Flange size

2017-10-27View Original

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Hello everyone, may I ask what sizes do the 1-inch, 2-inch, 3-inch, and 4-inch flanges we usually refer to actually mean?

Reply #22017-10-27

It refers to the inner diameter of the flange, DN. For example: a 2-inch flange, DN50, connected to 2-inch piping; the actual inner diameter of the flange is 57 mm

Reply #32017-10-27

Take a look at the corresponding relationship in the image

Reply #42017-10-28

1 inch refers to an inch, with 1 inch = 2.5 CM, which is what is known as DN25

Reply #52017-10-28

Inner diameter size: 1 inch = 2.5399999961392 centimeters; flanges of the same size but different grades vary as well

Reply #62018-12-22

The last edit to this post was made by Yunmu on 2019-1-28 at 09:52. 1 inch refers to an inch unit, with 1 inch equaling 2.5 CM; this is what is referred to as DN25

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Flange size

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