ASME VIII-1 ----> UW-14 Interpretation

[mechyp]

ASME SEC VIII DIV-1 UW-14

As per per UW-14(a) any opining that satisfy reinforcing calculation (UG-37&UG-39) that can located in any weld joint( long seam and Circumferential seam) :

Que: In this case is Any additional NDE Required or not ?

UW-14(b) openings satisfying UG-36(c)(3) may be located in head-to-shell or Category B(Circumferential seam or C butt welded joints, with additional RT

Que: this type of opening Can be located in Category A( long seam Joint)?
if yes than what additional NDE need to perform.



yogesh

 

[gr2vessels]

Reply to First question:
UW-14(a) does not require additional NDE for cutting an opening.
Reply to Second question:
If the opening is cut in a head-to-shell weld AND a long weld, additional RT is required as per UW-14(b). That's my interpretation of these vague articles of ASME code.
Cheers,
gr2vessel

 

[mechyp]

my interpretation for second question

this opening can not located in long seam ( category A) joint.
that's why code did not mention category A in UW-14 (b).

i am not sure about this interpretation.

any other clause for this

yogesh

 

[doct9960]

yp3135,

UW-14(b) applies to openings that do not require reinforcement calculations. If no reinforcement calcs have been made, then you cannot locate your opening in a Category A joint.

If you waive the exemptions in UG-36(c)(3) and perform reinforcement calcs per UG-37 or UG-39, then you are in compliance with UW-14(a), which means you can locate your opening in any welded joint, including a Category A joint.

That's my interpretation.