Overview
Alloy Steel Flanges are designed for superior strength, toughness, and resistance to wear, corrosion, and extreme temperatures. They are widely used in oil & gas, refineries, petrochemicals, power generation, and high-pressure applications.
Types of Alloy Steel Flanges
Technical Specifications
| Standard | Size Range | Pressure Rating | Face Type |
|---|---|---|---|
| ASME / ANSI B16.5 & B16.47 | ⅛” to 48” | 150# to 2500# | RF, RTJ |
| DIN | DN10 to DN2000 | PN6 to PN400 | RF, FF |
| API 6A | Custom sizes | 10,000 / 15,000 / 25,000 PSI | RF, RTJ |
Material Grades: ASTM A182 F1 / F5 / F9 / F11 / F22 / F91 / F92 etc.
ASTM A519 Gr. 4130 / Gr. 4140, API 6A Type – 10,000 / 15,000 / 25,000 PSI
Chemical & Mechanical Properties
- Tensile Strength: 585 MPa min (depending on grade)
- Yield Strength: 240–415 MPa
- Hardness: 143–217 HB
- Chromium Content: 1–12% (depending on alloy)
- Excellent creep resistance at high temperature
Applications & Industries
Key Features & Benefits
- Superior strength & durability
- Excellent resistance to wear & heat
- Leak-proof performance in extreme conditions
- Available for ultra-high pressure ratings (API 6A)
- Customizable in various sizes & finishes
Certifications & Quality Assurance
- ISO Certified
- PED & IBR Approved
- Third-party inspection (TPI) available
- Mill Test Certificates (MTC) provided
Frequently Asked Questions
Where are Alloy Steel Flanges commonly used?
They are primarily used in high-pressure and high-temperature applications such as oil & gas pipelines, power plants, and refineries.
What’s the difference between A182 F22 and F91 flanges?
F22 offers good strength and corrosion resistance, while F91 provides higher creep strength and is preferred for elevated temperatures.
Can Alloy Steel Flanges handle very high pressures?
Yes, API 6A Alloy Steel Flanges are designed for ultra-high pressures up to 25,000 PSI.
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