Pull out test to check the strength of tube to tubesheet (Expanded only ) joint
Pull out test to check the strength of tube to tubesheet (Expanded only ) joint
(OP)
Hi folks ,
Can anyone explain the details of pull out test required to check the strength of tube to tubesheet joint with expansion only.
I need a brief methodology and the standard for acceptance criteria.
Can anyone explain the details of pull out test required to check the strength of tube to tubesheet joint with expansion only.
I need a brief methodology and the standard for acceptance criteria.





RE: Pull out test to check the strength of tube to tubesheet (Expanded only ) joint
https://www.google.com/search?q=pull+out+test+for+...
RE: Pull out test to check the strength of tube to tubesheet (Expanded only ) joint
Regards
r6155
RE: Pull out test to check the strength of tube to tubesheet (Expanded only ) joint
I have two questions. According to ASME Code Sec I:
1) What is the miminum tube wall reduction in percentage after expansion for watertube boiler?
2) Is the minimum thickness is the same in firetube boiler?
Thank you.
Aida
RE: Pull out test to check the strength of tube to tubesheet (Expanded only ) joint
RE: Pull out test to check the strength of tube to tubesheet (Expanded only ) joint
But yes with some searching you will find test methods.
While apparent wall reduction is often referred to, the actual process control is the rolling torque. So people make a mock up tube sheet, usually with a range of hole sizes. And then they roll tubes with a range of rolling torques.
If this is re-tube they will need to put tubes into it, then extract them, then do the testing.
Ask your vendor to share their process for this with you.
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P.E. Metallurgy, Plymouth Tube