Rajdhan is a major supplier and manufacturer of Carbon Steel Spectacle Blind Flanges in the Indian market.
Carbon Steel Figure-8 blind flanges, commonly referred to as Carbon Steel Spectacle Blind Flanges, are typically made Carbon Steel. Carbon Steel Spectacle Blind Flanges are often sandwiched between two gaskets and trimmed to fit between two pipe flanges. A common construction method for a Carbon Steel Spectacle Blind Flange involves joining two metal discs together with a thin piece of carbon steel. The moniker "spectacle blind" comes from the shape, which resembles a pair of glasses. The blind will have a solid end for blocking flow during maintenance and an opening on one end to enable flow through the pipe when it is in use. They are typically set up permanently to divide the pipe systems used in processes.
The moniker "spectacle blind" comes from the shape, which resembles a pair of glasses. The Carbon Steel Spectacle Blind Flange will have a solid end for blocking flow during maintenance and an opening on one end to enable flow through the pipe when it is in use. They are typically set up permanently to divide the pipe systems used in processes. The entire purpose of a Carbon Steel Spectacle Blind Flange is to ensure that there is no chance of any flow or leakage through a valve during maintenance and that an item of equipment is properly and securely blanked off. However, the flow cannot simply be bypassed around the blank because doing so would jeopardise the safety function of the Carbon Steel Spectacle Blind Flange. Instead, it can be diverted to other pieces of equipment. Before releasing the flange, bolts and swinging the blind, the flow must be valved off and the pressure released.
Specifications | ASTM A105, A694, A350 / ASME SA105, SA694, SA350 |
Dimensions | ANSI B16.5, ANSI B16.48 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings |
Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
Size | 1/2" (15 NB) to 48" (1200NB) |
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 |
Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
Call us to get the latest price list for Carbon Steel Spectacle Blind Flanges in Mumbai, Maharashtra. We have special offers available for CS Spectacle Blind Flange with the best price.
Size in Inch | Size in MM | Internal Dia. | Outer Dia. | Center to Center | Thick. | Web Width | Web Thick. | Hole Dia | Spec. Blind Weight in Kg | Paddle Blank Weight in kg | Paddle Spacer Blank Weight in kg |
