Large Standard Flanges
Large Standard Flanges
(OP)
In vessel fabrication involving flanges between 26" and 60" diameter, class 150 or class 300, and not custom designed per appendix 2 it is common to use ANSI/ASME B16.47 flanges. My question is, are Series A (MSS SP-44) or Series B (API 605) flanges more commonly used, and why?





RE: Large Standard Flanges
If your vessel is to be installed in an existing plant facility, it is a wise practice to check the attached piping flanges to make sure you have the correct type and bolting dimensions. There could be an existing pipe with an "Appendix 2" flange, or a manufacturer's standard flange that doesn't match either Series A or B. If this is the case, you want to find that out immediately to prevent a potential embarrasing situation.
RE: Large Standard Flanges
I would like to add a few ponits to the post above.
Series A flanges are heavier than Series B flanges so if you have to buy a lot of them or if you need special metallurgy it can make a difference.
Series B flanges have more, smaller fasteners than the Series A flanges.
Series A includes corresponding dimensions for blind flange closures. Series B does not define a blind flange so you will have to design/build one if you need one.
Regards,
Gunnar
RE: Large Standard Flanges
RE: Large Standard Flanges
there is no standard for Orings: unless you find a flange manufacturer supplying a flange pair with Oring (this may happen for example in high vacuum applications) you must specify Oring material, diameter and groove.
Concerning the calculation, if you are allowed to use B16.5 flanges, you can go on without recalculation, provided the Oring groove is not larger than the groove specified by the standard.
Why don't you start a new thread for a new topic?
prex
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RE: Large Standard Flanges
RE: Large Standard Flanges
RE: Large Standard Flanges
RE: Large Standard Flanges
RE: Large Standard Flanges
Where can i get them ? ? ? Thanks a lot
RE: Large Standard Flanges
RE: Large Standard Flanges
RE: Large Standard Flanges