0 27 29 68 29 74.6 75.4 62.7 8 19 104.8
3 190 22.3 23.9 152.4 19.1 4 108 88.9 29 30 68 30 90.7 91.4 77.9 10 21 127.0
31/2 215 22.3 23.9 177.8 19.1 8 122 101.6 30 32 70 32 103.4 104.1 90.1 10 - 139.7
4 230 22.3 23.9 190.5 19.1 8 135 114.3 32 33 75 33 116.1 116.8 102.9 11 - 157.2
5 255 22.3 23.9 215.9 22.3 8 164 141.3 35 36 87 36 143.8 144.4 128.2 11 - 185.7
6 280 23.9 25.4 241.3 22.3 8 192 168.3 38 40 87 40 170.7 171.4 154.1 13 - 215.9
8 345 27.0 28.6 298.2 22.3 8 246 219.1 43 44 100 44 221.5 222.2 202.7 13 - 269.9
10 4.5 28.6 30.2 362.0 25.4 12 3.5 273.0 48 49 100 49 276.2 277.4 254.6 13 - 323.8
12 845 3.2 31.8 431.8 25.4 12 365 323.8 54 55 113 55 327.0 328.2 304.8 13 - 381.0
14 535 33.4 35.0 476.3 28.6 12 400 355.6 56 79 125 57 359.2 360.2 To be Specified by Purchaser 13 - 412.8
16 595 35.0 36.6 539.8 28.6 16 457 406.4 62 87 125 64 410.5 411.2 13 - 469.9
18 635 38.1 39.7 577.9 31.8 16 505 457.0 67 97 138 68 461.8 462.3 13 - 533.4
20 700 41.3 42.9 635.0 31.8 20 559 508.0 71 103 143 73 513.1 514.4 13 - 584.2
24 815 46.1 47.7 749.3 35.0 20 663 610.0 81 111 151 83 616.0 616.0 13 - 692.2
Dimensions of Class 300 Flanges as Per Ansi B 16.5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Nominal Pipe Size
NPS 		Outside Diameter of Flange
O 		Thickness of Flange, Min.,
t1 		Drilling Diameter of Hub,
X 		Hub Diameter Begin- ning of Chamfer Welding Neck
A 		Lenght Thru Hub Threaded/ Lenght Threaded Min.
B 		Bore Comer Radius of Bore Lapped Flange and Pipe,
R 		Counter Bore Threaded FLANGE Min
Q 		Depth of Socket
D 		Diameter of RF,
R
Thickness Lap Joint Min.,
t1 		Diameter of Blot Circle
W 		Diameter of Blot
Holes 		Numbers
of Blots 		Threaded
/Slip-On
/Socket Welding,
Y 		Lapped
Y 		Welding,
Y 		Slip-On/ Socket Welding. Min.
B 		Lapped Min.
B 		Welding Neck/ Socket Welding B
(Note(2)
1/2 95 12.7 14.3 66.7 15.9 4 38 21.3 21 22 51 16 22.2 22.9 15.8 3 23.6 10 34.9
3/4 115 14.9 15.9 82.6 19.1 4 48 26.7 24 25 56 16 27.7 28.2 20.9 3 29.0 11 42.9
1 125 15.9 17.5 88.9 19.1 4 54 33.4 25 27 60 18 34.5 34.9 26.6 3 35.8 13 50.8
11/4 135 17.5 19.1 98.4 19.1 4 64 42.2 25 27 64 21 43.2 43.7 35.1 5 44.4 14 63.5
11/2 155 19.1 20.7 114.3 22.2 4 70 48.3 29 30 67 23 49.5 50.2 40.9 6 50.3 16 73.0
2 165 207 22.3 127.0 19.0 4 84 60.3 32 33 68 29 61.9 62.5 52.5 8 63.5 17 92.1
2 1/2 190 23.9 25.4 149.2 22.3 4 100 73.0 37 38 75 32 74.6 754 62.7 8 76.2 19 104.8
3 210 27.0 28.6 168.3 22.3 4 117 88.9 41 43 78 32 90.7 91.4 77.9 10 92.2 21 127.0
31/2 230 28.6 30.2 184.2 22.3 8 133 101.6 43 44 79 37 103.4 104.1 90.1 10 104.9 - 139.7
4 255 30.2 31.8 200.0 22.3 8 146 114.3 46 48 84 37 116.1 116.1 102.3 11 117.6 - 157.2
5 280 33.4 35.0 235.0 22.3 8 178 141.3 49 51 97 43 143.8 144.4 128.2 11 144.4 - 185.7
6 320 35.0 36.6 269.9 22.3 8 206 168.3 51 52 97 47 170.7 171.4 154.1 13 171.1 - 215.9
8 380 39.7 41.3 330.2 25.4 8 260 219.1 60 62 110 51 221.5 222.2 202.7 13 222.2 - 269.9
10 445 46.1 47.7 387.4 28.6 12 321 273.0 65 95 116 56 276.2 277.4 254.6 13 276.2 - 323.8
12 520 49.3 50.8 450.8 31.8 12 375 323.8 71 102 129 61 327.0 328.2 304.8 13 328.3 - 381.0
14 585 52.4 54.0 514.4 31.8 12 425 355.6 75 111 141 64 359.2 360.2 To be Specified by Purchaser 13 360.4 - 412.8
16 650 55.6 57.2 571.5 35.0 16 483 406.4 81 121 144 69 410.5 411.2 13 411.2 - 469.9
18 710 58.8 60.4 628.6 35.0 16 533 457.0 87 130 157 70 461.8 462.3 13 462.0 - 533.4
20 775 60.0 63.5 685.8 35.0 20 587 508.0 94 140 160 74 513.1 514.4 13 512 - 584.2
24 915 68.3 69.9 812.8 41.3 20 702 610.0 150 152 167 83 616.0 616.0 13 614.4 - 692.2

