ASME B16.47 Series B Class 75 Welding Neck Flanges


YANHAO is a manufacturer, supplier and exporter of ASME B16.47 Series A Class 75 Butt Weld 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 75 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)
2630.0028.5027.75360.75Specified by purchaser26.0626.620.311.312.3180
2832.0030.5029.75400.75Specified by purchaser28.0628.620.311.312.4485
3034.0032.5031.75440.75Specified by purchaser30.0630.620.311.312.5690
3236.0034.5033.75480.75Specified by purchaser32.0632.620.311.382.75105
3438.0036.5035.75520.75Specified by purchaser34.0634.620.311.382.88110
3640.6939.0638.00400.88Specified by purchaser36.0636.810.381.443.38145
3842.6941.0640.00400.88Specified by purchaser38.0638.810.381.503.50160
4044.6943.0642.00440.88Specified by purchaser40.0640.810.381.503.62170
4246.6945.0644.00480.88Specified by purchaser42.0642.810.381.563.75185
4449.2547.3846.25361.00Specified by purchaser44.0644.880.381.694.12230
4651.2549.3848.25401.00Specified by purchaser46.0646.880.381.754.25245
4853.2551.3850.25441.00Specified by purchaser48.0648.880.381.814.38270
5055.2553.3852.25441.00Specified by purchaser50.0650.940.381.884.56290
5257.3855.5054.25481.00Specified by purchaser52.0652.940.381.884.75310
5459.3857.5056.25481.00Specified by purchaser54.0655.000.381.944.94340
5662.0059.8858.50401.12Specified by purchaser56.0657.120.442.005.31400
5864.0061.8860.50441.12Specified by purchaser58.0659.120.442.065.44430
6066.0063.8862.50441.12Specified by purchaser60.0661.120.442.195.69475
  • (A)All dimensions are in inches.
  • (B)These flanges will be furnished with a 1/16″ raised face unless otherwise specified.
  • (C)Standard Bore will be furnished unless otherwise specified. For more diameter of holes, 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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