SPECTACLE BLINDS
Spectacle Blind Flanges Manufacture
What is Spectacle blind flanges?
S Nomi is a renowned Spectacle Blind Flanges Manufacturer and Supplier, located in Kolkata, West Bengal, Bihar, Odisha, and Jharkhand. Spectacle Blind Flanges Manufacturer – also known as figure-8 blind flanges – are generally pieces of metal. Spectacle Blind Flanges cut to fit between two pipe flanges and usually sandwiched between two gaskets. A Spectacle Blind Flanges is often made from two metal discs that are attached to each other by a small section of steel.
What is the purpose of a spectacle blind?
A Spectacle Blind Flanges or spec blind, abbreviated as SB, is a safety device used to isolate a section of line or piece of equipment when the line or equipment needs to be inspected or removed from service. It is different than a valve in that the blind is a permanent or long-term isolation device.
How do you use a spectacle blind flange?
Spectacle Blinds be applied in systems, which regularly need to be separated from other installations. Normally, a Spectacle Blind is mounted in the “open” position so that flow through the pipe is possible. If the Spectacle Blind in the “close” position is rotated, the pipe is blanked off and no flow is possible.
Spectacle Blinds products are commonly applied to separating pipe systems permanently and to connect. Our offered Blind product is a steel plate cut into two discs of a specific thickness. These two discs are connected or attached by a steel section, which looks like the nose piece of glasses. Here, one of the discs is a solid plate, whereas the other is a ring (its inside diameter is equal to that of a flange). We are provide high quality as Spectacle Blind Flanges Manufacture in Kolkata, West Bengal, Bihar, Odisha, and Jharkhand. These Blinds can be efficiently used in systems that regularly require to be separated from other installations. These high-grade Spectacle Blind Flanges are mounted in the position, which is in an open state, in such a way that flow through the pipe is possible. If we rotate the close position of Spectacle Blinds, the pipe is blanked off, and no current is possible.
These are turned to a closed position while the maintenance of a pipe system is carried out. Now, the flow will take place through a hole drilled in the connection piece. So, by loosening all bolts and partial removal of these Spectacle Blind can be switched. After restoring the blinds from old gaskets, the bolts are then re-assembled and tightened.
Our product range also comprises of Carbon Steel Flanges, Spectacle Flange and Duplex Flanges. These are durable in quality and are precision made. These spectacle flanges are made from high quality carbon steel and stainless steel and are offered in different dimensions & sizes that ensure that no compromise is made the aspect of quality.
Spectacle Flanges Range
½” (15 NB) to 48″ (1200NB) in 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 6,10,16,25, 40,64,100,160 ETC. Available with NACE MR 01-75
Stainless Steel Spectacle Flanges
Grade : 304, 304L, 304H, 309, 310, 310S, 316, 316Ti, 316 L, 317, 317L, 321, 347, 347 H, 409, 410, 410S, 420, 430L
Duplex Steel Spectacle Flanges
Grade : 2205 (UNS No. S31803), 2507 (UNS No. S32750)
Nickel Alloy Spectacle Flanges
Grade : 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), Titanium (Grade I & II)
Copper Alloy Spectacle Flanges
Grade : UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu -Ni- 70/30)