Note:

  1. 1. Height of RE 2mm
  2. 2. Dimensions column 16 Correspond to the inside diameters of pipe as given in ASME B36.10M for Standard Wall Pipe, 04 Thickness of Standard Wall is the same as Schedule 40 in Size NPS 10 and smaller. These bore size are furnished unless Otherwise specified by the Purchaser.
Dimensions of Class 600 Flanges as Per Ansi B 16.5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Nominal Pipe Size NPS Outside Diameter of
Flange
O 		Thickness of Flanges Min
f 		Diameter of Hub,
X 		Drilling Hub Diameter Begin- ning of Chamfer Welding Neck
A 		Length Thru Hub Threaded / Length Threaded Flange Min.,
T 		Bore Corner Radius of Bore of Lapped Flange and Pipe,
r 		Counter- Bore Threaded Flange Min.,
Q 		Diameter of RF
R 		Socket Weld D
Diameter of Bolt Circle
W 		Diameter of Bolt Holes
in 		Number of Bolts Threaded/ Slip-On
Y 		Lapped, Y Welding Neck Y Slip-On Min.,
B 		Lapped Min.,
B 		Welding Neck B
1/2 95 14.3 38 66.7 15.9 4 21.3 22 22 52 16 22.2 22.9 3 23.6 10 34.9
3/4 115 15.9 48 82.6 19.1 4 26.7 25 25 57 16 27.7 28.2 3 29.6 11 42.9
1 125 17.5 54 88.9 19.1 4 33.4 27 27 62 18 34.5 34.9 3 35.8 13 50.8
1 1/4 135 20.7 64 98.4 19.1 4 42.2 29 29 67 21 43.2 43.7 5 44.4 14 63.5
11/2 155 22.3 70 114.3 22.3 4 48.3 32 32 70 23 49.5 50.0 6 50.6 16 73.0
2 165 25.4 84 127.0 19.1 8 60.3 37 37 73 29 61.9 62.5 To be Specified by Purchaser 8 63.5 17 92.7
21/2 190 28.6 100 149.2 22.3 8 73.0 41 41 79 32 74.6 75.4 8 76.2 19 104.8
3 210 31.8 117 168.3 22.3 8 88.9 46 46 83 35 90.7 91.4 10 92.2 21 127.0
4 230 35.0 133 184.2 25.4 8 101.6 49 49 86 40 103.4 104.1 10 104.9 - 139.7
5 330 44.5 189 266.7 28.6 8 141.36 60 60 114 48 143.8 144.4 22 144.4 - 185.7
6 355 47.7 222 292.1 28.6 12 168.3 67 67 117 51 170.7 171.4 13 171.4 - 215.9
8 420 55.6 273 349.2 31.8 12 219.1 76 76 133 58 221.5 222.2 13 222.2 - 269.9
10 510 63.5 343 431.8 35.0 16 273.0 86 111 152 66 276.2 277.4 13 276.2 - 323.8
12 560 66.7 400 489.0 35.0 20 323.8 92 117 156 70 327.0 328.2 13 328.6 - 381.0
14 605 69.9 432 527.0 38.1 20 355.6 94 94 165 74 359.2 360.2 13 360.4 - 412.8
16 605 76.2 495 603.0 41.3 20 406.4 106 140 178 48 410.5 411.2 13 411.2 - 469.9
18 745 82.6 546 654.0 44.5 20 457.0 117 152 184 80 461.8 162.3 13 462.0 - 533.4
20 815 88.9 610 723.9 44.5 24 508.0 127 165 190 83 513.1 514.4 13 512.8 - 584.2
24 940 101.6 718 838.2 50.8 24 610.0 140 184 203 93 616.0 616.0 13 614.4 - 692.2

