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PWHT nominal thickness UCS 56

PWHT nominal thickness UCS 56

Code: ASME VIII Div.1
Argument: a set-in joint, type figure UW-16.1(g), between a shell of SA 516 gr.70 and a LF2 forging nozzle.

Shell: SA 516 gr.70 plate thk.40mm
Nozzle: Forging with thickness in the large part 91,8mm

PWHT is required by ASME (UCS-56)
Table UCS-56 says that for the Nominal Thickness to use for the calculation of the minimum PWHT time you must see UW-40(f)
Question: What thickness should I use?
For UW-40(f)(5)(d) it should be 40mm, because I have no PAD, the attachment fillet weld is lower and the only weld is across the shell. Is it correct? Thanks

RE: PWHT nominal thickness UCS 56

40mm is correct. Backed up by UW-40(f)(3) "for groove welds the nominal thickness is the depth of the groove". Groove is set through the shell 40mm.
Don't forget Full RT is mandatory for all Butt welds over 1-1/4" thick.

RE: PWHT nominal thickness UCS 56


Don't forget Full RT is mandatory for all Butt welds over 1-1/4" thick.

david, did you mean to type 1-1/2"??

RE: PWHT nominal thickness UCS 56

No...I said RT, not PWHT.

RE: PWHT nominal thickness UCS 56

My mistake...

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