Quick Links
- U Bolt Flange
- MS Welding Rods
- Jubilee Clamp
- Hose Clip
- Flow Switch
- Pressure Switch RT116
- Rubber Diaphragm Valves
- Anchor Fastener Bullet
- Universal Clamp
- U Clamp Flange
- Hose Box Key
- Heavy Flange
- Blind Plate Flange
- JIS Standard Flanges
- EN 1092-1:2001 /TYPE O2/A
- EN 1092 Plate Flanges
- IS 6392 Type Flanges
- BS10 Plate Flanges
- AWWA Flanges
- API 6A Flanges
- Hydrant Coupling Brass
- Hydrant Coupling SS
- Branch Pipe SS
- Fire Brigade 4 Way Flange
- Fire Brigade 3 Way Flange
- PU Connector
- Rosett Plate
- Mild Steel Angles / MS Angle Manufacturer
- MS Plate
- Pipe Clamp Manufacturer
- Orifice Welding Neck Flanges
- Branch Pipe Brass
- Sprinkler Wall Flange
- Sprinkler Upright
- Sprinkler Pendent
- Sprinkler Pipe Flexible
- Flexible Hose
- Flexi Drop
- RRL Hose
- Hose Box Knob
- Reducing Flanges
- Alloy Steel Flange Manufacturer
- Expander Flange Manufacturer
- Blind Flange
- Plate Flanges
- Ring Spacers
- Ring Type Joint Flange
- Screwed Flanges
- Long Weld Neck Flanges
- Weld Neck Flanges Series Manufacturers
- Carbon Steel / CS Flanges Manufacturer
- Threaded Flanges
- Lap Joint Flanges
- Flat Flange
- Weld Neck Flanges
- Socket Weld Flanges
- Slip-on Flanges
- Orifice Flanges
- High Hub Blinds
- SPECTACLE BLINDS FLANGES
- Nut Bolt Flange
- EN 1092-1:2001 /TYPE 13/A
- EN 1092-1:2001 /TYPE 11/B1
- EN 1092-1:2001 / TYPE O5/A
- ASME B 16.47 Series B WNRF Flanges
- ASME B 16.47 Series A WNRF Flanges
- SPADES & RING FLANGES
- Stainless Steel Flanges
- Sprinkler Flange
- Pressure Flange
- forged flanges Manufacturer
- MS Flanges Manufacturer
- High, Medium Flange
- Hydrant Coupling Flange
- Hose Box Flange
- GM Flange
- GI Flange
- Fire Brigade 3, 4 Way Flange
- Diary Fittings Flange
Dimensions
Spectacle Flanges Standard
- ANSI : ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
- DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
- B.S : BS4504 , BS4504, BS1560, BS10
- OTHER : PLATE, PLATE BLANK
Spectacle Blinds Flanges ANSI B16.5 Class 150 Flanges
ANSI flanges are available at Steel Tubes India Flange in class 150. The ANSI flanges in the class 150 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges. ANSI flanges for class 150 are provided by Steel Tubes India Flange as forgings unless otherwise specified.
CLASS 150 SPECTACLE BLINDS
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
1/2 | 45 | 16 | 60 | 3 | 38 |
3/4 | 54 | 21 | 70 | 3 | 38 |
1 | 64 | 27 | 80 | 3 | 38 |
1¼ | 73 | 42 | 90 | 6.4 | 38 |
1½ | 83 | 48 | 100 | 6.4 | 38 |
2 | 102 | 61 | 120 | 6.4 | 51 |
2½ | 107 | 73 | 140 | 6.4 | 51 |
3 | 133 | 89 | 150 | 6.4 | 64 |
3½ | 159 | 102 | 175 | 9.7 | 64 |
4 | 172 | 114 | 190 | 9.7 | 64 |
5 | 194 | 141 | 215 | 9.7 | 76 |
6 | 219 | 168 | 240 | 12.7 | 76 |
8 | 276 | 219 | 300 | 12.7 | 76 |
10 | 337 | 273 | 360 | 15.7 | 102 |
12 | 406 | 324 | 430 | 19.1 | 102 |
14 | 448 | 356 | 475 | 19.1 | 108 |
16 | 511 | 406 | 460 | 22.4 | 108 |
18 | 546 | 457 | 580 | 25.4 | 114 |
20 | 603 | 508 | 635 | 28.4 | 121 |
24 | 714 | 610 | 750 | 31.8 | 140 |
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
Spectacle Blinds Flanges ANSI B16.5Class 300 Flanges
ANSI flanges are available at Steel Tubes India Flange in class 300. The ANSI flanges in the class 300 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges. ANSI flanges for class 300 are provided by Steel Tubes India Flange as forgings unless otherwise specified.
