ASME SectionVIII, Div 1 Small Openings
ASME SectionVIII, Div 1 Small Openings
(OP)
A 1" nozzle meeting all the requirements of UG-36(c)(3) is exempt from reinforcment calcs. However, if you wish to put this nozzle through the long joint of the shell you now must meet the requirements of UW-14. Am I forced to meet the radiographic requirements of UW-14(b)? As an option can I do the reinforcing calc as per UG-37 and not take the exemption allowed under UG-36(c)(3)?





RE: ASME SectionVIII, Div 1 Small Openings
Well...by doing reinforcement calcs of UG-37, you are not taking the exemption of UG-36(c)(3). In other words, ug 36-C3 says that since your nozzle is small, you don't have to show the calcs done in UG-37.
Hope this helps
RE: ASME SectionVIII, Div 1 Small Openings
To MarcoE:
-it is not exact that one has not to show reinforcement calcs for small openings: they don't even require any reinforcement, other than what is inherent in the minimum neck thickness and weld size as specified by other rules
-the RT requirements per UW-14 need be satisfied before the opening is cut.
prex
http://www.xcalcs.com
Online tools for structural design
RE: ASME SectionVIII, Div 1 Small Openings
-to prex:I didn't say he had to do the calcs, but by doing them anyway (per UG37) you wouldn't be taking the exemption allowed by UG36c3. Just trying to save this guy some unecessary work.
RE: ASME SectionVIII, Div 1 Small Openings
RE: ASME SectionVIII, Div 1 Small Openings
A joints{long seam}. UW-14d speaks of openings adjacent to
the butt welds. Refer to Interpretation VIII-1-83-208,Q-2.
The correct answer of course is to consult your AI and AIA.
RE: ASME SectionVIII, Div 1 Small Openings