Good day all,
I have a question regarding the interpretation of the UW-52 section of ASME Section VIII - Div. I which is about spot examination of welded joints.
Here in the workshop i am looking at nozzle to flange welds of OD 60,3mm x 8,74mm. These are for a heat exchanger and there are four of them for this one vessel.
Now here is the quote from the code:
"One spot shall be examined on each vessel for each 50ft (15,2m) increment of weld or fraction thereof for which a joint efficiency from column (b) of Table UW-12 is selected. However, for identical vessels or parts, each with less than 50ft (15,2m) of weld for which a joint efficiency from column (b) of table UW-12 is selected, 50ft (15,2m) increments of weld may be represented by one spot examination."
So now that the plot is set, here are my questions:
- if these 4 nozzles belong to the same heat exchanger, are these 4 nozzles to be accounted for one increment of weld and thus, only one spot examination (taken randomly on one of the 4) is enough for all ?
- or each nozzle being a different weld seam, each nozzle have to have one spot examination ?
I hope to be clear enough so that it is understandable.
If you can show me the light, it would be greatly appreciated. I have to say the vocabulary in these standards is sometimes tricky and could be open to various interpretations ...
Thanks in advance !
Vinc'