Can API 6A flanges be used on a pressure vessel designed according ASME VIII div.1
Can API 6A flanges be used on a pressure vessel designed according ASME VIII div.1
(OP)
Dear All,
I want to design a pressure vessel according to ASME VIII div.1 suitable for Pdesign=690 barg and Tdesign= 38oC, choice of pressure vessel material can be any material as long as the design conditions are met.
However there are no ASME flanges for these design conditions but I can use API-6A flanges.
Does this mean that I can not design the pressure vessel according ASME VIII div.1 as API flanges can not be used on a pressure vessel designed according to ASME VIII div.1.
Is my reasoning correct ? and what presure vessel design code can I use to design a pressure vessel with flanges that meet the Pdesign=690 barg and Tdesign= 38oC ?
Does anyone know ?
Best regards
VesselFred
I want to design a pressure vessel according to ASME VIII div.1 suitable for Pdesign=690 barg and Tdesign= 38oC, choice of pressure vessel material can be any material as long as the design conditions are met.
However there are no ASME flanges for these design conditions but I can use API-6A flanges.
Does this mean that I can not design the pressure vessel according ASME VIII div.1 as API flanges can not be used on a pressure vessel designed according to ASME VIII div.1.
Is my reasoning correct ? and what presure vessel design code can I use to design a pressure vessel with flanges that meet the Pdesign=690 barg and Tdesign= 38oC ?
Does anyone know ?
Best regards
VesselFred





RE: Can API 6A flanges be used on a pressure vessel designed according ASME VIII div.1
The only complication is that the flange temperature/pressure rating is not recognized by ASME VIII-1. So, you would have to perform an Appendix 2 calculation to justify the use of these flanges. The calculation would be performed with all of the geometry from API-6A.
There is no guarantee however that it would pass the calculation. I'm not familiar with API-6A flanges, but I know for example that many ASME B16.5 flanges fail the Appendix 2 calculations at the upper ends of their pressure/temperature ratings. If you're not pushing these flanges to the upper end of their typical pressure range use, you should be okay.
RE: Can API 6A flanges be used on a pressure vessel designed according ASME VIII div.1
Best regards
VesselFred
RE: Can API 6A flanges be used on a pressure vessel designed according ASME VIII div.1
Or did you mean 38 Deg C? eng tips doesn't do degree symbols very well....
You could also look a the compact flange range from something like Norsok / DNV. similar pressure ratings but a lot smaller.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Can API 6A flanges be used on a pressure vessel designed according ASME VIII div.1
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Can API 6A flanges be used on a pressure vessel designed according ASME VIII div.1
I work for one of the manufacturers, so I am not supposed to solicit but you may want to visit the following company on the web:
Grayloc
Galperti
LTS Energy
RE: Can API 6A flanges be used on a pressure vessel designed according ASME VIII div.1
Indeed the temperature is 38 Deg C so API 10000 will do.
Rtmorgan:
First I want to see if the API flange will pass the appendix 2 calculation in ASME VIII-div.1
Thanks all for your response, appreciate it !!
RE: Can API 6A flanges be used on a pressure vessel designed according ASME VIII div.1