TECHNICAL TUESDAY
How To Measure A Flange When You Can’t Measure PCD
When measuring a flange where it’s difficult to directly measure the Pitch Circle Diameter (PCD), you can still calculate it using the measurements of two adjacent holes
Based on the number of holes on the flange, you can multiply the distance between the holes by a specific factor to estimate the PCD. Here are the factors for different numbers of holes:
For 4 holes: Multiply the distance between two adjacent holes by 1.414.
For 8 holes: Multiply it by 2.613.
For 12 holes: Multiply it by 3.864.
For 16 holes: Multiply it by 5.126.
For example, let’s say you have a flange with 8 holes and a measurement of 90mm between two adjacent holes. To calculate the PCD, you would multiply 90 by 2.613, which gives you 235mm.
Using the calculated PCD and the internal measurement of the flange, you can refer to our flange identification chart to determine the flange type, which suggests this flange is a Table D or Table E flange.
Keep in mind that this method provides an estimation of the PCD and may not be as accurate as directly measuring it.
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July 26, 2022
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How To Measure A Flange When You Can’t Measure PCD
When measuring a flange where it’s difficult to directly measure the Pitch Circle Diameter (PCD), you can still calculate it using the measurements of two adjacent holes
Based on the number of holes on the flange, you can multiply the distance between the holes by a specific factor to estimate the PCD. Here are the factors for different numbers of holes:
For 4 holes: Multiply the distance between two adjacent holes by 1.414.
For 8 holes: Multiply it by 2.613.
For 12 holes: Multiply it by 3.864.
For 16 holes: Multiply it by 5.126.
For example, let’s say you have a flange with 8 holes and a measurement of 90mm between two adjacent holes. To calculate the PCD, you would multiply 90 by 2.613, which gives you 235mm.
Using the calculated PCD and the internal measurement of the flange, you can refer to our flange identification chart to determine the flange type, which suggests this flange is a Table D or Table E flange.
Keep in mind that this method provides an estimation of the PCD and may not be as accurate as directly measuring it.
Related Products
More Videos About Flanges
July 26, 2022
February 9, 2022
November 17, 2021
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