ASTM A182 F91 Spectacle Blind Flange ASME B16.48
We are a leading manufacturer and exporter of ASTM A182 F91 Spectacle Blind Flange ASME B16.48 based in China. With a commitment to quality and precision, we deliver high-performance flanges designed for critical applications in industries such as oil & gas, power generation, petrochemical, and chemical processing.
What is ASTM A182 F91?
ASTM A182 F91 is a forged high-alloy chrome-moly steel grade engineered for demanding environments requiring superior mechanical properties and high-temperature resistance.
- High Creep Strength: Maintains structural integrity under extreme stress.
- Thermal Stability: Operates reliably in high-temperature environments exceeding 600°C.
Chemical Composition of ASTM A182 F91:
| Element | Composition (% by weight) |
|---|---|
| Carbon (C) | 0.08 – 0.12 |
| Manganese (Mn) | 0.30 – 0.60 |
| Phosphorus (P) | ≤ 0.020 |
| Sulfur (S) | ≤ 0.010 |
| Silicon (Si) | 0.20 – 0.50 |
| Chromium (Cr) | 8.00 – 9.50 |
| Molybdenum (Mo) | 0.85 – 1.05 |
| Vanadium (V) | 0.18 – 0.25 |
| Nickel (Ni) | ≤ 0.40 |
Mechanical Properties of ASTM A182 F91:
| Property | Value |
|---|---|
| Tensile Strength | ≥ 585 MPa |
| Yield Strength (0.2% offset) | ≥ 415 MPa |
| Elongation in 2″ (50 mm) | ≥ 20% |
| Hardness (HBW) | ≤ 250 HBW |
What is a Spectacle Blind Flange?
A Spectacle Blind Flange is a critical pipeline component used to isolate or regulate the flow of fluids. Its design includes two discs connected :
- Blind Disc (blank ): Used to completely block flow.
- Spacer Disc (spader ring): Allows flow to pass through.
This design enables easy switching between open and closed flow states, ensuring safe operation during maintenance or inspection.
ASTM A182 F91 Spectacle Blind Flange Specifications:
| Specification | Details |
|---|---|
| Standard | ASME B16.48, API 590, etc. |
| Size Range | ½” to 24” (custom sizes available) |
| Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Face Type | Raised Face (RF), Flat Face (FF), or Ring-Type Joint (RTJ) |
Applications of ASTM A182 F91 Spectacle Blind Flanges:
- Oil & Gas: Isolates sections of pipelines in refineries and offshore platforms.
- Power Generation: Reliable for boiler systems, steam piping, and turbines.
- Petrochemical: Ensures safe flow control in corrosive and high-temperature environments.
- Chemical Processing: Provides durability and safety under extreme operating conditions.
Why Choose Us for ASTM A182 F91 Spectacle Blind Flanges?
We specialize in delivering premium-quality ASTM A182 F91 Spectacle Blind Flanges that meet stringent industry standards, including ASME B16.48. Our flanges undergo rigorous quality inspections to ensure:
- Precision Engineering for reliable performance.
- Custom Sizes & Configurations to meet your project needs.
- Competitive Pricing without compromising quality.
Where to Buy ASTM A182 F91 Spectacle Blind Flanges?
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- A wide range of ASTM A182 F91 Spectacle Blind Flanges.
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