They shot a 2" 80 weld with the IQI SS from 400mm on MX125 film, and no wires were visible. Shooting it from 400mm with the IQI film side, the wire#5 was visible.
wire no 5 is 0.2mm
F is 4.5mm
d is 60mm (for a 2" pipe)
D = (4.5x60)/0.2 = 1350mm
This is what i get would be the standoff needed...
Thanks for the reply NDEguy.
For the single wall viewing of 2" welds, am I right in thinking that these can be shot from a standoff distance, and the single wall (closest to the film) be interpreted, whether it is shot elliptical or superimposed(top part of the superimposed weld ignored). To...
Can anyone tell me the correct way to shoot a 2" pipe weld using an ir-192 source to Asme V. Does the IQI need to be source side, and thus the standoff distance need to be very long, or can the IQI be film side, the standoff shorter, and only the nearest wall to the film interpretated.
A plant owner user wants to use welding procedures of the original subcontracted piping fabrication company as its own, for maintenance welding. This is for welding to ASME B31.3, and ASME IX, for pressure classes up to 2500#.
Is this allowable? Is there anywhere in the codes which state this.
Does anyone know if a hot tap requires its own welding procedure. I.e does a mockup need to be made, and does it need to pass the ASME IX bend tests.
Or does a qualified welding procedure for the material being welded suffice (i.e a normal fabrication WPS)
