Non-destructive testing of perforated reinforcement
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When the opening diameter is greater than 0.5 times the diameter of the cylinder, how should the fillet welds between the opening fitting and the cylinder be inspected non-destructively?
When full non-destructive testing is required, for cylinders with a diameter greater than 800 and fittings with a nominal diameter greater than DN200, ultrasonic testing shall be used on the fillet welds.
RT or UT+MT or PT.
When the opening diameter is greater than 0.5 times the cylinder diameter, the requirement of 100% RT, which stems from the standard requirement that the welding joint coefficient be 1, does not apply to the fillet welds between the nozzles and the shell. Rather, it requires the butt welds in the shell encompassing the takeover itself and a radius of 1 time the opening.
Agree with what was explained on floor 7, in the explanation for 150 – it refers to the buttweld