Pipe Cap elliptical ratio
Pipe Cap elliptical ratio
(OP)
I designed a vessel with B16.9 pipe cap as head. B16.9 said that the shape of these caps shall be ellipsoidal and shall conform to the requirements given in the ASME Boiler and Pressure Vessel Code. Which elliptical ratio should be indicate in MDR? thkx .





RE: Pipe Cap elliptical ratio
I can't believe that the forum can tolerate this behaviour and we can be held accomplices to potential unsafe design, by simply answering a naive? question.
RE: Pipe Cap elliptical ratio
In my opinion I would not record a ratio on the U-Form. UG-44 requires B16.9 to be calculated as straight seamless pipe. UG-27 calculations do not require a ratio to be used in the formulas and B16.9, Table 10 note (b), does not address a ratio.
I've been told that B16.9 pipe caps are not true 2:1 ellipsoidal heads and if that is the case then not sure how you can record 2:1 on U Form.
RE: Pipe Cap elliptical ratio
In my opinion I would not record a ratio on the U-Form. UG-44 requires B16.9 to be calculated as straight seamless pipe. UG-27 calculations do not require a ratio to be used in the formulas and B16.9, Table 10 note (b), does not address a ratio.
I've been told that B16.9 pipe caps are not true 2:1 ellipsoidal heads and if that is the case then not sure how you can record 2:1 on U Form.
RE: Pipe Cap elliptical ratio
RE: Pipe Cap elliptical ratio
This question will mainly arise when we need to perform any calculation for the standard cap in case of any opening on the same. Any idea if 2:1 can be considered for the same and what will be the basis, any code reference?
Regards
Sanj
RE: Pipe Cap elliptical ratio
Regards,
Mike