How to determine custom dimensions flange?

[takiyasamsama]

Hi,

How do we determine the BCD, thickness, and all other dimensions for a flange? Say that I have a 83 in. ID vessel requires bolted flange. So how do we determine the dimensions of the flange?

Thanks

 

[Spoonful]

Please see ASME VIII DIV 1, appendix 2 or appendix Y

 

[saplanti]

AWWA C207 flanges may give you some idea about the dimensions close to the diameter of yours, Check the following link:

http://www.google.com.au/url?sa=t&r...cd=7&cad=rja&uact=8&ved=0CEcQFjAG&url=http://

http://www.friulanaflange.it/eng/pd...F625qJkx5U1H7mhLKN5l-LA&bvm=bv.86475890,d.dGc

The selection of flange dimensions are simply economical and stress related. This may require a couple iteration with selected dimensions. You need to build/obtain a spreadsheet to go through the process for code compliance.

 

[saplanti]

Here is another one:

http://www.google.com.au/url?sa=t&r...cd=8&cad=rja&uact=8&ved=0CE0QFjAH&url=http://

http://www.rjsales.com/products/ans...a-UTAi2UIihysaqiCZ8988A&bvm=bv.86475890,d.dGc

 

[saplanti]

Additionally, you need to be careful with your bolt tightening procedure. The available space should be suitable for the tightening equipment.