Dear Asad,
The acceptance of PT can't be used for visual defect as this is the acceptance for size of indication only not the size of the defect. 4mm indication may come from 1mm pin hole. It depends on the amount of dye contained by the defect which comes out from the defect (due to blotting action) when developer applied.
The size of defect you are refering may give you 15-20mm indiacation.
Regards.
CK
The acceptance of PT can't be used for visual defect as this is the acceptance for size of indication only not the size of the defect. 4mm indication may come from 1mm pin hole. It depends on the amount of dye contained by the defect which comes out from the defect (due to blotting action) when developer applied.
The size of defect you are refering may give you 15-20mm indiacation.
Regards.
CK
2009/9/28 asad azmi <azmiasadayub@gmail.com>
GOODMORNING...........can anybody can confirm whether a pin hole of diameter 3mm and depth of approximately 5 mm in fillet weld of 6mm of material SA 516GR 70 can be VISUALLY accepted. The vessel is fabricated as per ASME SEC VIII DIV 1.If YES then by which code.Kindly note that if we consider acceptance crieteria for PT/MT, as per ASME SEC VIII DIV 1, APPENDIX 6/8, Rounded indication upto 4.8mm is acceptable.can the above defect can be accepted on the basis of acceptance crieteria of PT/MT.please reply ASAP.Thanks & RegardsAsad Azmi
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