ASME/ANSI B16.5 Threaded Flanges

Our company provides ASME/ANSI B16.5 Threaded Flanges.

The threaded flange has a threaded bore, which allows it to be screwed onto the pipe. It is commonly used in low-pressure applications and is easy to install and remove. However, threaded flanges may not be suitable for high-pressure applications due to the risk of leaks from the threads.

  • ASME B16.47 Flange  Class 150-900 Series A – 26″to 60″
  • ASME B16.47 Flange  Class 75-900 Series B – 26″to 60″

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ASME/ANSI B16.5 Threaded Flanges

ASME/ANSI B16.5 Class 150 Threaded Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/16″ raised face unless otherwise specified. For more alternate flange facings, please click here!

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)
1/23.502.381.3840.621.190.380.561
3/43.882.751.6940.621.500.440.562
14.253.122.0040.621.940.500.622
1 1/44.623.502.5040.622.310.560.753
1 1/25.003.882.8840.622.560.620.813
26.004.753.6240.753.060.690.945
2 1/27.005.504.1240.753.560.811.067
37.506.005.0040.754.250.881.128
3 1/28.507.005.5080.754.810.881.1911
49.007.506.1980.755.310.881.2513
510.008.507.3180.886.440.881.3815
611.009.508.5080.887.560.941.5019
813.5011.7510.6280.889.691.061.6930
1016.0014.2512.75121.0012.001.121.8843
1219.0017.0015.00121.0014.381.192.1264
1421.0018.7516.25121.1215.751.312.1990
1623.5021.2518.50161.1218.001.382.4498
1825.0022.7521.00161.2519.881.502.62130
2027.5025.0023.00201.2522.001.622.81165
2229.5027.2525.25201.3824.001.753.06185
2432.0029.5027.25201.3826.121.813.19220

ASME/ANSI B16.5 Class 300 Threaded Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/16″ raised face unless otherwise specified. For more alternate flange facings, please click here!

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)
1/23.752.621.3840.631.500.500.812
3/44.623.251.6940.751.880.560.943
14.883.502.0040.752.120.621.003
1 1/45.253.882.5040.752.500.691.004
1 1/26.124.502.8840.882.750.751.136
26.505.003.6280.753.310.811.257
2 1/27.505.884.1280.883.940.941.4410
38.256.625.0080.884.621.061.6313
3 1/29.007.255.5080.885.251.121.6917
410.007.886.1980.885.751.191.8222
511.009.257.3180.887.001.311.9428
612.5010.628.50120.888.121.382.0039
815.0013.0010.62121.0010.251.562.3858
1017.5015.2512.75161.1312.621.812.5681
1220.5017.7515.00161.2514.751.942.82115
1423.0020.2516.25201.2516.752.062.94165
1625.5022.5018.50201.3819.002.193.19190
1828.0024.7521.00241.3821.002.313.44250
2030.5027.0023.00241.3823.122.443.69315
2233.0029.2525.25241.6325.252.563.94370
2436.0032.0027.25241.6327.622.694.13475

ASME/ANSI B16.5 Class 400 Threaded Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

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 1/29.007.255.5081.005.251.381.9421
410.007.886.1981.005.751.382.0026
511.009.257.3181.007.001.502.1231
612.5010.628.50121.008.121.622.2544
815.0013.0010.62121.1310.251.882.6967
1017.5015.2512.75161.2512.622.122.8891
1220.5017.7515.00161.3814.752.253.12130
1423.0020.2516.25201.3816.752.383.31180
1625.5022.5018.50201.5019.002.503.69235
1828.0024.7521.00241.5021.002.623.88285
2030.5027.0023.00241.6323.132.754.00345
2233.0029.2525.25241.7525.252.884.25405
2436.0032.0027.25241.8827.623.004.50510

ASME/ANSI B16.5 Class 600 Threaded Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

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

ASME/ANSI B16.5 Class 900 Threaded Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

