ASME B16.47 Series B Class 900 Welding Neck Flanges


YANHAO is a manufacturer, supplier and exporter of ASME B16.47 Series A Class 900 Weld Neck Flanges suitable for large diameter pipes from NPS 26 to NPS 60. B Series flanges are medium-pressure compact flanges and in most cases, these flanges have a smaller bolt circle diameter than A Series flanges. The welded neck design adds greater strength and stability, capable of withstanding greater pipe loads, and can be used in general household, commercial and industrial application

Yanhao’s ASME B16.47 B series casting flanges are made of stainless steel, carbon steel, and alloy steel. We usually supply standard flanges; if you need to order a special model and bore size, please contact our experts.

Custom Flanges

Class 900 dimensions | ASME B16.47 Series B Flange

Nominal Pipe SizeOutside Diameter (O)Bolt Circle (W)Raised Face Diameter (R)Number of HolesDiameter of HolesBore (B)Top of Hub (A)Hub Diameter (X)Minimum Fillet Radius (r)Minimum Thickness (T)Length Thru Hub (Y)Approximate Weight (lbs)
2640.2535.5030.00202.62Specified by purchaser26.0029.250.445.3110.191050
2843.5038.2532.25202.88Specified by purchaser28.0031.380.505.8110.881520
3046.5040.7534.50203.12Specified by purchaser30.0033.500.506.1211.381820
3248.7543.0036.50203.12Specified by purchaser32.0035.750.506.3111.942065
3451.7545.5039.00203.38Specified by purchaser34.0037.880.566.7512.562450
3653.0047.2540.50243.12Specified by purchaser36.0040.000.566.8112.812520
3857.5050.7543.25203.62Specified by purchaser38.0042.250.757.5013.883385
4059.5052.7545.75243.62Specified by purchaser40.0044.380.817.7514.313620
4261.5054.7547.75243.62Specified by purchaser42.0046.310.818.1214.623960
4464.8857.6250.00243.88Specified by purchaser44.0048.620.888.4415.384300
4668.2560.5052.50244.12Specified by purchaser46.0050.880.888.8816.184640
4870.2562.5054.50244.12Specified by purchaser48.0052.880.949.1916.504980
  • All dimensions are in inches.
  • These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

Weld Neck Flange

Weld Neck Flange is a type of industrial pipe connection, especially used in pressure pipeline systems. Thanks to the high structural strength, sealing performance, corrosion resistance, and the characteristics of withstanding high temperature and pressure of the welding neck flange, it can be used for oil transportation pipelines, ship pipeline systems, and the transportation of raw materials in chemical plants, etc.

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ASME B16.47 Forged Flanges FLANGE CLASSES

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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.

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