ASME B16.48 spectacle blind flange is a special type of flange that looks like a spectacle and is used to open and close pipe lines. R.C. Metal Corporation is a leading manufacturer and supplier of the Spacer & Blind ASME B16 48 in different dimensions. The standard covers flanges ranging from ½ inches to 24 inches. There are different pressure classes ranging from 150 through 2500. The ANSI B16.48 Spectacle Flange has a plate and a ring joint parallel to each other. The plate can close the pipe completely and the ring stays on the outer diameter of the pipe allowing for full flow of the fluids. The Spectacle Blind Flange ASME B16.48 is used in systems that need regular opening and closing of the pipe lines.
Only one point of the flange has to be permanently connected to the pipes and the Piping Spectacle Blind Flange can rotate around that permanent axis to place the plate or ring over the diameter of the pipe. There are different types such as the Spectacle Blind Flange Raised Face which has more surface for connection. There are also different pressure numbers to rate the pressure capacities. The PN16 Spectacle Blind Flange has a lower pressure capacity where there are PN numbers ranging from PN6 through PN64.
Due to the shape of number 8, the flanges are also known as Spectacle blind flange figure 8. The flanges can be forged, threaded or screwed in production. They can also be made as flat face or raised face and in different material grades. The Spectacle blind flange flat face is mostly produced in 304 austenitic stainless steel for the strength and low cost but other material made flanges are also available. The Spectacle Blind Flange Class 150 is one of the lowest pressure ratings of the flanges. Please feel free to contact us for more information on the flanges such as the PN10 Blind Spectacle Flange and the different variations along with price list.
Size in inch. | Size in mm | O.D. | I.D. | Thick. | Center to Center | Web Thick. | Web Width | Paddle Blank Weight in Kilogram | Hole Diameter | Spectacle Blind Weight in Kg | Paddle Spacer Blank Weight in Kg |
1/2 | 15 | 45 | 16 | 3 | 60 | 2 | 38 | 0.03 | 15.875 | 0.07 | 0.03 |
3/4 | 20 | 54 | 21 | 3 | 70 | 2 | 38 | 0.05 | 15.875 | 0.1 | 0.04 |
1 | 25 | 64 | 27 | 3 | 80 | 2 | 38 | 0.07 | 15.875 | 0.14 | 0.06 |
1 1/4 | 32 | 73 | 42 | 6.4 | 90 | 4 | 38 | 0.21 | 15.875 | 0.35 | 0.14 |
1 1/2 | 40 | 83 | 48 | 6.4 | 100 | 4 | 38 | 0.27 | 15.875 | 0.46 | 0.18 |
2 | 50 | 102 | 61 | 6.4 | 120 | 4 | 51 | 0.41 | 19.05 | 0.68 | 0.26 |
2 1/2 | 65 | 107 | 73 | 6.4 | 140 | 4 | 51 | 0.46 | 19.05 | 0.7 | 0.24 |