Note:

  1. 1. Height of 7mm
Dimensions of Class 1500 Flanges as Per Ansi B 16.5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Nominal Pipe Size NPS Outside Diameter of
Flange
O 		Thickness of Flanges Min
f 		Diameter of Hub,
X 		Drilling Hub Diameter Begin- ning of Chamfer Welding Neck
A 		Length Thru Hub Threaded / Length Threaded Flange Min.,
T 		Bore Corner Radius of Bore of Lapped Flange and Pipe,
r 		Counter- Bore Threaded Flange Min.,
Q 		Diameter of RF
R 		Socket Weld D
Diameter of Bolt Circle
W 		Diameter of Bolt Holes
in 		Number of Bolts Threaded/ Slip-On
Y 		Lapped, Y Welding Neck Y Slip-On Min.,
B 		Lapped Min.,
B 		Welding Neck B
1/2 121 22.3 38 82.6 22.3 4 21.3 32 32 60 23 22.2 22.9 3 23.6 10 34.9
3/4 130 25.4 44 88.9 22.3 4 26.7 35 35 70 26 27.7 28.2 3 29.0 11 42.9
1 149 28.6 52 101.6 25.4 4 33.4 41 41 73 29 34.5 34.9 3 35.8 13 50.8
1 1/4 159 28.6 64 111.1 254 4 42.2 41 41 73 31 43.2 43.7 5 44.4 14 63.5
11/2 178 31.8 70 123.8 28.6 4 48.3 44 44 83 32 49.5 50.0 6 50.6 16 73.0
2 216 38.1 105 165.1 25.4 8 60.3 57 57 102 39 61.9 62.5 To be Specified by Purchaser 8 63.5 17 92.1
21/2 244 41.3 124 190.5 28.6 8 73.0 64 64 105 48 74.6 75.4 8 76.2 19 104.8
3 267 47.7 133 203.2 31.8 8 88.9 - 73 117 - - 91.4 10 - - 127.0
4 311 54.0 162 241.3 35.0 8 114.3 - 90 124 - - 116.8 11 - - 139.7
5 375 73.1 197 292.1 41.3 8 141.36 - 105 156 - - 144.4 11 - - 157.2
6 394 82.6 229 317.5 38.1 12 168.3 - 119 171 - - 171.4 13 - - 215.9
8 483 92.1 292 393.7 44.5 12 219.1 - 143 213 - - 222.2 13 - - 269.9
10 584 108.0 368 482.6 50.8 12 273.0 - 178 254 - - 277.4 13 - - 323.8
12 673 123.9 451 571.5 54.0 16 323.8 - 219 283 - - 328.2 13 - - 381.0
14 749 133.4 495 635.0 60.7 16 355.6 - 241 298 - - 360.2 13 - - 412.8
16 826 146.1 552 704.8 66.7 16 406.4 - 260 311 - - 411.2 13 - - 469.9
18 914 162.0 597 774.7 73.0 16 457.0 - 276 327 - - 462.3 13 - - 533.4
20 984 177.8 641 831.8 79.4 16 508.0 - 292 356 - - 514.4 13 - - 584.2
24 1168 203.2 762 990.6 92.1 16 610.0 - 330 408 - - 616.0 13 - - 692.2

