ASME B16.47 Series A And Series B Stainless Steel Flanges
Heavy-Duty Large Diameter Flanges for Industrial Piping Systems
SSM manufactures full range of ASME B16.47 Series A and Series B stainless steel flanges for critical large-diameter piping applications. Our flanges meet the most demanding requirements for oil & gas, petrochemical, and power generation industries.
ASME B16.47 Flange Specifications
1. Series Comparison
| Feature | Series A (MSS SP-44) | Series B (API 605) |
|---|---|---|
| Size Range | 26" - 60" (DN650-DN1500) | 26" - 60" (DN650-DN1500) |
| Pressure Class | 150# - 900# | 75# - 900# |
| Bolt Holes | Even number | Even or odd number |
| Hub Design | Longer taper | Shorter taper |
| Common Applications | Petrochemical, Water | Oil & Gas, Offshore |
2. Material Grades & Standards
| Grade | ASTM Standard | Series A/B Availability | Temperature Range |
|---|---|---|---|
| 304/304L | A182 F304/F304L | Both Series | -196°C to 800°C |
| 316/316L | A182 F316/F316L | Both Series | -196°C to 800°C |
| 317L | A182 F317L | Series A Only | -196°C to 800°C |
| 321 | A182 F321 | Series B Only | -196°C to 800°C |
3. Pressure-Temperature Ratings
| Class | 150# | 300# | 400# | 600# | 900# |
|---|---|---|---|---|---|
| Series A (PSI) | 275 | 720 | 960 | 1440 | 2160 |
| Series B (PSI) | 230 | 600 | 800 | 1200 | 1800 |
Manufacturing Excellence
Production Process
Plate Cutting - CNC plasma/waterjet for large diameters
Forming - Hot forging for superior grain structure
Heat Treatment - Solution annealing for corrosion resistance
Machining - Vertical boring mills for precision
Testing - Full NDE including RT/UT
Quality Assurance
Dimensional Verification - Per ASME B16.47 tables
Material Certification - ASTM A182 compliance
NDE Testing - RT/UT per ASME Section V
Hardness Testing - Per ASTM A961
Face Flatness - 0.05mm maximum deviation
Technical Advantages
✔ Heavy-Duty Construction - For high-stress applications
✔ Precision Alignment - CNC-machined bolt circles
✔ Full Traceability - Heat number tracking
✔ Interchangeability - Matches existing piping
Industry Applications
Oil & Gas
Pipeline compressor stations
Tank farm connections
Offshore platform piping
Power Generation
Steam turbine connections
Boiler feed systems
Flue gas ducting
Water Treatment
Large diameter water mains
Desalination plants
Wastewater systems
Available Configurations
Standard Options
Weld Neck - For high-stress systems
Blind - For pipe end closures
Lap Joint - For systems requiring frequent disassembly
Special Coatings - Including FBE and zinc
Custom Options
Reinforced Hubs - For extra wall thickness
Clad Construction - Carbon steel with SS overlay
Insulating Kits - For cathodic protection
Non-Standard Drilling - To match existing flanges
Why Choose SSM B16.47 Flanges?
• Complete In-House Manufacturing - From forging to final machining
• ASME U-Stamp Certification - For pressure vessel applications
• Global Logistics Network - Timely delivery worldwide
• Technical Support - Engineering calculations available
Request Your Quote Today
Our engineering team provides:
Series selection guidance
Pressure rating verification
Material grade recommendations
Dimensional compatibility checks
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