Tube to tube sheet weld joint design

abc123 · **Joined:** Fri Nov 06, 2009 7:02 am **Posts:** 40

i m designing a U tube heat exchanger on ASME III-NB. From where to design "Tube to tube sheet weld joint". i found no detail in NB but there is detail in ASME VIII-1. Can i use those joints.

Regards

Dr. Koelbl · **Posted:** Sun Dec 13, 2009 11:02 pm

No, Sir,

Section III NB is not refering to Section VIII.
I suggest to make the stress analysis according to NB3300 and ask the PRE who will certify the design report.

DK

abc123 · **Joined:** Fri Nov 06, 2009 7:02 am **Posts:** 40

Dr. Koelbl wrote:

No, Sir,

Section III NB is not refering to Section VIII.
I suggest to make the stress analysis according to NB3300 and ask the PRE who will certify the design report.

DK

Thanks DK
"PRE" stands for what.
Kindly also tell how to qualify expanded tube to tube sheet joint i.e. a "tube pull out test". Is there any requirement of code for qualifying expanded joint?

Thanking u in anticipation!

leem817 · **Posted:** Fri Dec 18, 2009 5:14 pm

PRE" stands for what

abc,

I believe he meant RPE not PRE.

RPE "Registered Professional Engineer"

leem817

Dr. Koelbl · **Posted:** Sun Dec 20, 2009 1:54 pm

sure; should have been RPE.

SoRY

DK

leem817 · **Posted:** Tue Dec 22, 2009 9:49 pm

Kindly also tell how to qualify expanded tube to tube sheet joint i.e. a "tube pull out test". Is there any requirement of code for qualifying expanded joint?

abc123,

ASME Code Section 1 Rules for Construction of Power Boiler under Section PFT Rules for Firetube Boiler paragraph 12.2, 12.2.1.1, and 12.2.2 address the requirement for expanded tube to tubesheet.

I don't believe other Code such as Section III-1 and Section VIII-1 address this requirement. For Heat Exchanger requirement go to TEMA Code.

Good luck,

leem

Tube to tube sheet weld joint design

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