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June 6, 2023

ASME B16.47 is a standard set by the American Society of Mechanical Engineers (ASME) that specifies the requirements for large diameter steel flanges for use in high-pressure and high-temperature applications. The standard covers two types of flanges: Series A and Series B. This article will provide an overview of ASME B16.47 flanges, their types, specifications, and applications.

Types of ASME B16.47 Flanges ASME B16.47 flanges are available in two types: Series A and Series B. Series A flanges are equivalent to the API 605 flanges, while Series B flanges are equivalent to the MSS SP-44 flanges.

  1. Series A Flanges: These flanges have a larger diameter and a smaller bolt circle diameter than Series B flanges. They are used in applications where higher internal pressures are required.
  2. Series B Flanges: These flanges have a smaller diameter and a larger bolt circle diameter than Series A flanges. They are commonly used in lower pressure and temperature applications.

Specifications of ASME B16.47 Flanges ASME B16.47 flanges are available in a range of sizes, pressure ratings, and materials. The standard specifies the following requirements:

  1. Flange Sizes: ASME B16.47 flanges are available in sizes ranging from 26″ to 60″ for Series A flanges and from 26″ to 144″ for Series B flanges.
  2. Pressure Ratings: The pressure ratings for ASME B16.47 flanges range from Class 75 to Class 900 for Series A flanges and from Class 150 to Class 900 for Series B flanges.
  3. Materials: ASME B16.47 flanges are available in a range of materials, including carbon steel, stainless steel, and alloy steel. The material selection depends on the application requirements and environmental conditions.

Applications of ASME B16.47 Flanges ASME B16.47 flanges are commonly used in various industries, including:

  1. Oil and Gas: ASME B16.47 flanges are used in oil and gas pipelines to transport crude oil, natural gas, and other petroleum products.
  2. Chemical Processing: ASME B16.47 flanges are used in chemical processing plants to transport chemicals and other fluids.
  3. Power Generation: ASME B16.47 flanges are used in power generation plants to transport steam, water, and other fluids.
  4. Water Treatment: ASME B16.47 flanges are used in water treatment plants to transport treated water and other fluids.

Conclusion ASME B16.47 flanges are a standard set by ASME for large diameter steel flanges used in high-pressure and high-temperature applications. They are available in two types: Series A and Series B, with different diameter and bolt circle specifications. ASME B16.47 flanges are commonly used in various industries, including oil and gas, chemical processing, power generation, and water treatment. With the right selection of flange type, size, pressure rating, and material, pipelines and other systems can operate safely and efficiently.

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