ClASS 300 SPECTACLE BLINDS
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
1/2 | 51 | 16 | 65 | 6.4 | 38 |
3/4 | 64 | 21 | 80 | 6.4 | 38 |
1 | 70 | 27 | 90 | 6.4 | 38 |
1¼ | 79 | 42 | 100 | 6.4 | 38 |
1½ | 92 | 48 | 115 | 6.4 | 38 |
2 | 108 | 61 | 125 | 9.7 | 51 |
2½ | 127 | 73 | 150 | 9.7 | 51 |
3 | 146 | 89 | 170 | 9.7 | 64 |
3½ | 162 | 102 | 185 | 12.7 | 64 |
4 | 178 | 114 | 200 | 12.7 | 64 |
5 | 213 | 141 | 235 | 15.7 | 76 |
6 | 248 | 168 | 270 | 15.7 | 76 |
8 | 305 | 219 | 330 | 22.4 | 76 |
10 | 359 | 273 | 385 | 25.4 | 102 |
12 | 419 | 324 | 450 | 28.4 | 102 |
14 | 483 | 356 | 515 | 31.8 | 108 |
16 | 536 | 406 | 570 | 38.1 | 108 |
18 | 594 | 457 | 630 | 41.1 | 114 |
20 | 651 | 508 | 685 | 44.5 | 121 |
24 | 772 | 610 | 810 | 50.8 | 140 |
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
Spectacle Blinds Flanges ANSI B16.5 Class 400 Flanges
ANSI flanges are available at Steel Tubes India Flange in class 400. The ANSI flanges in the class 400 specification cover slip-ons, weld necks, lap joints, blinds, and threaded flanges. ANSI flanges for class 400 are provided by Steel Tubes India Flange as forgings unless otherwise specified.
Spectacle Blinds Flanges ANSI B16.5 Class 600 Flanges
ANSI flanges are available at Steel Tubes India Flange in class 600. The ANSI flanges in the class 600 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges. ANSI flanges for class 600 are provided by Steel Tubes India Flange as forgings unless otherwise specified.
CLASS 600 SPECTACLE BLINDS
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
1/2 | 51 | 16 | 65 | 6.4 | 38 |
3/4 | 64 | 21 | 80 | 6.4 | 38 |
1 | 70 | 27 | 90 | 6.4 | 57 |
1¼ | 79 | 37 | 100 | 9.7 | 57 |
1½ | 92 | 43 | 115 | 9.7 | 67 |
2 | 108 | 55 | 125 | 9.7 | 57 |
2½ | 127 | 67 | 150 | 12.7 | 67 |
3 | 146 | 83 | 170 | 12.7 | 67 |
3½ | 159 | 96 | 185 | 15.7 | 76 |
4 | 191 | 108 | 215 | 15.7 | 76 |
5 | 238 | 135 | 265 | 19.1 | 86 |
6 | 264 | 162 | 290 | 22.4 | 86 |
8 | 318 | 212 | 350 | 28.4 | 95 |
10 | 397 | 265 | 430 | 35.1 | 105 |
12 | 454 | 315 | 490 | 41.1 | 105 |
14 | 489 | 346 | 525 | 44.5 | 114 |
16 | 562 | 397 | 605 | 50.8 | 124 |
18 | 610 | 448 | 655 | 53.8 | 133 |
20 | 679 | 497 | 725 | 63.5 | 133 |
24 | 787 | 597 | 840 | 73.2 | 152 |
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
Spectacle Blinds Flanges ANSI B16.5 Class 900 Flanges
ANSI flanges are available at Steel Tubes India Flange in class 900. The ANSI flanges in the class 900 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges. ANSI flanges for class 900 are provided by Steel Tubes India Flange as forgings unless otherwise specified.
