dear friend,
first of all you have to think that in which field you have more interest. A field in which you have much interest, definitely you will do better there. In my view, pipe inspection (quality and inspection) is a particular/specific or you can say a narrow area, where you don't have too many options.
Somewhat similar is the case of power construction. Design have relatively more wider field and options. But this is my personal opinion, finally it is up to you and your interest that which particular field should be selected. best of luck.....
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