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Thread: Equivalent bolt dimensions for flanges

  1. #1
    Associate Engineer
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    Jun 2012
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    Equivalent bolt dimensions for flanges

    The ANSI and AWWA flange standards ( like ANSI B 16.5, AWWA C 207) gives the sizes of bolt dimensions in inches. I would like to specify the bolt dimensions in mm. What is the applicable ANSI standard which indicates for the full range of bolt sizes (corrsponding to sizes available in flange standards) and gives dimensions in mm and not in inches.

  2. #2
    Technical Fellow
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    Feb 2011
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    Ummmm, that would be an ISO equivalent Standard, no?

  3. #3
    Lead Engineer RWOLFEJR's Avatar
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    Mar 2011
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    I think you're looking for ANSI B1.13M-1983...?

    Might want to grab yourself a copy of "Machinery's Handbook?" It's a GREAT book to have handy...!

  4. #4
    Administrator Kelly Bramble's Avatar
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    Are you looking for a reference with both inches and mm?

    See: ANSI B16.5 Flange Dimensional Design Data

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