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Spectacle Blind Flanges
 
 
Dimension of class 150 Raised Face 
NPS (Inch) Inside diameter,B,(mm) Outside diameter, o( mm) Centerline Dimension,A,(mm) Thickness,t ,(mm) Web width,W,(mm)
1/2 16 45 60 3 38
3/4 21 54 70 3 38
1 27 64 80 3 38
1 1/4 42 73 90 6.4 38
1 1/2 48 83 100 6.4 38
2 61 102 120 6.4 51
2 1/2 73 107 140 6.4 51
3    89 133 150 6.4 64
3 1/2 102 159 175 9.7 64
4    114 172 190 9.7 64
5    141 194 215 9.7 76
6    168 219 240 12.7 76
8    219 276 300 12.7 76
10    273 337 360 15.7 102
12    324 406 430 19.1 102
14    356 448 475 19.1 108
16    406 511 460 22.4 108
18    457 546 580 25.4 114
20    508 603 635 28.4 121
24    610 714 750 31.8 140
Notes:
Hole size (where required due to bolt spacing) shall be the same as the flange bolt hole and located such that
it will not interface with bolting between two flanges.
All dimensions are in mm
 
 
Dimension of class 150 Raised Face of class 300 raised face
NPS (Inch) Inside diameter,B,(mm) Outside diameter, o( mm) Centerline Dimension,A,(mm) Thickness,t ,(mm) Web width,W,(mm)
1/2 16 51 65 6.4 38
3/4 21 64 80 6.4 38
1 27 70 90 6.4 38
1 1/4 42 79 100 6.4 38
1 1/2 48 92 115 6.4 38
2 61 108 125 9.7 51
2 1/2 73 127 150 9.7 51
3    89 146 170 9.7 64
3 1/2 102 162 185 12.7 64
4    114 178 200 12.7 64
5    141 213 235 15.7 76
6    168 248 270 15.7 76
8    219 305 330 22.4 76
10    273 359 385 25.4 102
12    324 419 450 28.4 102
14    356 483 515 31.8 108
16    406 536 570 38.1 108
18    457 594 630 41.1 114
20    508 651 685 44.5 121
24    610 772 810 50.8 140
Notes:
Hole size (where required due to bolt spacing) shall be the same as the flange bolt hole and located such that
it will not interface with bolting between two flanges.
All dimensions are in mm
 
 
Dimension Of 600 Raised Face
NPS (Inch) Inside diameter,B,(mm) Outside diameter, o( mm) Centerline Dimension,A,(mm) Thickness,t ,(mm) Web width,W,(mm)
1/2 16 51 65 6.4 38
3/4 21 64 80 6.4 38
1 27 70 90 6.4 57
1 1/4 37 79 100 9.7 57
1 1/2 43 92 115 9.7 67
2 55 108 125 9.7 57
2 1/2 67 127 150 12.7 67
3    83 146 170 12.7 67
3 1/2 96 159 185 15.7 76
4    108 191 215 15.7 76
5    135 238 265 19.1 86
6    162 264 290 22.4 86
8    212 318 350 28.4 95
10    265 397 430 35.1 105
12    315 454 490 41.1 105
14    346 489 525 44.5 114
16    397 562 605 50.8 124
18    448 610 655 53.8 133
20    497 679 725 63.5 133
24    597 787 840 73.2 152
Notes:
Hole size (where required due to bolt spacing) shall be the same as the flange bolt hole and located such that
it will not interface with bolting between two flanges.
All dimensions are in mm
 
 
Dimension of 900 raised face
NPS (Inch) Inside diameter,B,(mm) Outside diameter, o( mm) Centerline Dimension,A,(mm) Thickness,t ,(mm) Web width,W,(mm)
1/2 16 60 80 6.4 38
3/4 21 67 90 6.4 41
1 27 76 100 6.4 57
1 1/4 37 86 110 9.7 57
1 1/2 43 95 125 9.7 67
2 55 140 165 12.7 57
2 1/2 67 162 190 12.7 67
3    83 165 190 15.7 67
4    108 203 235 19.1 76
5    135 244 280 22.4 86
6    162 286 320 25.4 86
8    212 356 395 35.1 95
10    265 432 470 41.1 105
12    315 495 535 47.8 105
14    346 518 560 53.8 114
16    397 572 615 60.5 124
18    448 635 685 66.5 133
20    497 696 750 73.2 133
24    597 835 900 88.9 152
Notes:
Hole size (where required due to bolt spacing) shall be the same as the flange bolt hole and located such that
it will not interface with bolting between two flanges.
All dimensions are in mm
 
* There will may be typical error
 
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