ANSI B16.5 Class 600 Flanges | Threaded

ANSI B16.5 Class 400 threaded flanges have built-in threads and do not require welding. They can be directly connected to pipes or fittings with corresponding external threads. According to the ANSI B16.5 (American National Standards Institute) standard, these flanges are capable of withstanding a pressure of 600 pounds per square inch gauge (PSIG). Threaded flanges are easy to install and provide good sealing performance, but compared to welded flanges, they have lower strength and rigidity, making them more suitable for use in low-pressure piping systems, such as heating, ventilation, and air conditioning (HVAC), as well as in industries that value simplicity.

YANHAO ANSI B16.5 threaded flanges are made of stainless steel, carbon steel, and alloy steel, offering high corrosion resistance and temperature resistance. We also provide additional components such as gasketed flanges, bolts, nuts, flange covers, or flange cover gaskets. We typically offer standard flanges; if you need to order special types of flanges, please get in touch with our experts.

ANSI B16.5 Class 600(Threaded) dimensions

  • All dimensions are in inches.
  • These flanges will be furnished with a 1/4″ raised face unless otherwise specified
Nominal Pipe SizeOutside Diameter (O)Bolt Circle (W)Raised Face Diameter (R)Number of HolesDiameter of HolesHub Diameter (X)Thickness (T)Length Thru Hub (Y)Approximate Weight (lbs)
1/23.752.621.3840.631.500.560.882
3/44.623.251.6940.751.880.621.003
14.883.502.0040.752.120.691.064
1 1/45.253.882.5040.752.500.811.125
1 1/26.124.502.8840.882.750.881.257
26.505.003.6280.753.311.001.449
2 1/27.505.884.1280.883.941.121.6213
38.256.625.0080.884.621.251.8116
3 1/29.007.255.50815.251.381.9421
410.758.506.19816.001.502.1237
513.0010.507.3181.137.441.752.3863
614.0011.508.50121.138.751.882.6280
816.5013.7510.62121.2510.752.193.00115
1020.0017.0012.75161.3813.502.503.38170
1222.0019.2515.00201.3815.752.623.62200
1423.7520.7516.25201.517.002.753.69230
1627.0023.7518.50201.6319.503.004.19330
1829.2525.7521.00201.7521.503.254.62400
2032.0028.5023.00241.7524.003.505.00510
2234.2530.6225.25241.8826.253.755.25590
2437.0033.0027.2524228.254.005.50730

Threaded flanges

Threaded flanges are a commonly used type of flange in industrial applications. Similar to slip-on flanges, threaded flanges have tapered threads designed to connect with pipes that have corresponding external threads. The advantage of these flanges is that they can be connected without welding. Threaded flanges typically feature raised face, flat face, or RTJ (Ring Joint) faces. When a raised face is required for threaded flanges, the standard height for threaded flanges is 1/16″ for flanges rated below Class 400. For threaded flanges rated Class 400 and above, the standard raised face height is 1/4″. The size range of threaded flanges extends from 1/2″ (DN15) to 100″ (DN2500), with varying numbers and diameters of bolt holes, as well as different flange outer diameters, hub diameters, flange thicknesses, and bolt hole diameters.

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FAQ

Any butt-weld fitting or weld-neck flange can be directly welded to any other butt-weld fitting or weld-neck flange without the need for any extra piece of pipe (Pup piece) between them.

The Weld Neck Flange offers increased strength under higher pressures, subzero or elevated temperatures that cause line expansion or retraction, or other variable forces. The Slip On Flange is connected to the pipe by two welds, one on the back side of the Flange and one on the inside of the Flange.

Weld Neck Flanges, It gives the highest level of joint integrity as it is butt-welded with a pipe. These types of flanges are used in high-pressure and temperature application.

Any butt-weld fitting or weld-neck flange can be directly welded to any other butt-weld fitting or weld-neck flange without the need for any extra piece of pipe (Pup piece) between them.

The Weld Neck Flange offers increased strength under higher pressures, subzero or elevated temperatures that cause line expansion or retraction, or other variable forces. The Slip On Flange is connected to the pipe by two welds, one on the back side of the Flange and one on the inside of the Flange.

Weld Neck Flanges, It gives the highest level of joint integrity as it is butt-welded with a pipe. These types of flanges are used in high-pressure and temperature application.