3 | 80 | 133 | 89 | 6.4 | 150 | 4 | 64 | 0.71 | 19.05 | 1.1 | 0.39 |
3 1/2 | 90 | 159 | 102 | 9.7 | 175 | 5 | 64 | 1.54 | 19.05 | 2.44 | 0.9 |
4 | 100 | 172 | 114 | 9.7 | 190 | 5 | 64 | 1.8 | 19.05 | 2.81 | 1.01 |
5 | 130 | 194 | 141 | 9.7 | 215 | 5 | 76 | 2.29 | 22.225 | 3.37 | 1.08 |
6 | 150 | 219 | 168 | 12.7 | 240 | 7 | 76 | 3.82 | 22.225 | 5.39 | 1.57 |
8 | 200 | 276 | 219 | 12.7 | 300 | 10 | 76 | 6.07 | 22.225 | 8.32 | 2.25 |
10 | 250 | 337 | 273 | 15.7 | 360 | 12 | 102 | 11.19 | 25.4 | 15.04 | 3.84 |
12 | 300 | 406 | 324 | 19.1 | 430 | 15 | 102 | 19.77 | 25.4 | 26.95 | 7.18 |
14 | 350 | 448 | 356 | 19.1 | 475 | 15 | 108 | 24.07 | 28.575 | 32.94 | 8.87 |
16 | 400 | 511 | 406 | 22.4 | 540 | 17 | 108 | 36.73 | 28.575 | 50.27 | 13.54 |
18 | 450 | 546 | 457 | 25.4 | 580 | 20 | 114 | 47.55 | 31.75 | 61.79 | 14.23 |
20 | 500 | 603 | 508 | 28.4 | 635 | 22 | 121 | 64.85 | 31.75 | 83.67 | 18.82 |
24 | 600 | 714 | 610 | 31.8 | 750 | 24 | 140 | 101.8 | 34.925 | 129.3 | 27.49 |
Specifications | ASME B16.48 Spectacle Blind Flange |
---|---|
Standards | ASME | BS | DIN | ANSI | GOST | EN Flange |
Size Ranges | From 1/2 inch (i.e. 15 NB) upto 48 inch (i.e. 1200NB) |
UNI/ DIN / EN Standard | 6Bar, 10 Bar, 16Bar, 25 Bar, 40Bar |
Production Process | Heat Treated, Forged, Machined |
Flanges Face Type | FF, RF, LMF, SMF, RTJ, LJF. |
JIS Standards | 5 K, 10K, 16K, 20 K, 30K, 40K, 63 K |
Pressure Classes | Cl 150, Class 300, Cl. 400, 600, Class 900, Cl 1500 and 2500 |
Size in Millimeter | Size in In. | Outer Dia. | I.D. | Thk. | Center to Center | Web Thick. | Web Width | Hole Dia. | Spectacle Blind Weight in Kilogram | Paddle Spacer Blank Weight in Kilogram | Paddle Blank Weight in Kilogram |
15 | 1/2 | 51 | 16 | 6.4 | 65 | 4 | 38 | 15.875 | 0.19 | 0.09 | 0.1 |
20 | 3/4 | 64 | 21 | 6.4 | 80 | 4 | 38 | 19.05 | 0.31 | 0.14 | 0.16 |
25 | 1 | 70 | 27 | 6.4 | 90 | 4 | 38 | 19.05 | 0.36 | 0.16 | 0.19 |
32 | 1 1/4 | 79 | 42 | 6.4 | 100 | 4 | 38 | 19.05 | 0.43 | 0.17 | 0.25 |
40 | 1 1/2 | 92 | 48 | 6.4 | 115 | 4 | 38 | 22.225 | 0.58 | 0.24 | 0.34 |
50 | 2 | 108 | 61 | 9.7 | 125 | 5 | 51 | 19.05 | 1.19 | 0.48 | 0.71 |
65 | 2 1/2 | 127 | 73 | 9.7 | 150 | 5 | 51 | 22.225 | 1.64 | 0.65 | 0.98 |
80 | 3 | 146 | 89 | 9.7 | 170 | 5 | 64 | 22.225 | 2.11 | 0.81 | 1.29 |
90 | 3 1/2 | 162 | 102 | 12.7 | 185 | 7 | 64 | 22.225 | 3.35 | 1.26 | 2.09 |
100 | 4 | 178 | 114 | 12.7 | 200 | 7 | 64 | 22.225 | 4.01 | 1.49 | 2.52 |
130 | 5 | 213 | 141 | 15.7 | 235 | 8 | 76 | 22.225 | 6.98 | 2.51 | 4.47 |
150 | 6 | 248 | 168 | 15.7 | 270 | 8 | 76 | 22.225 | 9.34 | 3.28 | 6.06 |
