RT-3

sharjeelfaiz · **Joined:** Mon Oct 15, 2007 6:54 am **Posts:** 128

Hello.

Complete vessel is radiographed as per UG-116 (e) (3) i.e. RT3. Can we use E=1 for seamless dish ends if the customer says.

I believe we cannot as per UW-12 (b), which says that a value not greater than that given in Table UW-12 column (b) shall be used in the design for spot radiographed butt welded joints.

I really appreciate your help.

Thanks.
Sharjeel

Gonzaga · **Joined:** Sat Dec 15, 2001 1:00 am **Posts:** 657

sharjeelfaiz wrote:

Hello.

Complete vessel is radiographed as per UG-116 (e) (3) i.e. RT3. Can we use E=1 for seamless dish ends if the customer says.

I believe we cannot as per UW-12 (b), which says that a value not greater than that given in Table UW-12 column (b) shall be used in the design for spot radiographed butt welded joints.

I really appreciate your help.

Thanks.
Sharjeel

The answer is no. Read UW-12(d), then the referenced UW-11(a)(5)(b), last sentence. An additional spot shall be taken to apply E=1 to the formed head formula.
mauro

AI Guy · **Joined:** Thu Sep 03, 2009 4:34 pm **Posts:** 9

Comment retracted.

sanjeev_shukla70 · **Joined:** Wed Apr 18, 2007 2:05 pm **Posts:** 260

I think the question is about JE to be considered for a seamless head in a vessel subject to spot radiography.

Please refer UW 12 (d)

Code:

Seamless vessel section or heasds shall be considered equivalent to welded parts of the same geometry in which ass category A welds are type 1

Considering the same JE for a seamless head can be considered as 1.

Regards

Gonzaga · **Joined:** Sat Dec 15, 2001 1:00 am **Posts:** 657

sharjeelfaiz wrote:

Hello.

Complete vessel is radiographed as per UG-116 (e) (3) i.e. RT3. Can we use E=1 for seamless dish ends if the customer says.

I believe we cannot as per UW-12 (b), which says that a value not greater than that given in Table UW-12 column (b) shall be used in the design for spot radiographed butt welded joints.

YES WE CAN.
Provided one more spot RT is performed on weld connecting head to shell as provided in UW-11(a)(5)(b).
mauro

I really appreciate your help.

Thanks.
Sharjeel

Juergen Fleischfresser · **Posted:** Tue Sep 08, 2009 8:30 am

Hello,

please take into account, the spot RT as required by UW-12(d) is a spot in addition to the spots as required by UG-116(e)(3) for RT3 stamping. Therefore this additional spot RT leads to stamping of name plate with RT4 according to UG-116(e)(4) and you have to note the extend of RT on the data report.

AI Guy · **Joined:** Thu Sep 03, 2009 4:34 pm **Posts:** 9

Opinion retracted.

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