ASTM A182 F51 Duplex Steel Spectacle Blind Flange / B16.48 RTJ Figure-8 Blanks
ASME B16.48 ASTM A182 F51 Duplex Steel Spectacle Blind Flange Figure-8 Blanks
Figure-8 flanges, also known as sight or spectacle flanges, are specialized components used in piping systems to facilitate maintenance, isolation, and inspection of pipelines. The figure-8 design features two circular ends connected by a narrow waist, which offers flexibility in alignment and connection. The material can be made from various materials including carbon steel, stainless steel, and duplex stainless steel, depending on the application requirements. Their unique design allows for efficient operation and flexibility in various industrial applications.
Advantages:
- Flexibility: The figure-8 design allows for slight misalignments, making installation easier and reducing stress on the pipe system.
- Strength: Offers a good balance of strength and weight, making them suitable for high-pressure applications.
- Corrosion Resistance: Depending on the material, they can offer excellent resistance to various corrosive environments.
ASTM A182 F51 Duplex Steel Flange Chemical Composition
| C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
ASTM A182 F51 Duplex Steel Flange Mechanical Table
| Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
|---|---|---|---|
| 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
Other Types of Duplex Steel Flange
| Duplex 2205 Flanges | EN TYPE | DIN |
|
WN – Welding Neck |
EN-TYPE 11 |
DIN 2631 |
| DIN 2632 | ||
| DIN 2633 | ||
| DIN 2634 | ||
| DIN 2635 | ||
| BL – Blind | EN-TYPE 05 | DIN 2527 |
| SO – Slip On | EN-TYPE 01/12 | |
|
LJ – Lap Joint |
EN-TYPE 02/04 |
DIN 2641 |
| DIN 2642 | ||
| DIN 2655 | ||
| DIN 2656 | ||
| LWN – Long Welding Neck / Integral | EN-TYPE 21 | |
| Welding Collars | EN-TYPE 32/34 | |
| Super Duplex 2507 Flat Flange for Welding | DIN 2573 | |
| DIN 2576 | ||
| SW – Socket Weld | EN-TYPE 14 | |
| THR – Threaded | EN-TYPE 13 | DIN 2566 |
| Super Duplex 2507 Lap Joint Short Stub End | DIN 2673 |
Product Usage & Application
- Petrochemical Industry
- Chemical Industry
- Nuclear Power Plant Industry
- Oil and Gas Industry
- Research & Development
- Mega Projects & Defense & Development Industries
- Pulp & Paper Industry
- Marine Applications
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