ASME Section VIII Div 1 UG-37 area replacement
ASME Section VIII Div 1 UG-37 area replacement
(OP)
Hello everyone,
I am trying to design the reinforcement for a new nozzle and found that the current layout I have is not support by the program Codecalc. I have resorted to doing the area replacement calculation by hand, but was wondering if the methods described in ASME VIII Div 1 UG-37 are not valid for a certain large theta or x values as shown in my diagram. Any advice on the matter would be greatly appreciated. Thank you in advance!
I am trying to design the reinforcement for a new nozzle and found that the current layout I have is not support by the program Codecalc. I have resorted to doing the area replacement calculation by hand, but was wondering if the methods described in ASME VIII Div 1 UG-37 are not valid for a certain large theta or x values as shown in my diagram. Any advice on the matter would be greatly appreciated. Thank you in advance!





RE: ASME Section VIII Div 1 UG-37 area replacement
Are your dimension such that the nozzle is tangent? Is the nozzle OD outside the shell OD maybe?
Regards,
Mike
RE: ASME Section VIII Div 1 UG-37 area replacement
www.pdhonline.org/courses/m205/m205content.pdf
Codecalc's marketing material says it can do it, although I haven't used it myself.
RE: ASME Section VIII Div 1 UG-37 area replacement
RE: ASME Section VIII Div 1 UG-37 area replacement
One last question. Is there some way to combine a hillside nozzle and an angled lateral nozzle? In my scenario I have a hillside nozzle as described above that is angled upwards from the horizontal a couple degrees. This will obviously increase the cutout from the vessel which needs to be accounted for.
Again, any help would be much appreciated.
RE: ASME Section VIII Div 1 UG-37 area replacement
Use vector addition to get the combined angle from the repad area, then use that derived [larger] angle to compute the minimum size for the repad. In other words, 'trick' CODECALC into thinking that this is a simple angle [which it can calc] versus a compound angle [that it can't].
RE: ASME Section VIII Div 1 UG-37 area replacement
But for a couple of degrees of inclination, I would just process the diameter twice. Figure out d' due to 2 deg inclination, then use that enlarged d as input for the hillside calculation. It's bound to be over-conservative, but for 2 degrees it shouldn't matter.