Here is a table of flange dimensions in American standard (ANSI/ASME B16.5):

Size (inches)Pipe Outside Diameter (inches)Slip-On Flange OD (inches)Bolt QuantityBolt Diameter (inches)
1/20.841.3840.38
3/41.051.6940.44
11.322.0040.44
1-1/41.662.3840.50
1-1/21.902.7540.50
22.383.5040.62
2-1/22.884.1240.62
33.504.8840.62
3-1/24.005.3880.62
44.506.0080.62
55.567.5080.75
66.638.6280.75
88.6311.7580.88
1010.7513.75120.88
1212.7515.88121.00
1414.0017.50121.00
1616.0019.62161.00
1818.0021.75161.12
2020.0023.75201.25
2424.0028.00201.25
American standard (ANSI/ASME B16.5) pipe flange size chart

This table includes common pipe flange sizes found in the ANSI/ASME B16.5 standard. Please note that specific size selection should be based on the relevant standards and requirements. Consult the specific requirements and follow appropriate engineering practices when selecting and utilizing pipe flanges.

Here is a table of flange dimensions in ANSI/ASME B16.47 standard:

Size (inches)Pipe Outside Diameter (inches)Welding Neck Flange OD (inches)Bolt QuantityBolt Diameter (inches)
2626.0031.00241.25
3030.0035.00241.25
3636.0041.00241.50
4242.0047.00241.50
4848.0053.00241.75
5252.0057.00281.75
6060.0065.00282.00
6666.0071.00322.00
7272.0077.00322.25
8484.0089.00362.25
9696.00101.00402.50
108108.00113.00442.50
120120.00125.00482.75
ANSI/ASME B16.47 standard pipe flange size chart

This table provides information on welding neck flange dimensions in ANSI/ASME B16.47 standard. Please note that specific size selection should be based on the relevant standards and requirements. Consult the specific requirements and follow appropriate engineering practices when selecting and utilizing pipe flanges.

Here is a table of flange dimensions in European standards (EN 1092-1):

Size (mm)Outside Diameter (mm)Number of Bolt HolesBolt Diameter (mm)Bolt Hole Diameter (mm)Pitch Diameter (mm)
DN 15954151465
DN 201054151475
DN 251154151485
DN 3214041818100
DN 4015041818110
DN 5016541818125
DN 6518541818145
DN 8020081818160
DN 10022081818180
DN 12525081818210
DN 15028582222240
DN 20034082222295
DN 250395122226355
DN 300445122226410
DN 350505162226470
DN 400565162630525
DN 450615202630585
DN 500670202633640
DN 600780203036755
DN 700895243036865
DN 8001015243339975
European standards (EN 1092-1) pipe flange size chart

Please note that this table only includes a few selected sizes. The actual dimensions for each flange size may vary, so it is important to refer to the EN 1092-1 standard for specific requirements.


Lewis Liu

Hello, I am Lewis Liu, a professional sales engineer with over ten years of experience in the flange fittings industry. I am highly knowledgeable in flange selection, installation, and maintenance. I am passionate about providing customers with the best solutions to ensure their pipeline systems run smoothly, safely, and reliably.

If you have any questions or concerns regarding flange fittings for your pipelines, whether it’s about selection, material choice, specification requirements, or any other aspect, please feel free to contact me at any time. I am committed to offering professional advice and assistance to help you make informed decisions and meet your needs.

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