Note:

  1. 1. Height of 7mm

Dimensions of Flanges as Per Table BS-10

For Working Steam Pressure Upto 50 lbs Per sq. Inch
Nominal Pipe Size-1 O.D. of Pipe O.D. P.C.D. No. of Bolt Dia of Bolt Thickness
1/2" 21.3 95.3 66.7 4 12.7 4.8
3/4" 26.7 101.6 73.0 4 12.7 4.8
1" 33.4 114.3 82.6 4 12.7 4.8
11/4" 42.2 120.7 87.3 4 12.7 6.4
11/2" 48.3 133.4 98.4 4 12.7 6.4
2" 60.3 152.4 114.3 4 15.9 7.9
21/2" 73.0 165.1 127.0 4 15.9 7.9
3" 88.9 184.2 146.1 4 15.9 9.5
31/2" 101.6 203.2 165.1 4 15.9 9.5
4" 114.3 215.9 177.8 4 15.9 9.5
5" 141.3 254.0 209.6 8 15.9 12.7
6" 168.3 279.4 228.6 8 15.9 12.7
7" 190.5 304.8 260.4 8 15.9 12.7
8" 219.1 336.6 292.1 8 15.9 12.7
9" 244.5 368.3 323.9 8 15.9 15.9
10" 273.0 406.4 355.6 8 19.1 15.9
12" 323.9 457.2 406.4 12 19.1 15.9
14" 355.6 527.1 469.9 12 22.2 19.1
16" 406.4 577.9 520.7 12 22.2 19.1
18" 457.2 641.4 584.2 12 22.2 22.2
20" 508.0 704.9 641.4 16 22.5 25.4
24" 609.6 825.5 755.7 16 25.4 28.6
For Working Steam Pressure From 50 lbs to 100 lbs Per sq. Inch
Nominal Pipe Size-2 O.D. of Pipe O.D. P.C.D. No. of Bolt Dia of Bolt Thickness
1/2" 21.3 95.3 66.3 4 12.7 6.4
3/4" 26.7 101.6 73.0 4 12.7 6.4
1" 33.4 114.3 82.6 4 12.7 7.1
11/4" 42.2 120.7 87.3 4 12.7 7.9
11/2" 48.3 133.4 98.4 4 12.7 8.7
2" 60.3 152.4 114.3 4 15.9 9.5
21/2" 73.0 165.1 127.0 4 15.9 10.3
3" 88.9 184.2 146.1 4 15.9 11.1
31/2" 101.6 203.2 165.1 8 15.9 11.9
4" 114.3 215.9 177.8 8 15.9 12.7
5" 141.3 254.0 209.6 8 15.9 14.3
6" 168.3 279.4 228.6 8 19.1 17.5
7" 190.5 304.8 260.4 8 19.1 19.6
8" 219.1 336.6 292.1 8 19.1 19.6
9" 244.5 368.3 323.9 12 19.1 20.6
10" 273.0 406.4 355.6 12 19.1 22.2
12" 323.9 257.2 406.4 12 22.2 25.4
14" 355.6 527.1 469.9 12 22.2 25.4
16" 406.4 577.9 520.7 12 22.2 25.4
18" 457.2 641.4 584.2 16 22.2 28.6
20" 508.0 704.9 647.4 16 22.2 31.8
24" 609.6 825.5 755.7 16 25.4 38.1
For Working Steam Pressure From 100 lbs to 150 lbs Per sq. Inch
