ASME VIII Div.1
ASME VIII Div.1
(OP)
Code Reference:
UW-51(b)(3)- Radiographic Examination of Welded Joints.
Background:
UW-51(b): Indications shown on the radiographs of welds and characterized as imperfections are unacceptable under the following conditions.............
(3): any group of aligned indications that have an aggregate length greater than t in a length of 12t, except when the distance between the successive imperfections exceeds 6L where L is the length of the longest imperfection in the group;
Inquiry:
I would like to know if I'm interpreting ASME Section VIII, Div.I, paragraph number UW-51(b)(3) correct. If on a radiograph the group of aligned indications is acceptable under the first part of the paragraph, i.e.: "any group of aligned indications that have an aggregate length greater than 't' in a length of 12t," do I still need to consider the second part of the paragraph that states: "except when the distance between the successive imperfections exceeds 6L where L is the length of the longest imperfection in the group;" ?
Your assistance with this matter will be greatly appreciated.
UW-51(b)(3)- Radiographic Examination of Welded Joints.
Background:
UW-51(b): Indications shown on the radiographs of welds and characterized as imperfections are unacceptable under the following conditions.............
(3): any group of aligned indications that have an aggregate length greater than t in a length of 12t, except when the distance between the successive imperfections exceeds 6L where L is the length of the longest imperfection in the group;
Inquiry:
I would like to know if I'm interpreting ASME Section VIII, Div.I, paragraph number UW-51(b)(3) correct. If on a radiograph the group of aligned indications is acceptable under the first part of the paragraph, i.e.: "any group of aligned indications that have an aggregate length greater than 't' in a length of 12t," do I still need to consider the second part of the paragraph that states: "except when the distance between the successive imperfections exceeds 6L where L is the length of the longest imperfection in the group;" ?
Your assistance with this matter will be greatly appreciated.





RE: ASME VIII Div.1
Second clause is only applicable when the porosity fails the first clause. In the 'real word',an RT that passes the first clause will usually pass the second clause.
RE: ASME VIII Div.1