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)
1/24.753.251.3840.881.500.881.254
3/45.123.501.6940.881.751.001.385
15.884.002.0041.002.061.121.628
1 1/46.254.382.5041.002.501.121.629
1 1/27.004.882.8841.132.751.251.7512
28.506.503.6281.004.121.502.2525
2 1/29.627.504.1281.134.881.622.5036
39.507.505.0081.005.001.502.1226
411.509.256.1981.256.251.752.7553
513.7511.007.3181.387.502.003.1283
615.0012.508.50121.259.252.193.38110
818.5015.5010.62121.5011.752.504.00170
1021.5018.5012.75161.5014.502.754.25245
1224.0021.0015.00201.5016.503.124.62325
1425.2522.0016.25201.6317.753.385.12400
1627.7524.2518.50201.7520.003.505.25425
1831.0027.0021.00202.0022.254.006.00600
2033.7529.5023.00202.1324.504.256.25730
2441.0035.5027.25202.6329.505.508.001400

ASME/ANSI B16.5 Class 1500 Threaded Flanges

(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

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)
1/24.753.251.3840.881.500.881.254
3/45.123.501.6940.881.751.001.385
15.884.002.0041.002.061.121.628
1 1/46.254.382.5041.002.501.121.629
1 1/27.004.882.8841.132.751.251.7512
28.506.503.6281.004.121.502.2525
2 1/29.627.504.1281.134.881.622.5036

ASME/ANSI B16.5 Class 1500 Threaded Flanges

(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

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)
1/24.753.251.3840.881.500.881.254
3/45.123.501.6940.881.751.001.385
15.884.002.0041.002.061.121.628
1 1/46.254.382.5041.002.501.121.629
1 1/27.004.882.8841.132.751.251.7512
28.506.503.6281.004.121.502.2525
2 1/29.627.504.1281.134.881.622.5036

Here is a table outlining the specifications and characteristics of ASME/ANSI B16.5 Threaded Flanges:

Specification/FeatureDescription
StandardASME/ANSI B16.5 Threaded Flange.
TypeThreaded Flange – A type of flange with internal threads that allow it to be screwed onto the external threads of pipes or fittings, providing a secure connection.
Pressure RatingsAvailable in different pressure classes, such as 150, 300, 600, 900, 1500, 2500, etc., to accommodate varying pressure requirements.
Size RangeTypically available in sizes ranging from 1/2 inches to 24 inches or larger, suitable for various pipe and equipment sizes.
MaterialsASME/ANSI B16.5 Threaded Flanges can be manufactured from materials like carbon steel, stainless steel, alloy steel, and more, chosen based on application requirements.
Facing TypesCommon facing types include Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ), and Male and Female (M&F) facings, impacting sealing methods.
Bolt Hole Quantity and DiameterThe number and diameter of bolt holes vary with flange size and pressure rating, facilitating flange connection.
Connection MethodASME/ANSI B16.5 Threaded Flanges create a secure connection by screwing the flange onto the external threads of pipes or fittings.
Application AreasThreaded Flanges are commonly used in industries where a reliable threaded connection is required, such as plumbing, small-bore piping, and low-pressure applications.
Standards and CodesASME/ANSI B16.5 Threaded Flanges adhere to standards set by the American National Standards Institute (ANSI) and nominal pipe size (NPS) standards, such as ANSI B16.5.
Seal TypesThreaded Flanges commonly use gaskets or O-rings for sealing, with the choice of seal type depending on the application and pressure rating.
Accessories and AttachmentsSome applications may require additional components such as flange gaskets, bolts, nuts, and flange cover gaskets.
Inspection and TestingASME/ANSI B16.5 Threaded Flanges typically undergo a series of inspections and tests to ensure they meet quality and performance requirements, in compliance with standards.
Marking and CertificationThreaded Flanges should be marked with the manufacturer’s identification, size, class, material, and other relevant information. Some flanges may require specific certifications such as PED or ASME.
Installation and MaintenanceProper installation and regular maintenance of Threaded Flanges, including thread integrity, bolt torque, flange face cleaning, and seal replacement, are crucial for system integrity and performance.
Application StandardsIn specific industries and applications, there may be industry-specific Threaded Flange application standards that need to be adhered to for safety and performance.
ASME/ANSI B16.5 Threaded Flanges Main Features and Specifications Table

This table provides a comprehensive overview of ASME/ANSI B16.5 Threaded Flanges, covering key specifications, characteristics, and additional considerations. Specific details and requirements may vary based on the chosen flange size, pressure rating, and material.

