Class 1500/2500 SS Flange
Heavy-Duty Flanges for Extreme Pressure Applications
SSM manufactures ASME B16.5 compliant Class 1500 and 2500 stainless steel flanges designed for critical high-pressure systems in oil & gas, petrochemical, and power generation industries. Our flanges meet the most demanding pressure requirements while maintaining superior corrosion resistance.
Technical Specifications
1. Class Comparison
| Parameter | Class 1500 | Class 2500 |
|---|---|---|
| Pressure Rating | 3600 psi @ 100°F | 6000 psi @ 100°F |
| Size Range | ½" - 24" | ½" - 12" |
| Minimum Yield Strength | 30 ksi (207 MPa) | 30 ksi (207 MPa) |
| Hub Thickness | 50-80% thicker than Class 900 | 80-120% thicker than Class 900 |
| Common Materials | 316L, 317L, 321 | 316L, 317L, 321, 347 |
2. Enhanced Design Features
| Feature | Class 1500/2500 Benefits |
|---|---|
| Massive Bolt Circles | Withstands extreme forces |
| Precision RTJ Grooves | Metal-to-metal sealing |
| Reinforced Hub Design | Superior stress distribution |
| Extra Thick Body | Maximum pressure containment |
3. Pressure-Temperature Ratings
| Temp (°F) | 1500 (psi) | 2500 (psi) |
|---|---|---|
| 100 | 3600 | 6000 |
| 200 | 3275 | 5450 |
| 300 | 3000 | 5000 |
| 400 | 2750 | 4600 |
| 500 | 2750 | 4600 |
Manufacturing Process
Heavy-Wall Production
Special Alloy Selection - High-grade stainless steels
Precision Forging - 15,000-ton hydraulic presses
Controlled Heat Treatment - Solution annealing
Ultra-Precision Machining - ±0.02mm tolerance
Comprehensive NDE Testing - UT, RT, PT
Quality Assurance
100% Radiographic Testing (Class 2500)
Full Ultrasonic Examination
Liquid Penetrant Inspection
Positive Material Identification
Hardness Testing Across Sections
Hydrostatic Testing (Optional)
Available Configurations
Flange Types
Weld Neck - Full penetration weld prep
RTJ Blind - High-pressure closures
Integral Reinforced - For cyclic service
Special Heavy Hub - For extreme conditions
Material Options
316L - Standard corrosion resistance
317L - Enhanced acid resistance
321/347 - High-temperature stability
Duplex 2205 - For chloride environments
Super Duplex 2507 - Maximum corrosion resistance
Industry Applications
Critical Service Uses
• Oil & gas wellhead equipment
• Refinery high-pressure piping
• Petrochemical reactor systems
• Power plant steam headers
• Hydraulic fracturing systems
Why Choose SSM High-Pressure Flanges?
✔ Full ASME B16.5 Compliance
✔ NACE MR0175 Certification Available
✔ Radiographic Testing Standard on Class 2500
✔ Competitive Lead Times for heavy-class flanges
✔ Engineering Support for critical applications
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