Nominal Pipe Size-3 O.D. of Pipe O.D. P.C.D. No. of Bolt Dia of Bolt Thickness
1/2" 21.3 95.3 66.7 4 12.7 9.5
3/4" 26.7 101.6 73.0 4 12.7 9.5
1" 33.4 120.7 87.3 4 15.9 9.5
11/4" 42.2 133.4 98.4 4 15.9 12.7
11/2" 48.3 139.7 104.8 4 15.9 12.7
2" 60.3 165.1 127.0 4 15.9 15.9
21/2" 73.0 184.2 146.1 8 15.9 15.9
3" 88.9 203.2 165.1 8 15.9 15.9
31/2" 101.6 215.9 177.8 8 15.9 19.1
4" 114.3 228.6 190.5 8 19.1 19.1
5" 141.3 279.4 235.0 8 19.1 22.2
6" 168.3 304.8 260.4 12 19.1 22.2
7" 190.5 336.6 292.1 12 19.1 22.2
8" 219.1 368.3 323.9 12 19.1 25.4
9" 244.5 406.4 355.6 12 22.2 25.4
10" 273.0 431.8 381.0 12 22.2 25.4
12" 323.9 489.0 438.2 16 22.2 28.6
14" 355.6 525.5 495.3 16 25.4 31.8
16" 406.4 609.6 552.5 20 25.4 31.8
18" 457.2 673.1 609.6 20 28.6 34.9
20" 508.0 736.6 673.1 24 28.6 38.1
24" 609.6 850.9 781.1 24 31.8 41.3
For Working Steam Pressure From 150 lbs to 250 lbs Per sq. Inch
Nominal Pipe Size-4 O.D. of Pipe O.D. P.C.D. No. of Bolt Dia of Bolt Thickness
1/2" 21.3 114.3 82.6 4 15.9 12.7
3/4" 26.7 114.3 82.6 4 15.9 12.7
1" 33.4 120.7 87.3 4 15.9 14.3
11/4" 42.2 133.4 98.4 4 15.9 17.5
11/2" 48.3 139.7 104.8 4 15.9 17.5
2" 60.3 165.1 127.0 4 15.9 19.1
21/2" 73.0 184.2 146.1 8 15.9 19.1
3" 88.9 203.2 165.1 8 15.9 22.2
31/2" 101.6 215.9 177.8 8 15.9 22.2
4" 114.3 228.6 190.5 8 15.9 25.4
5" 141.3 279.4 235.0 8 19.1 28.6
6" 168.3 302.8 260.4 12 19.1 28.6
7" 190.5 336.6 292.1 12 19.1 31.8
8" 219.1 368.3 323.9 12 19.1 31.8
9" 244.5 406.4 355.6 12 22.2 34.9
10" 273.0 431.8 381.0 12 22.2 34.9
12" 323.9 489.0 438.2 16 22.2 38.1
14" 355.6 552.5 495.3 16 25.4 41.3
16" 406.4 609.6 552.5 20 25.4 44.5
18" 457.2 673.1 609.6 20 28.6 47.6
20" 508.0 736.6 673.1 24 28.6 50.8
24" 609.6 850.9 781.1 24 31.8 57.2

Note:

  1. 1. For 12.7mm and 15.87mm Bolts Dia the Diameters of the Holes Will be 1.58mm Larger and for 19.01 and Above the Hole Dia Will be 3.17 Larger