According to Inspectioneering Journal, a detailed field case study published in the January/February 2026 issue makes the case for phased array ultrasonic testing (PAUT) as a direct replacement for radiographic testing (RT) in heat recovery steam generator piping weld inspections. Authored by Cheng Feng Wang, QHSE Manager at CTCI Machinery Corporation, the article argues PAUT eliminates radiation hazards, delivers real-time inspection data, and avoids the production shutdowns that traditional RT requires.
What It Means for Subcontractors
- Inspection contractors currently certified in RT should consider adding PAUT capabilities, as clients in power generation and oil and gas are actively seeking alternatives that reduce radiation exposure and downtime.
- PAUT’s ability to deliver immediate results on the job site means welding crews can adjust parameters on the spot, reducing rework costs and schedule overruns.
- ASME code compliance remains central to any switch from RT to PAUT, so contractors will need to verify their procedures meet applicable BPV code sections before marketing the service.