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
1/2 | 60 | 16 | 80 | 6.4 | 38 |
3/4 | 67 | 21 | 90 | 6.4 | 41 |
1 | 76 | 27 | 100 | 6.4 | 57 |
1¼ | 86 | 37 | 110 | 9.7 | 57 |
1½ | 95 | 43 | 125 | 9.7 | 67 |
2 | 140 | 55 | 165 | 12.7 | 57 |
2½ | 162 | 67 | 190 | 12.7 | 67 |
3 | 165 | 83 | 190 | 15.7 | 67 |
4 | 203 | 108 | 235 | 19.1 | 76 |
5 | 244 | 135 | 280 | 22.4 | 86 |
6 | 286 | 162 | 320 | 25.4 | 86 |
8 | 356 | 212 | 395 | 35.1 | 95 |
10 | 432 | 265 | 470 | 41.1 | 105 |
12 | 495 | 315 | 535 | 47.8 | 105 |
14 | 518 | 346 | 560 | 53.8 | 114 |
16 | 572 | 397 | 615 | 60.5 | 124 |
18 | 635 | 448 | 685 | 66.5 | 133 |
20 | 696 | 497 | 750 | 73.2 | 133 |
24 | 835 | 597 | 900 | 88.9 | 152 |
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
Spectacle Blinds Flanges ANSI B16.5 Class 1500 Flanges
ANSI flanges are available at Steel Tubes India Flange in class 1500. The ANSI flanges in the class 1500 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges. ANSI flanges for class 1500 are provided by Steel Tubes India Flange as forgings unless otherwise specified.
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
1/2 | 61 | 16 | 80 | 6.4 | 38 |
3/4 | 67 | 21 | 90 | 9.7 | 41 |
1 | 76 | 27 | 100 | 9.7 | 64 |
1¼ | 86 | 35 | 110 | 9.7 | 64 |
1½ | 95 | 41 | 125 | 12.7 | 70 |
2 | 140 | 53 | 165 | 12.7 | 70 |
2½ | 162 | 63 | 190 | 15.7 | 76 |
3 | 172 | 78 | 205 | 19.1 | 76 |
4 | 206 | 102 | 240 | 22.4 | 89 |
5 | 251 | 128 | 290 | 28.4 | 89 |
6 | 279 | 154 | 320 | 35.1 | 89 |
8 | 349 | 203 | 395 | 41.1 | 102 |
10 | 432 | 255 | 480 | 50.8 | 114 |
12 | 518 | 303 | 570 | 60.5 | 114 |
14 | 575 | 333 | 635 | 66.5 | 127 |
16 | 638 | 381 | 705 | 76.2 | 133 |
18 | 702 | 429 | 775 | 85.9 | 146 |
20 | 752 | 478 | 830 | 95.3 | 152 |
24 | 899 | 575 | 990 | 111.3 | 178 |
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
Spectacle Blinds Flanges ANSI B16.5 Class 2500 Flanges
ANSI flanges are available at Steel Tubes India Flange in class 2500. The ANSI flanges in the class 2500 specification cover slip-ons, weld necks, lap joints, blinds, and threaded flanges. ANSI flanges for class 2500 are provided by Steel Tubes India Flange as forgings unless otherwise specified.
NPS | Outside Ø A | Inside Ø B | Centerline C | Thickness t | Web Width W |
1/2 | 67 | 16 | 90 | 9.7 | 38 |
3/4 | 73 | 21 | 95 | 9.7 | 41 |
1 | 83 | 27 | 110 | 9.7 | 64 |
1¼ | 102 | 35 | 130 | 12.7 | 64 |
1½ | 114 | 41 | 145 | 15.7 | 70 |
2 | 143 | 53 | 170 | 15.7 | 70 |
2½ | 165 | 63 | 195 | 19.1 | 76 |
3 | 194 | 78 | 230 | 22.4 | 76 |
4 | 232 | 102 | 275 | 28.4 | 89 |
5 | 276 | 128 | 325 | 35.1 | 89 |
6 | 314 | 154 | 370 | 41.1 | 89 |
8 | 384 | 198 | 440 | 53.8 | 102 |
10 | 473 | 248 | 540 | 66.5 | 114 |
12 | 546 | 289 | 620 | 79.2 | 114 |
General notes:
- Dimensions are in millimeters unless otherwise indicated.
- D = Hole size (where required) should be the same as the flange bolt hole. In practice, these dimensions have been rounded round off upwards.
- Wt = Thickness of the web (or tie bar) should be 6 mm minimum, or equal to Thickness (t) if less than 6 mm.
- Spectacle Blinds Flanges should be made from a plate or forging specification, approved for use by ASME B31.3, of essentially the same chemical composition as the mating flanges and piping involved.
- Spectacle Blinds Flanges according to ASME B16.48 may be used for installation between ASME B16.5 flanges
- Depending on a customer specification, some dimensions can be different from what on this page is defined.