24 Inch Alloy Steel Blind Flange ANSI B16.5/B16.47 Class 150-2500 Wear Resistant Flat Face Design
ASTM A182 F1 F5 F9 F11 F12 F22 F91 ANSI B16.5/B16.47 BL alloy steel blind flanges are engineered for demanding industrial applications requiring exceptional strength, corrosion resistance, and high-temperature performance.
Alloy steel is enhanced with elements including molybdenum, manganese, nickel, chromium, vanadium, silicon, and boron to achieve superior mechanical properties:
- High strength and toughness for heavy-duty applications
- Excellent wear and corrosion resistance for extended service life
- Low temperature and high temperature performance capabilities
- Non-magnetic properties where required
| Parameter | Specifications |
|---|---|
| Size Range | 1/2" to 24" |
| Pressure Class | 150, 300, 400, 600, 900, 1500, 2500 |
| Thickness | Sch10S to Sch160 |
| Standards | ASME/ANSI B16.5/B16.47, JIS B2220 |
| Type | Blind (BL) |
| Applications | Offshore, Oil Field, Shipbuilding, Water Systems, Natural Gas, Pipe Projects, Electric Power |
| Quality Testing | Direct-reading Spectrograph, Hydrostatic testing, X-ray detection, Ultrasonic flaw detection, Magnetic particle detection |
| Certifications | Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report |
| Grade | Steel Names | C | Mn | Si | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|---|
| ASTM A182 F1 | C-0.5Mo | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| ASTM A182 F5 | 5Cr-0.5Mo | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| ASTM A182 F9 | 9Cr-1Mo | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
| ASTM A182 F11 | 1.25Cr-0.5Mo-Si(CL1/CL3) 1.25Cr-0.25Mo-Si (CL2) |
0.5-0.15 | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 1.0-1.5 | 0.44-0.65 |
| ASTM A182 F12 | 1Cr-0.5Mo | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| ASTM A182 F22 | 2.25Cr-1Mo | 0.5-0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| ASTM A182 F91 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
Manufactured in compliance with ASME B16.5 standards, these blind flanges are available in pressure classes ranging from 150 to 2500. The solid disc design without a hub or bored center provides reliable end-of-line sealing for piping systems, valves, and pressure vessel openings.
- Symmetrically drilled bolt holes for secure installation
- Available with raised face (RF), ring joint face (RJ), or flat face (FF) configurations
- Functions as a permanent or temporary end cap for piping systems
- Manufactured from high-quality castings, forgings, plates, or flat bars
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.