200 | 8 | 305 | 219 | 22.4 | 330 | 17 | 76 | 25.4 | 19.42 | 6.33 | 13.08 |
250 | 10 | 359 | 273 | 25.4 | 385 | 20 | 102 | 28.575 | 29.22 | 8.66 | 20.55 |
300 | 12 | 419 | 324 | 28.4 | 450 | 22 | 102 | 31.75 | 43.9 | 12.58 | 31.31 |
350 | 14 | 483 | 356 | 31.8 | 515 | 24 | 108 | 31.75 | 67.86 | 21.27 | 46.58 |
400 | 16 | 536 | 406 | 38.1 | 570 | 29 | 108 | 34.925 | 98.04 | 29.3 | 68.74 |
450 | 18 | 594 | 457 | 41.1 | 630 | 31 | 114 | 34.925 | 128.23 | 37.16 | 91.06 |
500 | 20 | 651 | 508 | 44.5 | 685 | 34 | 121 | 34.925 | 164.75 | 46.31 | 118.43 |
600 | 24 | 772 | 610 | 50.8 | 810 | 39 | 140 | 41.275 | 261.55 | 71.42 | 190.13 |
Size in mm | Size in inches | Outer Diam. | I.D. | Center to Center | Web Width | Thick. | Web Thickness | Hole Dia | Paddle Blank Weight in Kilogram | Spectacle Blind Weight in Kilogram | Paddle Spacer Blank Weight in Kilogram |
15 | 1/2 | 51 | 16 | 65 | 38 | 6.4 | 4 | 15.875 | 0.1 | 0.19 | 0.09 |
20 | 3/4 | 64 | 21 | 80 | 38 | 6.4 | 4 | 19.05 | 0.16 | 0.31 | 0.14 |
25 | 1 | 70 | 27 | 90 | 57 | 6.4 | 4 | 19.05 | 0.19 | 0.36 | 0.16 |
32 | 1 1/4 | 79 | 37 | 100 | 57 | 9.7 | 5 | 19.05 | 0.38 | 0.67 | 0.29 |
40 | 1 1/2 | 92 | 43 | 115 | 67 | 9.7 | 5 | 22.225 | 0.51 | 0.91 | 0.4 |
50 | 2 | 108 | 55 | 125 | 57 | 9.7 | 5 | 19.05 | 0.71 | 1.23 | 0.52 |
65 | 2 1/2 | 127 | 67 | 150 | 67 | 12.7 | 7 | 22.225 | 1.28 | 2.21 | 0.92 |
80 | 3 | 146 | 83 | 170 | 67 | 12.7 | 7 | 22.225 | 1.7 | 2.85 | 1.15 |
90 | 3 1/2 | 159 | 96 | 185 | 76 | 15.7 | 8 | 25.4 | 2.49 | 4.07 | 1.58 |
100 | 4 | 191 | 108 | 215 | 76 | 15.7 | 8 | 25.4 | 3.59 | 6.04 | 2.44 |
130 | 5 | 238 | 135 | 265 | 86 | 19.1 | 10 | 28.575 | 6.79 | 11.4 | 4.6 |
150 | 6 | 264 | 162 | 290 | 86 | 22.4 | 12 | 28.575 | 9.8 | 15.91 | 6.11 |
200 | 8 | 318 | 212 | 350 | 95 | 28.4 | 22 | 31.75 | 18.03 | 28.05 | 10.01 |
250 | 10 | 397 | 265 | 430 | 105 | 35.1 | 27 | 34.925 | 34.74 | 54 | 19.26 |
300 | 12 | 454 | 315 | 490 | 105 | 41.1 | 31 | 34.925 | 53.2 | 80.78 | 27.58 |
350 | 14 | 489 | 346 | 525 | 114 | 44.5 | 34 | 38.1 | 66.82 | 100.19 | 33.36 |
400 | 16 | 562 | 397 | 605 | 124 | 50.8 | 39 | 41.275 | 100.76 | 151.24 | 50.48 |
450 | 18 | 610 | 448 | 655 | 133 | 53.8 | 41 | 44.45 | 125.71 | 183.62 | 57.9 |
500 | 20 | 679 | 497 | 725 | 133 | 63.5 | 48 | 44.45 | 183.85 | 269.2 | 85.35 |
600 | 24 | 787 | 597 | 840 | 152 | 73.2 | 55 | 50.8 | 284.72 | 405.6 | 120.88 |
Size in In. | Size in Millimeter | Center to Center | Internal Dia. | O.D. | Hole Dia | Web Thick. | Web Width | Spectacle Blind Weight in Kilogram | Paddle Spacer Blank Weight in Kilogram | Paddle Blank Weight in Kilogram |