1/2 | 15 | 16 | 45 | 60 | 3 | 38 | 2 | 15.875 | 0.07 | 0.03 | 0.03 |
3/4 | 20 | 21 | 54 | 70 | 3 | 38 | 2 | 15.875 | 0.1 | 0.05 | 0.04 |
1 | 25 | 27 | 64 | 80 | 3 | 38 | 2 | 15.875 | 0.14 | 0.07 | 0.06 |
1 1/4 | 32 | 42 | 73 | 90 | 6.4 | 38 | 4 | 15.875 | 0.35 | 0.21 | 0.14 |
1 1/2 | 40 | 48 | 83 | 100 | 6.4 | 38 | 4 | 15.875 | 0.46 | 0.27 | 0.18 |
2 | 50 | 61 | 102 | 120 | 6.4 | 51 | 4 | 19.05 | 0.68 | 0.41 | 0.26 |
2 1/2 | 65 | 73 | 107 | 140 | 6.4 | 51 | 4 | 19.05 | 0.7 | 0.46 | 0.24 |
3 | 80 | 89 | 133 | 150 | 6.4 | 64 | 4 | 19.05 | 1.1 | 0.71 | 0.39 |
3 1/2 | 90 | 102 | 159 | 175 | 9.7 | 64 | 5 | 19.05 | 2.44 | 1.54 | 0.9 |
4 | 100 | 114 | 172 | 190 | 9.7 | 64 | 5 | 19.05 | 2.81 | 1.8 | 1.01 |
5 | 130 | 141 | 194 | 215 | 9.7 | 76 | 5 | 22.225 | 3.37 | 2.29 | 1.08 |
6 | 150 | 168 | 219 | 240 | 12.7 | 76 | 7 | 22.225 | 5.39 | 3.82 | 1.57 |
8 | 200 | 219 | 276 | 300 | 12.7 | 76 | 10 | 22.225 | 8.32 | 6.07 | 2.25 |
10 | 250 | 273 | 337 | 360 | 15.7 | 102 | 12 | 25.4 | 15.04 | 11.19 | 3.84 |
12 | 300 | 324 | 406 | 430 | 19.1 | 102 | 15 | 25.4 | 26.95 | 19.77 | 7.18 |
14 | 350 | 356 | 448 | 475 | 19.1 | 108 | 15 | 28.575 | 32.94 | 24.07 | 8.87 |
16 | 400 | 406 | 511 | 540 | 22.4 | 108 | 17 | 28.575 | 50.27 | 36.73 | 13.54 |
18 | 450 | 457 | 546 | 580 | 25.4 | 114 | 20 | 31.75 | 61.79 | 47.55 | 14.23 |
20 | 500 | 508 | 603 | 635 | 28.4 | 121 | 22 | 31.75 | 83.67 | 64.85 | 18.82 |
24 | 600 | 610 | 714 | 750 | 31.8 | 140 | 24 | 34.925 | 129.3 | 101.8 | 27.49 |
Size in Inch | Size in MM | Internal Dia. | Outer Dia. | Center to Center | Thick. | Web Width | Web Thick. | Hole Dia | Spec. Blind Weight in Kg | Paddle Blank Weight in kg | Paddle Spacer Blank Weight in kg |
1/2 | 15 | 16 | 51 | 65 | 6.4 | 38 | 4 | 15.875 | 0.19 | 0.1 | 0.09 |
3/4 | 20 | 21 | 64 | 80 | 6.4 | 38 | 4 | 19.05 | 0.31 | 0.16 | 0.14 |
1 | 25 | 27 | 70 | 90 | 6.4 | 38 | 4 | 19.05 | 0.36 | 0.19 | 0.16 |
1 1/4 | 32 | 42 | 79 | 100 | 6.4 | 38 | 4 | 19.05 | 0.43 | 0.25 | 0.17 |
1 1/2 | 40 | 48 | 92 | 115 | 6.4 | 38 | 4 | 22.225 | 0.58 | 0.34 | 0.24 |
2 | 50 | 61 | 108 | 125 | 9.7 | 51 | 5 | 19.05 | 1.19 | 0.71 | 0.48 |
2 1/2 | 65 | 73 | 127 | 150 | 9.7 | 51 | 5 | 22.225 | 1.64 | 0.98 | 0.65 |
3 | 80 | 89 | 146 | 170 | 9.7 | 64 | 5 | 22.225 | 2.11 | 1.29 | 0.81 |
3 1/2 | 90 | 102 | 162 | 185 | 12.7 | 64 | 7 | 22.225 | 3.35 | 2.09 | 1.26 |
4 | 100 | 114 | 178 | 200 | 12.7 | 64 | 7 | 22.225 | 4.01 | 2.52 | 1.49 |
5 | 130 | 141 | 213 | 235 | 15.7 | 76 | 8 | 22.225 | 6.98 | 4.47 | 2.51 |
