Tensile Test Specimen - API 5L

[Imamzr]

Hi All,

I have a question about test specimen on API 5L requirement. Can anyone explain to me the difference between Full Section specimen and Strip test specimen?

Thankyou

 

[1503-44]

full section is an "O" cut perpedicular to pipe longitudinal axis vs = a strip cut parallel to the pipe longitudinal axis.
You take a full pipe cross-section "O" sample when the pipe is too small a diameter to cut a parallel non-curved strip like this "C".

“What I told you was true ... from a certain point of view.” - Obi-Wan Kenobi, "Return of the Jedi"

 

[EdStainless]

For smaller diameter (say under 3") we take an 18" long piece of tube and put plug in the ends and pull tensile test on it full body or full section.
Now if it is heavy wall (load above our machine) or larger diameter we will cut a longitudinal strip out of the the tube and just flatten the ends for grip, machine a gauge section to precise width, and test that.
The elongation for the strip sample will always be lower, because there is no column collapse contributing to overall elongation.

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P.E. Metallurgy