1/2 | 15 | 80 | 16 | 60 | 22.225 | 4 | 38 | 0.27 | 0.13 | 0.14 |
3/4 | 20 | 90 | 21 | 67 | 22.225 | 4 | 41 | 0.34 | 0.16 | 0.18 |
1 | 25 | 100 | 27 | 76 | 25.4 | 4 | 57 | 0.43 | 0.2 | 0.23 |
1 1/4 | 32 | 110 | 37 | 86 | 25.4 | 5 | 57 | 0.81 | 0.36 | 0.45 |
1 1/2 | 40 | 125 | 43 | 95 | 28.575 | 5 | 67 | 0.98 | 0.43 | 0.54 |
2 | 50 | 165 | 55 | 140 | 25.4 | 7 | 57 | 2.88 | 1.32 | 1.56 |
2 1/2 | 65 | 190 | 67 | 162 | 28.575 | 7 | 67 | 3.82 | 1.73 | 2.09 |
3 | 80 | 190 | 83 | 165 | 25.4 | 8 | 67 | 4.68 | 2 | 2.68 |
4 | 100 | 235 | 108 | 203 | 31.75 | 10 | 76 | 8.48 | 3.54 | 4.94 |
5 | 130 | 280 | 135 | 244 | 34.925 | 12 | 86 | 14.18 | 5.81 | 8.37 |
6 | 150 | 320 | 162 | 286 | 31.75 | 13 | 86 | 21.9 | 8.86 | 13.04 |
8 | 200 | 395 | 212 | 356 | 38.1 | 27 | 95 | 45.96 | 18.02 | 27.93 |
10 | 250 | 470 | 265 | 432 | 38.1 | 31 | 105 | 78.21 | 30.04 | 48.16 |
12 | 300 | 535 | 315 | 495 | 38.1 | 36 | 105 | 117.31 | 43.76 | 73.55 |
14 | 350 | 560 | 346 | 518 | 41.275 | 41 | 114 | 140.86 | 50.2 | 90.65 |
16 | 400 | 615 | 397 | 572 | 44.45 | 46 | 124 | 188.73 | 64.42 | 124.31 |
18 | 450 | 685 | 448 | 635 | 50.8 | 50 | 133 | 252.97 | 84.57 | 168.39 |
20 | 500 | 750 | 497 | 696 | 53.975 | 55 | 133 | 331.81 | 109.13 | 222.68 |
24 | 600 | 900 | 597 | 835 | 66.675 | 67 | 152 | 579.52 | 190.27 | 389.25 |
Size in In. | Size in Millimeter | I.D. | Web Thick. | Outer Diameter | Center to Center | Web Width | Thickness | Spectacle Blind Weight in Kilogram | Hole Dia | Paddle Spacer Blank Weight in Kilogram | Paddle Blank Weight in Kilogram |
1/2 | 15 | 16 | 4 | 61 | 80 | 38 | 6.4 | 0.28 | 22.225 | 0.13 | 0.14 |
3/4 | 20 | 21 | 5 | 67 | 90 | 41 | 9.7 | 0.52 | 22.225 | 0.24 | 0.27 |
1 | 25 | 27 | 5 | 76 | 100 | 64 | 9.7 | 0.65 | 25.4 | 0.3 | 0.35 |
1 1/4 | 32 | 35 | 5 | 86 | 110 | 64 | 9.7 | 0.82 | 25.4 | 0.37 | 0.45 |
1 1/2 | 40 | 41 | 7 | 95 | 125 | 70 | 12.7 | 1.3 | 28.575 | 0.58 | 0.71 |
2 | 50 | 53 | 7 | 140 | 165 | 70 | 12.7 | 2.9 | 25.4 | 1.33 | 1.56 |
2 1/2 | 65 | 63 | 8 | 162 | 190 | 76 | 15.7 | 4.78 | 28.575 | 2.19 | 2.58 |
3 | 80 | 78 | 10 | 172 | 205 | 76 | 19.1 | 6.36 | 31.75 | 2.81 | 3.54 |
4 | 100 | 102 | 12 | 206 | 240 | 89 | 22.4 | 10.47 | 34.925 | 4.5 | 5.96 |
5 | 130 | 128 | 15 | 251 | 290 | 89 | 28.4 | 19.55 | 41.275 | 8.31 | 11.23 |
6 | 150 | 154 | 18 | 279 | 320 | 89 | 35.1 | 29.08 | 38.1 | 11.93 | 17.15 |
8 | 200 | 203 | 31 | 349 | 395 | 102 | 41.1 | 52.23 | 44.45 | 20.8 | 31.43 |
10 | 250 | 255 | 39 | 432 | 480 | 114 | 50.8 | 98.33 | 50.8 | 38.79 | 59.53 |