6 | 150 | 168 | 248 | 270 | 15.7 | 76 | 8 | 22.225 | 9.34 | 6.06 | 3.28 |
8 | 200 | 219 | 305 | 330 | 22.4 | 76 | 17 | 25.4 | 19.42 | 13.08 | 6.33 |
10 | 250 | 273 | 359 | 385 | 25.4 | 102 | 20 | 28.575 | 29.22 | 20.55 | 8.66 |
12 | 300 | 324 | 419 | 450 | 28.4 | 102 | 22 | 31.75 | 43.9 | 31.31 | 12.58 |
14 | 350 | 356 | 483 | 515 | 31.8 | 108 | 24 | 31.75 | 67.86 | 46.58 | 21.27 |
16 | 400 | 406 | 536 | 570 | 38.1 | 108 | 29 | 34.925 | 98.04 | 68.74 | 29.3 |
18 | 450 | 457 | 594 | 630 | 41.1 | 114 | 31 | 34.925 | 128.23 | 91.06 | 37.16 |
20 | 500 | 508 | 651 | 685 | 44.5 | 121 | 34 | 34.925 | 164.75 | 118.43 | 46.31 |
24 | 600 | 610 | 772 | 810 | 50.8 | 140 | 39 | 41.275 | 261.55 | 190.13 | 71.42 |
Size in Inch | Size in MM | Internal Dia. | Outer Dia. | Center to Center | Thick. | Web Width | Web Thick. | Hole Dia | Spec. Blind Weight in Kg | Paddle Blank Weight in kg | Paddle Spacer Blank Weight in kg |
1/2 | 15 | 16 | 51 | 65 | 6.4 | 38 | 4 | 15.875 | 0.19 | 0.1 | 0.09 |
3/4 | 20 | 21 | 64 | 80 | 6.4 | 38 | 4 | 19.05 | 0.31 | 0.16 | 0.14 |
1 | 25 | 27 | 70 | 90 | 6.4 | 57 | 4 | 19.05 | 0.36 | 0.19 | 0.16 |
1 1/4 | 32 | 37 | 79 | 100 | 9.7 | 57 | 5 | 19.05 | 0.67 | 0.38 | 0.29 |
1 1/2 | 40 | 43 | 92 | 115 | 9.7 | 67 | 5 | 22.225 | 0.91 | 0.51 | 0.4 |
2 | 50 | 55 | 108 | 125 | 9.7 | 57 | 5 | 19.05 | 1.23 | 0.71 | 0.52 |
2 1/2 | 65 | 67 | 127 | 150 | 12.7 | 67 | 7 | 22.225 | 2.21 | 1.28 | 0.92 |
3 | 80 | 83 | 146 | 170 | 12.7 | 67 | 7 | 22.225 | 2.85 | 1.7 | 1.15 |
3 1/2 | 90 | 96 | 159 | 185 | 15.7 | 76 | 8 | 25.4 | 4.07 | 2.49 | 1.58 |
4 | 100 | 108 | 191 | 215 | 15.7 | 76 | 8 | 25.4 | 6.04 | 3.59 | 2.44 |
5 | 130 | 135 | 238 | 265 | 19.1 | 86 | 10 | 28.575 | 11.4 | 6.79 | 4.6 |
6 | 150 | 162 | 264 | 290 | 22.4 | 86 | 12 | 28.575 | 15.91 | 9.8 | 6.11 |
8 | 200 | 212 | 318 | 350 | 28.4 | 95 | 22 | 31.75 | 28.05 | 18.03 | 10.01 |
10 | 250 | 265 | 397 | 430 | 35.1 | 105 | 27 | 34.925 | 54 | 34.74 | 19.26 |
12 | 300 | 315 | 454 | 490 | 41.1 | 105 | 31 | 34.925 | 80.78 | 53.2 | 27.58 |
14 | 350 | 346 | 489 | 525 | 44.5 | 114 | 34 | 38.1 | 100.19 | 66.82 | 33.36 |
16 | 400 | 397 | 562 | 605 | 50.8 | 124 | 39 | 41.275 | 151.24 | 100.76 | 50.48 |
18 | 450 | 448 | 610 | 655 | 53.8 | 133 | 41 | 44.45 | 183.62 | 125.71 | 57.9 |
20 | 500 | 497 | 679 | 725 | 63.5 | 133 | 48 | 44.45 | 269.2 | 183.85 | 85.35 |
24 | 600 | 597 | 787 | 840 | 73.2 | 152 | 55 | 50.8 | 405.6 | 284.72 | 120.88 |
