Full radiography vs 100% radiography

[dajoshi]

Can anyone tell me the difference between Full radiography and 100% radiography.
Also where is it given in ASME Section VIII Div 1

 

[micalbrch]

I think 100 % radiography means that all welded seams must be radiographed over their full length while full radiography means that from each welding seam a certain portion must be radiographed. So 100 % radiography is more than full radiography.

 

[jamesl]

Full radiography is equivalent to RT-1 stamping as defined in UG-116. As you can see, butt welds in small (not exceeding 10"), thin wall nozzles are not required to be RTed.

100% RT means all butt welds, including those in small nozzles will have radiography examination in full length. This is not a code requirement. It is usually a service requirement. Vessels in wet H2S service often require 100% RT.

 

[weldtek]

Full radiography need not be 100% See UW 11(a)(5)(b).