ASME/ANSI B16.5 Threaded Flanges are a type of flange used to connect two pipes together using a threaded joint. They are commonly used in low-pressure and low-temperature applications, where welding may not be feasible or desirable.

The Threaded Flange has a female thread on the inside surface, which allows the end of the pipe to be screwed into the flange, creating a threaded joint. The Threaded Flange is then tightened using a wrench, which creates a strong, secure connection between the pipe and the flange.

ASME/ANSI B16.5 Threaded Flanges are typically used in applications such as plumbing, heating, and air conditioning systems, as well as in water and sewage treatment plants. They are also used in applications where frequent disassembly is required for maintenance or cleaning.

ASME/ANSI B16.5 Threaded Flanges are available in a range of sizes from 1/2 inch to 24 inches, and are manufactured to meet the requirements of the ASME B16.5 standard. The standard specifies the dimensions, tolerances, marking, and testing requirements for the flange to ensure the quality and performance of the product.

The design of the Threaded Flange ensures that the pipe and flange are aligned properly during installation, which minimizes the risk of leaks and other problems. This makes them a popular choice in applications where a reliable, leak-free connection is critical.

ASME/ANSI B16.5 Threaded Flanges are available in a range of materials, including carbon steel, stainless steel, and alloy steel, among others. The material selection depends on the specific requirements of the application, such as the temperature, pressure, and corrosion resistance of the piping system.

Proper selection, installation, and maintenance of ASME/ANSI B16.5 Threaded Flanges are crucial to ensure a safe and reliable operation of the piping system. Care must be taken to ensure that the thread on the flange matches the thread on the pipe, and that the flange is tightened to the correct torque specifications. Failure to do so can result in leaks or other problems that can compromise the integrity of the piping system.

In summary, ASME/ANSI B16.5 Threaded Flanges are a type of flange commonly used in low-pressure and low-temperature applications, where welding may not be feasible or desirable. They provide a strong and secure connection between the pipe and the flange, and are designed to be used in systems that require frequent disassembly for maintenance or cleaning. Proper selection, installation, and maintenance of ASME/ANSI B16.5 Threaded Flanges are crucial to ensure a safe and reliable operation of the piping system.

ASME/ANSI B16.5 Threaded Flanges are widely used in low-pressure piping systems, as no welding is involved while connecting the flanges to pipes or other equipment. However, the Female Threaded flange may be welded around the joint after assembly, but it is not considered a satisfactory method of increasing its applications.

Threaded connections are almost the polar opposite of flange connections. Rather than fitting pieces together using multiple parts, threaded connections are rimmed with matching grooves, one on the outside of a piece and the other on the inside.

The key types of flanges are the welding neck, long welding neck, slip-on, socket weld, lap joint, and threaded, and blind flanges. In addition to these standard flanges, some special ones exist, called Weldoflange/Nipoflange and Elboflange, swivel flange, expander/reducer flange, and orifice flanges.

The threaded flange design (also called a ‘screwed flange’) uses a screw thread to connect the flange to a pipe. A male thread is cut onto a pipe end whilst a female thread is cut into the bore of the flange; the male threaded pipe is then screwed into the female threaded flange.

A union is a threaded fitting that allows the pipework to be separated and reconnected without any horizontal movement in the pipe. It can be a standalone pipe fitting connecting two pieces of pipe, or an integral part of another fitting (such as a ball valve) that allows it to be separated.

Threaded connections are often referred to as a process connection type. For Dwyer product specifications, this connection type is typically NPT (National Pipe Thread), which is an American standard thread. These connections allow products to be installed directly into piping or with the use of threaded fittings.