Size in Inch | Size in MM | Internal Dia. | Outer Dia. | Center to Center | Thick. | Web Width | Web Thick. | Hole Dia | Spec. Blind Weight in Kg | Paddle Blank Weight in kg | Paddle Spacer Blank Weight in kg |
1/2 | 15 | 16 | 60 | 80 | 6.4 | 38 | 4 | 22.225 | 0.27 | 0.14 | 0.13 |
3/4 | 20 | 21 | 67 | 90 | 6.4 | 41 | 4 | 22.225 | 0.34 | 0.18 | 0.16 |
1 | 25 | 27 | 76 | 100 | 6.4 | 57 | 4 | 25.4 | 0.43 | 0.23 | 0.2 |
1 1/4 | 32 | 37 | 86 | 110 | 9.7 | 57 | 5 | 25.4 | 0.81 | 0.45 | 0.36 |
1 1/2 | 40 | 43 | 95 | 125 | 9.7 | 67 | 5 | 28.575 | 0.98 | 0.54 | 0.43 |
2 | 50 | 55 | 140 | 165 | 12.7 | 57 | 7 | 25.4 | 2.88 | 1.56 | 1.32 |
2 1/2 | 65 | 67 | 162 | 190 | 12.7 | 67 | 7 | 28.575 | 3.82 | 2.09 | 1.73 |
3 | 80 | 83 | 165 | 190 | 15.7 | 67 | 8 | 25.4 | 4.68 | 2.68 | 2 |
4 | 100 | 108 | 203 | 235 | 19.1 | 76 | 10 | 31.75 | 8.48 | 4.94 | 3.54 |
5 | 130 | 135 | 244 | 280 | 22.4 | 86 | 12 | 34.925 | 14.18 | 8.37 | 5.81 |
6 | 150 | 162 | 286 | 320 | 25.4 | 86 | 13 | 31.75 | 21.9 | 13.04 | 8.86 |
8 | 200 | 212 | 356 | 395 | 35.1 | 95 | 27 | 38.1 | 45.96 | 27.93 | 18.02 |
10 | 250 | 265 | 432 | 470 | 41.1 | 105 | 31 | 38.1 | 78.21 | 48.16 | 30.04 |
12 | 300 | 315 | 495 | 535 | 47.8 | 105 | 36 | 38.1 | 117.31 | 73.55 | 43.76 |
14 | 350 | 346 | 518 | 560 | 53.8 | 114 | 41 | 41.275 | 140.86 | 90.65 | 50.2 |
16 | 400 | 397 | 572 | 615 | 60.5 | 124 | 46 | 44.45 | 188.73 | 124.31 | 64.42 |
18 | 450 | 448 | 635 | 685 | 66.5 | 133 | 50 | 50.8 | 252.97 | 168.39 | 84.57 |
20 | 500 | 497 | 696 | 750 | 73.2 | 133 | 55 | 53.975 | 331.81 | 222.68 | 109.13 |
24 | 600 | 597 | 835 | 900 | 88.9 | 152 | 67 | 66.675 | 579.52 | 389.25 | 190.27 |
Size in Inch | Size in MM | Internal Dia. | Outer Dia. | Center to Center | Thick. | Web Width | Web Thick. | Hole Dia | Spec. Blind Weight in Kg | Paddle Blank Weight in kg | Paddle Spacer Blank Weight in kg |
1/2 | 15 | 16 | 61 | 80 | 6.4 | 38 | 4 | 22.225 | 0.28 | 0.14 | 0.13 |
3/4 | 20 | 21 | 67 | 90 | 9.7 | 41 | 5 | 22.225 | 0.52 | 0.27 | 0.24 |
1 | 25 | 27 | 76 | 100 | 9.7 | 64 | 5 | 25.4 | 0.65 | 0.35 | 0.3 |
1 1/4 | 32 | 35 | 86 | 110 | 9.7 | 64 | 5 | 25.4 | 0.82 | 0.45 | 0.37 |
1 1/2 | 40 | 41 | 95 | 125 | 12.7 | 70 | 7 | 28.575 | 1.3 | 0.71 | 0.58 |
2 | 50 | 53 | 140 | 165 | 12.7 | 70 | 7 | 25.4 | 2.9 | 1.56 | 1.33 |
2 1/2 | 65 | 63 | 162 | 190 | 15.7 | 76 | 8 | 28.575 | 4.78 | 2.58 | 2.19 |
3 | 80 | 78 | 172 | 205 | 19.1 | 76 | 10 | 31.75 | 6.36 | 3.54 | 2.81 |
4 | 100 | 102 | 206 | 240 | 22.4 | 89 | 12 | 34.925 | 10.47 | 5.96 | 4.5 |
5 | 130 | 128 | 251 | 290 | 28.4 | 89 | 15 | 41.275 | 19.55 | 11.23 | 8.31 |
