After the PWHT it was observed that along the side of the weld a deformation appeared as a collapsed pipe (see figure). After the PWHT were performed hardness test (ICU) and PAUT. All tests were accepted.
The main hypothesis about the causes of the occurrence is related to the thermal expansion constraint (due to heavy equipment and fixation devices).
PWHT Parameters:
Temp. 760 ° C
Time: 2h
Thickness: 15.1mm
Material: A335 Gr.P92
Position: vertical (tube)
Has anyone seen this? What can happen to the mechanical properties of this material? Some bibliographical references that follow. indicate to follow for an opinion?
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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