ASME B16.47 Flanges (Large Diameter Steel Flanges)

The ASME B16.47 Flange Standards are appropriate for the NPS 26 to NPS 60 pipe range. Covers in rating classes 75, 150, 300, 400, 600, and 900.

With 20 years of production experience, YANHAO offers a wide variety of ASME/ANSI flanges at competitive factory prices.

YANHAO offers:

  • ASME B16.47 Flange, Series A, Class 150, 300, 400, 600, 900.
  • ASME B16.47 Flange, Series B, Class 75, 150, 300, 400, 600, 900.

NPS: Nominal Pipe Size, a North American standard size system for pipes meant to endure extremes of pressure and temperature. For example, when you say NPS 26, which means 26” pipe, the 26” is the nominal size of that pipe.

ASME B16.47 Flange (Large Diameter Steel Flange) Reference Image
ASME B16.47 Flange (Large Diameter Steel Flange) Reference Image

About ASME B16.47 Flange Standard

The American Society of Mechanical Engineers - Setting the Standard
The American Society of Mechanical Engineers: Setting the Standard

The ASME B16.47 Flange Standard provides two series of flange dimensions.

  • Series A is for general-use flanges.
  • Series B is for compact flanges that, in most cases, have smaller bolt circle diameters than Series A flanges.

These two series of flanges are, in general, not interchangeable. The user should recognize that some flanged valves, equipment bolted between flanges, and flanged equipment may be compatible with only one series of these flanges

Classes 75, 150, and 300 flanges are regularly furnished with a 2 mm (0.06 in.) raised face. Classes 400, 600, and 900 flanges are regularly furnished with a 7 mm (0.25 in.) raised face.

The thickness of the raised face in all cases is in addition to the minimum flange thickness. It is recommended that the Class 75 flanges be used only with a 2 mm (0.06 in.) raised face or flat face.

About YANHAO

Aerial view of YANHAO Factory
Aerial view of YANHAO Factory

YANHAO is a flange manufacturer located in Hebei Province, China. It is one of the few professional flange suppliers in China.

We have many years of experience in flange production and have multiple flange production lines. We have sufficient stock of raw materials, rich inventory, fast delivery, and can ship within three days. At the same time, the price is affordable. You are welcome to consult and purchase!

In addition, we can provide a variety of bespoke flanges and pipe fittings. Customers can give drawings or samples, and our company will produce them to fit your specific requirements.

Check Our Certificates

We have many other certificates. If you need to check them, please feel free to contact our sales staff. We will send them to you via email.

The American Society of Mechanical Engineers (ASME) and the American National Standards Institute (ANSI) developed ASME/ANSI B16.47, a universal flange standard that specifies large-diameter steel pipe flanges with sizes ranging from NPS 26 to NPS 60 and provides dimensions and ratings in both metric and imperial units.

Series A and Series B are suitable for different pressure pipelines. Series A is mostly suitable for high-pressure environments, while Series B is suitable for low-pressure environments.

In simple terms: Series A is for general-use flanges. Series B is for compact flanges that have smaller bolt circle diameters than Series A flanges.

ASME/ANSI B16.47 flanges are mainly of large diameter and typically range in size from 26 inches to 60 inches, with pressure ratings ranging from Class 75-900.

The American Society of Mechanical Engineers (ASME) developed ASME B16.47, a standard that primarily outlines the dimensions, composition, and design specifications for large-diameter steel flanges.

This standard covers flanges with NPS (nominal pipe diameter) from 26 inches to 60 inches.

“B16” is the number of the ASME standard document, and “47” is the specific number of the standard.

Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue and Groove (T&G), Male and Female (M&F), etc.

ASME/ANSI B16.47 flanges are commonly used in industrial pipelines with larger diameters, especially in pipeline systems that require handling high-pressure, high-temperature, and corrosive media.