Flanges are critical components in pipeline systems, ensuring secure connections between pipes, valves, and equipment. ASME B16.47 and ASME B16.5 are two widely used flange standards, but they serve different applications. Understanding their differences helps in selecting the right flange for your project.
Weld Neck Flange RF ASME B16.47A A105
Key Differences Between ASME B16.47 and ASME B16.5
✔ Size Range:
ASME B16.5 covers small to medium-sized flanges from ½” to 24″ in diameter.
ASME B16.47 is for large-diameter flanges, covering sizes from 26″ to 60″.
✔ Typical Applications:
ASME B16.5 is commonly used in standard piping systems for industries like oil & gas, chemical processing, and power plants.
ASME B16.47 is used in large pipeline networks, such as offshore platforms, refineries, and heavy industrial plants.
✔ Flange Pressure Ratings:
Both standards include pressure classes 150, 300, 400, 600, 900, and higher, but ASME B16.47 is specifically designed for higher-stress, large-diameter connections.
When to Choose ASME B16.47 vs. ASME B16.5?
ASME B16.5 A182 F316L weld neck flanges
Use ASME B16.5:
✔ Your pipeline system requires flanges up to 24″ in diameter.
✔ The application is for standard industrial pipelines with moderate pressures.
✔ You need a flange that conforms to ASME B16.5 pressure classes and dimensions.
Use ASME B16.47:
✔ You need large-diameter flanges (26″–60″) for heavy-duty applications.
✔ The pipeline system involves high-pressure, high-temperature, or critical fluid transport.
✔ You require a flange standard that matches ASME B16.47 pressure classes and bolting dimensions.
ASME B16.47A A105N RF blind flange
Series A vs. Series B: How to Choose the Right B16.47 Flange?
ASME B16.47 flanges are divided into Series A and Series B, each with different design characteristics:
✔ Series A:
Thicker, heavier, and stronger than Series B.
Provides better stress distribution and higher load-bearing capacity.
Preferred for high-pressure applications.
✔ Series B:
Lighter and more compact than Series A.
Typically used for lower-pressure systems.
Designed as a replacement for MSS SP-44 flanges.
Recommendation:
Choose Series A for high-pressure and heavy-duty applications.
Choose Series B if weight reduction and cost savings are priorities.
Haihao Group: Your Trusted Flange Manufacturer
At Haihao Group, we manufacture high-quality ASME B16.47 and ASME B16.5 flanges, ensuring:
✔ Precision machining for exact dimensions
✔ Strict quality control, including NDT and material verification
✔ Customization options for various pressure classes and materials
Need ASME-compliant flanges? Contact Haihao Group today for expert solutions! Email:sales@haihaogroup.com
