Unstayed Flat Head Joint Deficiency 2

[ENG2194]

I have a flat circular head that is welded with a single bevel grove weld inside the shell about 5" from the end (Sec VIII div 1 UG-34 sketch g). The thickness formula in UG-34 (C.2) references a joint efficiency defined as "joint efficiency, from Table UW-12, of any Category A weld as defined in UW-3(a)". Does this mean i can just choose type 1 and get the efficiency correlating to the NDE chosen? In my mind my scenario is a type 7 category c joint ("flat heads to main shell"). How do i get my joint efficiency?

 

[SnTMan]

ENG2194, you are correct the head-shell joint is a Cat C, Type 7. See the Note 5. Weld sizing is per the figure.

If the head itself is seamless E = 1.0, if the head itself is of welded construction, this joint is a Cat A, efficiency per Table UW-12.

Regards,

Mike



The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[david339933]

If the flat head was a large enough diameter that it needed to be made in two or more pieces, then this would be a Cat. A. Seam. This is the E that is referred to in UG-34....not the head to shell corner joint.