ASME B16.48 Class 900 Spectacle Blind Flanges are specialized piping components designed for high-pressure systems that require reliable isolation and flow control. Also known as Figure 8 Blanks #900, these flanges consist of a solid plate and a ring connected by a small metal bridge, allowing operators to easily switch between open and closed positions. At Tesco Steel & Engineering, we manufacture these high-quality spectacle blind flanges to meet stringent international standards, ensuring exceptional durability, leak-proof performance, and long service life in demanding industrial applications.
Our Class 900 spectacle blind flanges are widely used in industries such as oil & gas, petrochemicals, chemical processing, power generation, and marine engineering. We proudly export these flanges to countries including the USA, UK, Germany, Italy, Saudi Arabia, UAE, and Oman, serving both Western and Middle Eastern markets with products that maintain superior quality and reliability. Their primary applications include shutting off high-pressure pipelines during maintenance, inspection, or emergency operations, ensuring safety and operational efficiency in critical systems.
Manufactured at our state-of-the-art Mumbai factory, equipped with advanced CNC machinery, automated production lines, and stringent quality control systems, Tesco Steel & Engineering ensures each flange meets precise dimensional and performance standards. Known for superior quality and high-tech manufacturing, our Class 900 spectacle blind flanges provide excellent corrosion resistance, mechanical strength, and reliable operation. Trusted by engineers and project managers worldwide, our Figure 8 Blanks #900 are ideal for critical applications requiring safety, reliability, and long-term performance across multiple industries..
| 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 |