6 | 150 | 154 | 279 | 320 | 35.1 | 89 | 18 | 38.1 | 29.08 | 17.15 | 11.93 |
8 | 200 | 203 | 349 | 395 | 41.1 | 102 | 31 | 44.45 | 52.23 | 31.43 | 20.8 |
10 | 250 | 255 | 432 | 480 | 50.8 | 114 | 39 | 50.8 | 98.33 | 59.53 | 38.79 |
12 | 300 | 303 | 518 | 570 | 60.5 | 114 | 46 | 53.975 | 169.01 | 101.94 | 67.06 |
14 | 350 | 333 | 575 | 635 | 66.5 | 127 | 50 | 60.325 | 229.84 | 138.07 | 91.76 |
16 | 400 | 381 | 638 | 705 | 76.2 | 133 | 58 | 66.675 | 320.1 | 194.78 | 125.32 |
18 | 450 | 429 | 702 | 775 | 85.9 | 146 | 65 | 73.025 | 432.4 | 265.84 | 166.56 |
20 | 500 | 478 | 752 | 830 | 95.3 | 152 | 72 | 79.375 | 540.14 | 338.44 | 201.7 |
24 | 600 | 575 | 899 | 990 | 111.3 | 178 | 84 | 92.075 | 898.71 | 564.9 | 333.8 |
Size in Inch | Size in MM | Internal Dia. | Outer Dia. | Center to Center | Thick. | Web Width | Web Thick. | Hole Dia | Spec. Blind Weight in Kg | Paddle Blank Weight in kg | Paddle Spacer Blank Weight in kg |
1/2 | 15 | 16 | 67 | 90 | 9.7 | 38 | 5 | 22.225 | 0.53 | 0.27 | 0.25 |
3/4 | 20 | 21 | 73 | 95 | 9.7 | 41 | 5 | 22.225 | 0.62 | 0.32 | 0.29 |
1 | 25 | 27 | 83 | 110 | 9.7 | 64 | 5 | 25.4 | 0.79 | 0.41 | 0.37 |
1 1/4 | 32 | 35 | 102 | 130 | 12.7 | 64 | 7 | 28.575 | 1.56 | 0.82 | 0.73 |
1 1/2 | 40 | 41 | 114 | 145 | 15.7 | 70 | 8 | 31.75 | 2.39 | 1.28 | 1.11 |
2 | 50 | 53 | 143 | 170 | 15.7 | 70 | 8 | 28.575 | 3.75 | 2.01 | 1.73 |
2 1/2 | 65 | 63 | 165 | 195 | 19.1 | 76 | 10 | 31.75 | 6.05 | 3.26 | 2.78 |
3 | 80 | 78 | 194 | 230 | 22.4 | 76 | 12 | 34.925 | 9.73 | 5.29 | 4.43 |
4 | 100 | 102 | 232 | 275 | 28.4 | 89 | 22 | 41.275 | 17.34 | 9.59 | 7.74 |
5 | 130 | 128 | 276 | 325 | 35.1 | 89 | 27 | 47.625 | 29.97 | 16.79 | 13.17 |
6 | 150 | 154 | 314 | 370 | 41.1 | 89 | 31 | 53.975 | 44.77 | 25.44 | 19.32 |
8 | 200 | 198 | 384 | 440 | 53.8 | 102 | 41 | 53.975 | 86.39 | 49.82 | 36.57 |
10 | 250 | 248 | 473 | 540 | 66.5 | 114 | 50 | 66.675 | 161.18 | 93.43 | 67.74 |
12 | 300 | 289 | 546 | 620 | 79.2 | 114 | 60 | 73.025 | 255.01 | 148.27 | 106.73 |
ominal Size | Outside diameter of flange | Diameter of bolt hole centre circle | Diamter of bolt hole | Number of bolt | Nominal desig-nation of thread of bolt |
Inside diameter | Inside diameter | Depth of socket | Thickness of Flange | Diameter of hub Small diameter side | Diameter of hub Large diamter side | Totle length of flange | Radius of fillet |
A | D | C | h | d0 | d(18) | S | t | a | b | T | r | ||
10 15 20 |
90 95 100 |
65 70 75 |
15 15 15 |
4 4 4 |
M12 M12 M12 |
