Flexibility at Low Temperature Test

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According to PMA DO 9.21-4380 test procedures

This standard describes a test procedure to evaluate the flexibility of conduits at low temperatures.
The conduit under test is placed in a climatic chamber at the lowest specified operating temperature for four hours.
It is then removed and immediately bent around a mandrel of diameter related to the outside diameter (OD) of the conduit.
Four classifications are achievable based upon the smallest achievable bending radius without damage.


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