Large Non Radial Openings
Large Non Radial Openings
(OP)
Hi,
can we use appendix 1-7 for non radial openings?
I am reading App 1-7 (b)(1), but still am not sure if this is only applicable to radial nozzles.
Thanks
can we use appendix 1-7 for non radial openings?
I am reading App 1-7 (b)(1), but still am not sure if this is only applicable to radial nozzles.
Thanks





RE: Large Non Radial Openings
I believe rules in 1-7 are not applicable to non-radial nozzles and this is clearly menteioned in the Code.
D2HANDLE
RE: Large Non Radial Openings
RE: Large Non Radial Openings
Appendix 1-7 can be used for non-radial openings.
RE: Large Non Radial Openings
Thanks for your replay!
jakov11000
RE: Large Non Radial Openings
Thanks for presenting the interpretation..
However, please consider that the interpretation also clearly mentions that the rules of 1-7 (a) & 1-7 (c) can be applied for hill side nozzles. But it does not mention so for 1-7 (b).
1-7 (b) provides rules for calculating membrane and bending stresses for nozzles which exceed the limitations of UG-36 (b) (1) and also for the cases where Nozzle dia is > 40” , is >3.4sqrt RT, Vessel dia is > 60” and Rn / R < 0.7.
But the limitation for application for 1-7 (b) rules is that it cannot be applied to non-radial nozzles and it also cannot be applied for nozzles that have internal projections and that have stresses resulting from external mechanical loads acting on the nozzle.
In short, Rules of app. 1-7 can be applied for hill side nozzles, except for the calculation rules specified in 1-7 (b).
Regards,
D2HANDLE