Am having several welds inspected utilizing UT, am wondering if grinding the caps off is the way to go?
Should the procedure be straight through inspection or shear wave inspected?
Diameters are 20 inch with a 1.5 inch wall thickness.
Am wondering if anyone can explain why the hardness numbers on a fillet weld of P91 materials would be in the 350 to 400 range(vickers)while the valve is around 200 and the pipe is in the 160 range?
The welding procedure was strictly adhered to including the monitoring if interpass temps, PWHT...