Help needed on design of a rectangular to circular cone section.
Help needed on design of a rectangular to circular cone section.
(OP)
Hi everyone first time poster here wondering if any of you could help me out on a little problem I am having. I am currently trying to design a conical section that goes from a rectangular cross section with radiused corners on one end to a circular weld neck flange on the other end. I am having a hard time finding any clear cut way of designing this section.
Appendix 13 in Section VIII of the ASME code doesn't have any mention of even rectangular cones let alone one with a transition to circular at the end. The pressure in the cone is only about 3 psig so I know that it won't be a really thick section but I am thinking that if I just assume that it is a regular rectangular section and not a cone that may be making it too thick.
Does anyone have any experience with this kind of section? Any help you could give me would be very appreciated, thank you.
Appendix 13 in Section VIII of the ASME code doesn't have any mention of even rectangular cones let alone one with a transition to circular at the end. The pressure in the cone is only about 3 psig so I know that it won't be a really thick section but I am thinking that if I just assume that it is a regular rectangular section and not a cone that may be making it too thick.
Does anyone have any experience with this kind of section? Any help you could give me would be very appreciated, thank you.





RE: Help needed on design of a rectangular to circular cone section.
Unfortunately, Appendix 13 is probably going to give you something thicker that you really want, or perhaps even need. You do not say whether any Codes or standards apply, and this willl need to be considered in your design approach. FEA may be an option, as may be some kind of simplified analysis. It depends.
Regards,
Mike
RE: Help needed on design of a rectangular to circular cone section.
RE: Help needed on design of a rectangular to circular cone section.
There is a little too much going on there.
Regards,
Mike
RE: Help needed on design of a rectangular to circular cone section.
RE: Help needed on design of a rectangular to circular cone section.
Your biggest stress will be across the largest flat area: the round end is going to have lowest hoop pressure and the lowest stress from fluid flow transient stress, and will be best able to resist that stress through its internal shape.
So your safest design is to assume a rectangular PV (flat sides) at your highest internal (?) pressure. Are you positive there is no chance of ever pulling a vacuum in there? If 3 PSIG is the operating pressure, potential vauums might be much higher than pressures.