Prepare WPS for OFW

I want to set up WPS for OFW, I welded two coupon and sent it for inspection but the inspector inspect it by RT.
The result was failure due to porosity.
The question here is whether the OFW coupon are inspection it by NDT or just DT.

If you can help me because I am not find the inspection procedure for OFW, or do you know someone who can help me for this problem

Depending specification application.
In ASME IX, there are 2 types of applicaiton, type of tests required in QW-202.

WPS for OFW:

  • Tabe 252 for groove weld procedure.
  • Table 252.1 for overlay.