12 | 300 | 303 | 46 | 518 | 570 | 114 | 60.5 | 169.01 | 53.975 | 67.06 | 101.94 |
14 | 350 | 333 | 50 | 575 | 635 | 127 | 66.5 | 229.84 | 60.325 | 91.76 | 138.07 |
16 | 400 | 381 | 58 | 638 | 705 | 133 | 76.2 | 320.1 | 66.675 | 125.32 | 194.78 |
18 | 450 | 429 | 65 | 702 | 775 | 146 | 85.9 | 432.4 | 73.025 | 166.56 | 265.84 |
20 | 500 | 478 | 72 | 752 | 830 | 152 | 95.3 | 540.14 | 79.375 | 201.7 | 338.44 |
24 | 600 | 575 | 84 | 899 | 990 | 178 | 111.3 | 898.71 | 92.075 | 333.8 | 564.9 |
Size in inch. | Size in mm | O.D. | I.D. | Center to Center | Thick. | Web Thick. | Web Width | Hole Dia | Paddle Blank Weight in Kilogram | Spectacle Blind Weight in Kilogram | Paddle Spacer Blank Weight in Kilogram |
1/2 | 15 | 67 | 16 | 90 | 9.7 | 5 | 38 | 22.225 | 0.27 | 0.53 | 0.25 |
3/4 | 20 | 73 | 21 | 95 | 9.7 | 5 | 41 | 22.225 | 0.32 | 0.62 | 0.29 |
1 | 25 | 83 | 27 | 110 | 9.7 | 5 | 64 | 25.4 | 0.41 | 0.79 | 0.37 |
1 1/4 | 32 | 102 | 35 | 130 | 12.7 | 7 | 64 | 28.575 | 0.82 | 1.56 | 0.73 |
1 1/2 | 40 | 114 | 41 | 145 | 15.7 | 8 | 70 | 31.75 | 1.28 | 2.39 | 1.11 |
2 | 50 | 143 | 53 | 170 | 15.7 | 8 | 70 | 28.575 | 2.01 | 3.75 | 1.73 |
2 1/2 | 65 | 165 | 63 | 195 | 19.1 | 10 | 76 | 31.75 | 3.26 | 6.05 | 2.78 |
3 | 80 | 194 | 78 | 230 | 22.4 | 12 | 76 | 34.925 | 5.29 | 9.73 | 4.43 |
4 | 100 | 232 | 102 | 275 | 28.4 | 22 | 89 | 41.275 | 9.59 | 17.34 | 7.74 |
5 | 130 | 276 | 128 | 325 | 35.1 | 27 | 89 | 47.625 | 16.79 | 29.97 | 13.17 |
6 | 150 | 314 | 154 | 370 | 41.1 | 31 | 89 | 53.975 | 25.44 | 44.77 | 19.32 |
8 | 200 | 384 | 198 | 440 | 53.8 | 41 | 102 | 53.975 | 49.82 | 86.39 | 36.57 |
10 | 250 | 473 | 248 | 540 | 66.5 | 50 | 114 | 66.675 | 93.43 | 161.18 | 67.74 |
12 | 300 | 546 | 289 | 620 | 79.2 | 60 | 114 | 73.025 | 148.27 | 255.01 | 106.73 |
Temperature (F°) | Class 300 | Class 150 | Class 400 | Class 600 | Class 1500 | Class 900 | Class 2500 |
-20 to 100 | 740 | 285 | 985 | 1480 | 3705 | 2220 | 6170 |
200 | 680 | 260 | 905 | 1360 | 3395 | 2035 | 5655 |
300 | 655 | 230 | 870 | 1310 | 3270 | 1965 | 5450 |
400 | 635 | 200 | 845 | 1265 | 3170 | 1900 | 5280 |
500 | 605 | 170 | 805 | 1205 | 3015 | 1810 | 5025 |
600 | 570 | 140 | 755 | 1135 | 2840 | 1705 | 4730 |
650 | 550 | 125 | 730 | 1100 | 2745 | 1650 | 4575 |
700 | 530 | 110 | 710 | 1060 | 2655 | 1590 | 4425 |
750 | 505 | 95 | 675 | 1015 | 2535 | 1520 | 4230 |
800 | 410 | 80 | 550 | 825 | 2055 | 1235 | 3430 |
850 | 320 | 65 | 425 | 640 | 1595 | 955 | 2655 |
900 | 230 | 50 | 305 | 460 | 1150 | 690 | 1915 |
950 | 135 | 35 | 185 | 275 | 685 | 410 | 1145 |
1000 | 85 | 20 | 115 | 170 | 430 | 255 | 715 |