17.8 22.2 27.7 |
12.7 16.1 21.6 |
10 10 13 |
12 12 14 |
23 27 33 |
26 30 36 |
16 16 20 |
4 4 4 |
25 32 40 |
125 135 140 |
90 100 105 |
19 19 19 |
4 4 4 |
M16 M16 M16 |
34.5 43.2 49.1 |
27.6 35.7 41.6 |
13 13 13 |
14 16 16 |
41 50 56 |
44 53 60 |
20 22 24 |
4 4 4 |
50 65 80 |
155 175 185 |
120 140 150 |
19 19 19 |
4 4 8 |
M16 M16 M16 |
61.1 77.1 90.0 |
52.9 67.9 80.7 |
16 16 16 |
16 18 18 |
69 86 99 |
73 91 105 |
24 27 30 |
4 4 4 |
Flanges pressure rating in psig for Spectacle Blind Flange ASME |
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Temperature (F°) | 150# | 300# | 400# | 600# | 900# | 1500# | 2500# |
-20 to 100 | 285 | 740 | 985 | 1480 | 2220 | 3705 | 6170 |
200 | 260 | 680 | 905 | 1360 | 2035 | 3395 | 5655 |
300 | 230 | 655 | 870 | 1310 | 1965 | 3270 | 5450 |
400 | 200 | 635 | 845 | 1265 | 1900 | 3170 | 5280 |
500 | 170 | 605 | 805 | 1205 | 1810 | 3015 | 5025 |
600 | 140 | 570 | 755 | 1135 | 1705 | 2840 | 4730 |
650 | 125 | 550 | 730 | 1100 | 1650 | 2745 | 4575 |
700 | 110 | 530 | 710 | 1060 | 1590 | 2655 | 4425 |
750 | 95 | 505 | 675 | 1015 | 1520 | 2535 | 4230 |
800 | 80 | 410 | 550 | 825 | 1235 | 2055 | 3430 |
850 | 65 | 320 | 425 | 640 | 955 | 1595 | 2655 |
900 | 50 | 230 | 305 | 460 | 690 | 1150 | 1915 |
950 | 35 | 135 | 185 | 275 | 410 | 685 | 1145 |
1000 | 20 | 85 | 115 | 170 | 255 | 430 | 715 |
high quality carbon steel spectacle blind flanges | FOB Price: US $0.35-1200 / Piece |
astm a350 lf2 low temperature carbon steel spectacle blind flange | FOB Price: US $3.8-700 / Piece |
ansi b16.5 carbon steel class 2500 spectacle blind flanges | FOB Price: US $0.20-1300 / Piece |
carbon steel asme b16.48 spectacle blind flange | FOB Price: US $1400-1100 / Ton |
astm a105 class 1500lbs spectacle blind flange | FOB Price: US $900-1300 / Ton |
astm a350 lf6 ltcs spectacle blind flanges | FOB Price: US $0.9-800 / Piece |
asme b16.5 high yield cs spectacle blind flanges | FOB Price: US $1200-8000 / Ton |
asme b16.5 class 300 carbon steel spectacle blind flanges | FOB Price: US $6-9 / Piece |
astm a694 grade f65 spectacle blind flange manufacturer | FOB Price: US $7.20-5.25 / Kilogram |
carbon steel a105 raised face spectacle blind flange | FOB Price: US $0.17-1500 / Piece |
raised face (rf) carbon steel spectacle blind flange | FOB Price: US $5-15 / Kilogram |
different sizes of carbon steel spectacle blind flanges | FOB Price: US $0.27-1800 / Piece |
low temperature steel a350 lf3 spectacle blind flange | FOB Price: US $0.7-1200 / Piece |