@ ElCidCampeador
I do not know if you really understand the difference.
a)Did you understand my example?
b)Why the SIF is the same in set-in and set-on nozzle attachment, as you say?
c)Why do you mix ASME VIII Div 1 (pressure vessel) with ASME B31.3 (piping)?
d)Why not read ASME VIII Div. 2?
e)...
I have never used welding symbols on pressure vessels, only for fillet welds on clips, ladders, platforms, etc., but not for lifting lugs.
The shop drawings, inspection and test plan, and welding procedure must be used on every weld without any welding symbols.
1) If preheat was performed before welding, I can tell you that for 4mm to 6mm wall thickness (small pipe diameter), 30 minutes PWHT is adequate. 2) Also refer to Figure 1 in NACE SP-0403 "carbon steel no stress relief necessary"
See UG-31
(2) Where ends are threaded, additional wall thickness is to be provided in the amount of 0.8/n in.(20/n mm) [where n equals the number of threads per inch (25.4 mm)]
