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vishnus_2184
Member

Join Date: Sep 2008
Posts: 7

about pqr of tube to tube sheet

09/27/2008 11:49 AM

I have to do procedure qualification for tube #tube sheet joint for my two different jobs, but both having different O/D of the tube & pitch(one is having square & oher one is having triangular pitch) but wall thickness is same in both,

My question is "one PQR is enough for two job ( in that case I am considering small O/D of the tube) or It require two PQR's for two different jobs?
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Abdel Halim Galala
Guru
Engineering Fields - Piping Design Engineering - New Member Egypt - Member - Member since 02/18/2007

Join Date: Feb 2007
Location: Cairo, Egypt
Posts: 1733
Good Answers: 248
#1

Re: about pqr of tube to tube sheet

09/28/2008 4:58 AM

If the range of thicknesses and range of diameters of tubes (same P-Nos.) is the same and -in the same time- the range of thicknesses of tubesheets (same P-Nos.) is the same, in this case a WPS(s) and PQR(s) can cover both of jobs, whatever the type of pitches. Please refer to ASME Code, Section IX for any details.

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vishnus_2184
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Join Date: Sep 2008
Posts: 7
#2
In reply to #1

Re: about pqr of tube to tube sheet

09/28/2008 11:02 AM

thanks for ur comment on this topic , but i want to add to this, tube material for both job is P1 , According to Section IX Ligaments also important what about that? Please help me out ?
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