Dec 17, 2016
Also called Field Heat Treatment Technician
Non Destructive Testing Technicians apply controlled heating and cooling to joints in metal vessels to offset the high temperature effects of welding. The process, also called Post Weld Heat Treatment (PWHT), involves heating welded pieces, keeping them at high temperatures for a period of time and controlling their rate of cooling.
Non Destructive Testing Technicians in the construction industry work on high-pressure welded piping systems and vessels used in chemical processing and power generation plants and refineries.